CN101604334B - Caching technology based medical image database searching method and searching system - Google Patents
Caching technology based medical image database searching method and searching system Download PDFInfo
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Abstract
Aiming at the problems in the prior art that when searching image data in a PACS system having a plurality of data, especially searching simultaneously in a plurality of image workstation, workload of a database server is sharply raised, system speed is declined, and the overall cost is added, the invention provides a caching technology based medical image database searching method, which comprises: after receiving an initial searching request, searching firstly in a local caching list; sending final searching request to the database server if not searching it, transmitting it to a local image workstation if the database server searches it, reporting the searching result to the local image workstation if not searching it in the database server. By using the method, the image data searching speed is quickened, the workload of the database server is lightened, and the working efficiency of the PACS system is improved. The invention also provides a a caching technology based medical image database searching system, which is used for guaranteeing implementation and application of the method in actual system.
Description
Technical field
The invention belongs to the database retrieval field, particularly a kind of medical image database search method and searching system.
Background technology
Present Health Institutions such as hospital are in the diagnosis and therapeutic process of disease, in a large number by means of digital device and emerging technologies such as Network Transmission and online storage such as computing machines.Along with being widely used of these equipment, produced a large amount of digital medical image datas, like patient's perspective mating plate, the detection video of body inner structure, the video recording of surgical procedure etc.All these image datas all are the important intangible assets of medical institutions, can be used for case retrieval, teaching playback, experience exchangement etc.For the ease of medical institutions management, safeguard and use these image datas, generally, these image datas by with the format management of database with organize, supply the medical worker to transfer and consult.The design of image database and database index method and enforcement are one of core technologies of medical image file and communication system (PACS).PACS is the abbreviation of English Picture Archiving&Communication System.
PACS is used for the image section office of hospital; Be mainly used in dept. of radiology at first; Through development in recent years, PACS extends to the mutual operation between all image documentation equipments of hospital and even the different hospital image equipment from the image storage between simple several the irradiation image equipment and communicate by letter; Therefore many classification calls appear, like the PACS of dept. of radiology of all image documentation equipment networkings in the dept. of radiology; Realize full PACS of institute of full institute image resource sharing or the like.
In existing PACS system, all be that image data with patient is a system centre.Usually adopt the mode of database to knit image data and other sets of relational data, and store in the middle of the memory device.When the doctor hopes by PACS supporting image workstation extraction, the image data of checking patient and interpolation, when revising patient's review of a film by the censor report; The database client of installing on the image workstation sends database retrieval information to database server, and database server extracts corresponding image data according to search condition and sends back to the local image workstation that the doctor is using.In system scale and database under the data volume condition of limited, image data can be soon, in seconds from database, extracted, and send to client.
But along with the PACS system expands to hospital-wide PACS gradually; And (1TB=1024 * 1024 * 1024 * 1024Byte) are the mass data of unit to the image data in the PACS system with TB along with the time run-up is arrived; The retrieval and the extraction rate of database reduce gradually, and database retrieval becomes the bottleneck of whole PACS system.Particularly at many image workstations simultaneously during accessing database, the working load of database sharply rises, and further causes system speed to descend, and overall cost increases, and has also taken the limited time of doctor.
Therefore; The technician of PACS system presses for develops a kind of data retrieval method of medical imaging fast and efficiently and searching system, makes intrasystem each the diagnosis report workstation of PACS can in the time of calculating with second, can be deployed into image data, patient information and relevant report.
Summary of the invention
The present invention is directed in the prior art; During retrieval image data in having the PACS system of mass data, particularly when many image workstations were retrieved simultaneously, the working load of database server sharply rose; System speed descends; The problem that overall cost increases provides a kind of medical image database search method based on caching technology, in order to quickening image data retrieval rate, the working load that alleviates database server, raising PACS system works efficient.
The present invention also provides a kind of medical image database searching system based on caching technology simultaneously, in order to guarantee realization and the application of said method in real system.
Technical scheme:
A kind of medical image database search method based on caching technology is characterized in that said method comprises the steps:
Steps A, on each image workstation of PACS system, make up the cache table be used for all previous retrieving information of minute book machine, have information bar in the said cache table, the data item of each information bar comprises image data and patient information accordingly with it at least;
Step B, receive the initial retrieval request that comprises search condition when local image workstation after; At first search condition is analyzed; In the information bar of the cache table of local image workstation, retrieve patient information according to the effective search condition after analyzing then; If retrieve the patient information that is complementary with effective search condition, then jump to step D; If do not retrieve the patient information that is complementary with effective search condition, then execution in step C;
Step C, local image workstation send the final retrieval request that comprises said search condition to database server; Said database server receives this final retrieval request and search condition; And extract the information bar at the patient information place that is complementary with said search condition according to the working method of database; Then it is sent back to the local image workstation of initiating final retrieval request, the local image workstation of initiating final retrieval request receives this information bar, and jumps to step D; If database server does not retrieve the patient information that meets said search condition; Then give the local image workstation of initiating final retrieval request with the search result report of search condition mistake; Local image workstation receives the result for retrieval of this search condition mistake, execution in step F then;
Step D, show the data item that comprises image data at least of the information bar at this patient information place at local image workstation;
Step e, will beam back in the cache table that local information bar deposits the local image workstation of initiating retrieval request in based on final retrieval request;
Step F, this retrieves end.
Between step B and step C, also include step B1, local image workstation to other image workstations in consolidated network territory or other image workstations that are set to have relevance in advance with local image workstation send the quadratic search request that comprises said search condition; Said other image workstations receive this quadratic search request and search condition; And at first said search condition is analyzed; Retrieve in the information bar of its cache table according to the effective search condition after analyzing then; If retrieve the patient information that is complementary with said effective search condition; Then the information bar with this patient information place sends back to the local image workstation of initiating the quadratic search request, and the local image workstation of initiating the quadratic search request receives the information bar of beaming back the earliest, and jumps to step D; If other image workstations all do not retrieve the patient information that meets said effective search condition; The search result report that then will not retrieve is given the local image workstation of the request of initiating quadratic search; Local image workstation jumps to step C after receiving the result for retrieval that other image workstations do not retrieve;
Correspondingly, when among the step B if when not retrieving the patient information that is complementary with effective search condition, execution in step B1 then;
Step e will be for beaming back in the cache table that local information bar deposits the local image workstation of initiating retrieval request in based on quadratic search request or final retrieval request.
The data item of each information bar in the said cache table also comprises first weighted value, and the priority level of the height representative place information bar of said first weighted value has determined the priority ranking that this information bar is retrieved in cache table.
The assignment principle of said first weighted value is:
(1) for from other image workstations in consolidated network territory or be set in advance with local image workstation have relevance other image workstations information bar and give initial first weighted value from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time,
Otherwise, then give the first lower weighted value.
Among the said step B,, when in the information bar of the cache table of local image workstation, retrieving, retrieve in proper order according to the height of first weighted value of information bar according to the effective search condition after analyzing; Among the described step B1; Other image workstations in consolidated network territory or other image workstations that have relevance with local image workstation; According to the effective search condition after analyzing; When in the information bar of its cache table, retrieving, retrieve in proper order according to the height of first weighted value of information bar.
Said step e also comprises
The information bar that will in the cache table of local image workstation, retrieve based on the initial retrieval request is given first weighted value again according to the assignment principle of first weighted value;
To beam back the information bar of local image workstation based on quadratic search request or final retrieval request, give initial first weighted value according to the assignment principle of first weighted value.
Said method also comprises sets the step that cache resources that information bar that drop threshold limits different first weighted values allows to use realizes abandoning control.
The information bar that said setting drop threshold limits different first weighted values allows the cache resources of use to realize that the step that abandons control does; By the time triggering information bar total amount in the cache table is judged; When the information bar total amount in the cache table during greater than drop threshold; According to first weighted value order from low to high, abandon the information bar of some or abandon a certain proportion of information bar that accounts for cache table information bar total amount.
This search method also comprises the steps: on each image workstation of PACS system, to make up the workstation linked list of other image workstations that are used for all previous retrieval of minute book machine.
Each image workstation to listing in the said workstation linked list is given second weighted value, and the height of said second weighted value is represented the priority level of this image workstation, has determined this image workstation is sent the priority ranking of quadratic search request.
The assignment principle of said second weighted value is:
(1) gives higher second weighted value to the image workstation of the bar that sends a message back at first based on the quadratic search request;
(2) on the time the most proximad its image workstation that sent the quadratic search request give higher second weighted value.
Sending the quadratic search request that comprises search condition among the said step B1 is that the image workstation of listing in the local work station linked list is sent the quadratic search request that comprises search condition.
Sending the quadratic search request that comprises search condition among the said step B1 is that the image workstation of listing in the local work station linked list is sent the quadratic search request that comprises search condition according to second weighted value height order.
After the local image workstation of transmission quadratic search request receives the information bar of beaming back the earliest among the said step B1; Also to the image workstation in image workstation that beam back this information bar and the local work station linked list be considered in the lump, give this image workstation second weighted value.
The assignment principle of said first weighted value is:
(1) give initial first weighted value for the information bar of the image workstation of listing in the workstation linked list from this local image workstation with from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time,
Otherwise, then give the first lower weighted value.
Among the said step B,, when in the information bar of the cache table of local image workstation, retrieving, retrieve in proper order according to the height of first weighted value of information bar according to the effective search condition after analyzing; Among the described step B1; The image workstation of listing in the workstation linked list of local image workstation; According to the effective search condition after analyzing, when in the information bar of its cache table, retrieving, retrieve in proper order according to the height of first weighted value of information bar.
Said step e also comprises
The information bar that will in the cache table of local image workstation, retrieve based on the initial retrieval request is given the first higher weighted value according to the assignment principle of first weighted value;
To beam back the information bar of local image workstation based on quadratic search request or final retrieval request, give initial first weighted value according to the assignment principle of first weighted value.
Said method also comprises sets the step that cache resources that information bar that drop threshold limits different first weighted values allows to use realizes abandoning control.
A kind of medical image database searching system based on caching technology; It is characterized in that; Said system is included in the cache table that is used for all previous retrieving information of minute book machine on each image workstation of PACS system; Have information bar in the said cache table, the data item of each information bar comprises image data and corresponding with it patient information at least; Said system also is included in the cache table administration module and the analysis module that are used to manage cache table of said each image workstation setting, local retrieval module, request retrieval module, retrieval receiver module, data reception module and local display module;
Effective search condition after said analysis module is used for search condition analyzed and will analyze sends local retrieval module to;
Said local retrieval module is retrieved patient information according to effective search condition in the information bar of the cache table of this locality; If retrieve the patient information that is complementary with effective search condition; Then the information bar with this patient information place sends the retrieval receiver module to; If do not retrieve the patient information that meets effective search condition, the search result report that then will not retrieve is given the retrieval receiver module;
Said retrieval receiver module is used to receive the initial retrieval request and sends search condition to analysis module; If receive the information bar that local retrieval module is beamed back; Then send it to local display module; If receive the report that does not retrieve that local retrieval module is beamed back, then generate final retrieval request and send to database server through the request retrieval module;
The described request retrieval module is used for sending the final retrieval request that comprises said search condition to database server;
Data reception module is used to receive the information bar that database server is beamed back, and sends it to local display module;
Local display module is used for the data item that comprises image data at least of the information bar that retrieves is presented at local client;
The cache table administration module is used for depositing the information bar that the database server that data reception module receives is beamed back in the local cache table.
When said retrieval receiver module is beamed back when receiving the report that does not retrieve that local retrieval module beams back; Then generate other image workstations that the quadratic search request sends to other image workstations in consolidated network territory through the request retrieval module or is set to have with local image workstation relevance in advance; Said retrieval receiver module also is used to receive the quadratic search request and sends search condition to analysis module; If receive the information bar that local retrieval module returns; Then it is sent back to the data reception module of the image workstation of initiating the quadratic search request and the retrieval receiver module that notice is initiated the image workstation of quadratic search request through data transmission blocks; If receive the local report that does not retrieve, then this report is sent back to the retrieval receiver module of the image workstation of initiating the quadratic search request; In addition, after said retrieval receiver module receives the report that other image workstations do not retrieve, then generate final retrieval request and send to database server through the request retrieval module;
The described request retrieval module also is used for sending the quadratic search request that comprises said search condition to other image workstations;
Data reception module also is used to receive the information bar that other image workstations are beamed back, and sends it to local display module;
The information bar that other image workstations that the cache table administration module also is used for data reception module is received are beamed back deposits the local cache table in;
Said system also comprises data transmission blocks, and the information bar that the patient information that is used for that local retrieval module is retrieved belongs to sends to the data reception module of the image workstation of initiating the quadratic search request.
Said cache table administration module also is used for giving first weighted value to each information bar of the said cache table in this locality; The priority level of the height representative place information bar of said first weighted value has determined the priority ranking that this information bar is retrieved in cache table.
The assignment principle of said first weighted value is:
(1) for from other image workstations in consolidated network territory or be set in advance with local image workstation have relevance other image workstations information bar and give initial first weighted value from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time,
Otherwise, then give the first lower weighted value.
Said local retrieval module will be retrieved according to the height of first weighted value of information bar when effectively search condition is retrieved in the information bar of the cache table of this locality in proper order.
The information bar that said cache table administration module will retrieve in the cache table of local image workstation based on the local retrieval module under the initial retrieval request is given the first higher weighted value according to the assignment principle of first weighted value; The information bar that will receive based on the data reception module under quadratic search request or the final retrieval request is given initial first weighted value according to the assignment principle of first weighted value.
Said cache table administration module also realizes abandoning control according to setting the cache resources that information bar that drop threshold limits different first weighted values allows to use; Promptly trigger the information bar total amount in the cache table is judged by the time; When the information bar total amount in the cache table during greater than drop threshold; According to first weighted value order from low to high, abandon the information bar of some or abandon a certain proportion of information bar that accounts for cache table information bar total amount.
This system also is included in the workstation linked list and the workstation linked list administration module that is used to manage this workstation linked list of other image workstations that are used for all previous retrieval of minute book machine on each image workstation of PACS system.
Said workstation linked list administration module is used for giving second weighted value to each image workstation of said workstation linked list; Said second weighted value is just represented the priority level of this image workstation, has determined this image workstation is sent the priority ranking of quadratic search request.
The assignment principle of said second weighted value is:
(1) gives higher second weighted value to the image workstation of beaming back the retrieving information bar based on the quadratic search request at first;
(2) on the time the most proximad its image workstation that sent the quadratic search request give higher second weighted value.
When the described request retrieval module sends the quadratic search request, send the said quadratic search request that comprises search condition to the image workstation of listing in the local work station linked list.
When the described request retrieval module sends the quadratic search request, send the quadratic search request that comprises said search condition according to second weighted value height order to the image workstation of listing in the local work station linked list.
Said workstation linked list administration module is considered the image workstation of the bar that sends a message back the earliest based on the quadratic search request and the image workstation in the local work station linked list in the lump, gives this image workstation second weighted value.
The assignment principle of said first weighted value is:
(1) give initial first weighted value for the information bar of the image workstation of listing in the workstation linked list from local image workstation with from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time,
Otherwise, then give the first lower weighted value.
Technique effect
The present invention combines the PACS system with caching technology, to the retrieval characteristics of each image workstation in the hospital, promptly in general; Every image workstation all has its retrieval preference (image data to a certain section office is retrieved), patient's image data of all previous retrieval is deposited in the local cache table, when initiating retrieval; Preferentially in the cache table of this locality, search; Avoid each image workstation when the retrieval image data, all need the accessing database server, especially when many image workstations are visited simultaneously; The working load of database server is sharply risen, and the situation that causes system speed to descend fast takes place.
Each information bar in the cache table is given first weighted value, and the height of said first weighted value is represented the priority level of corresponding informance bar, has determined the priority ranking that this information bar is retrieved in cache table.Therefore, when the information bar in the cache table is retrieved, retrieve according to the height of the first corresponding weighted value of information bar.
Assignment principle according to first weighted value is carried out assignment to information bar; Make the high relatively weighted value of information bar correspondence commonly used; When the information bar in the cache table was retrieved, commonly used, the frequent information bar of retrieval preferentially was retrieved, and has further improved the speed of retrieval.
For the information bar that does not retrieve in this locality; Preferentially in the cache table of other coherent video workstations, retrieve; And avoid the accessing database server; Reduce the visit capacity of image workstation as far as possible,, go again to search in the database server when when other coherent video workstations do not retrieve yet to database.In practical application; The image workstation that image workstation that can same section office is set to be associated, a certain doctor in most cases is the information material of section's chamber interior to the retrieval of information bar; Therefore; Under the situation that local image workstation does not retrieve, the information that other image workstations that are associated provide can satisfy the Search Requirement of the client of local image workstation basically, has only few part to arrive in the database and searches; All pass through database server when well having solved the image workstation retrieval, the problem that causes system speed to descend at every turn.
Under the preferred situation, on each image workstation of PACS system, make up the workstation linked list of other image workstations that are used for all previous retrieval of minute book machine.And give second weighted value to each image workstation of listing in the workstation linked list, said second weighted value is just represented the priority level of this image workstation, has determined this image workstation is sent the priority ranking of quadratic search request.Therefore; Under the situation about in the local cache table, not retrieving; The image workstation of in the local work station linked list, listing sends the quadratic search request that comprises search condition according to second weighted value height order; Make with the big image workstation of the local image workstation degree of association and preferentially asked, thereby the speed of information bar retrieval further improves.
And,, give first weighted value again after making each retrieval based on the setting of above first weighted value and second weighted value; When in other image workstation retrievals; Also give second weighted value again, along with the passing of service time, retrieval rate is more and more faster; The retrieval preference of each image workstation is desired to add and is highlighted, and makes retrieval be tending towards intelligent.
Because medical image database searching system provided by the invention is that therefore, medical image database searching system of the present invention also possesses above-mentioned technique effect in order to the realization and the application of assurance said method in real system.
Description of drawings
Fig. 1 is the network connection layout of each image workstation of the present invention and database server;
Fig. 2 is the process flow diagram of a kind of embodiment of a kind of medical image database search method based on caching technology of the present invention;
Fig. 3 is the process flow diagram of the preferred embodiment of a kind of medical image database search method based on caching technology of the present invention;
Fig. 4 be with Fig. 3 in the corresponding system architecture diagram of process flow diagram of preferred embodiment.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, be the network connection layout of each image workstation of the present invention and database server.Include image workstation A1, A2, B1 and B2 among the figure, and database server DB.Wherein image workstation A1 and A2 are predefined two image workstations with relevance, and image workstation B1 and B2 are predefined two image workstations with relevance.When a certain image workstation receives retrieval request and the local information bar that is not complementary, send the quadratic search request to the image workstation that has a relevance with this locality.
Such as:
Initiate first initial retrieval request to image workstation A1.
Search condition is: patient name is that Zhang Hua, patient age are that 26 years old, supervision time are 10: 10: 12 on the 1st September in 2008.
This request at first is fed to this locality, carries out matching treatment with the information data in the buffer memory of this locality.Just the doctor once browsed this data in the recent period on this TV station image workstation, comprised that therefore image data, patient data and doctor's advice report can both extract in cache table, and A1 shows by image workstation.
Initiate second initial retrieval request to image workstation A1.
Search condition is: patient name is that Sun Li, patient age are that 21 years old, supervision time are 14: 22: 35 on the 12nd September in 2008.
This request at first is fed to this locality, carries out matching treatment with the information data in the cache table of this locality.After not finding qualified information in the local cache table, this search condition is forwarded to the image workstation A2 that has relevance with this locality.Just the doctor once browsed this information data with image workstation A2.In the cache table of image workstation A2, just can retrieve qualified information data so.This information bar is extracted and demonstration from image workstation A2 through network by image workstation A1.
Initiate the 3rd initial retrieval request to image workstation A1:
Search condition is: patient name is that Zhao Qing, patient age are that 55 years old, supervision time are 11: 34: 51 on the 24th September in 2008.
This request at first is fed to this locality, carries out matching treatment with the information data in the cache table of this locality.When relatively new or these data are the historical data that has been dropped when these data, in the local cache table, do not find qualified information.Then this search condition is transmitted to and local image workstation A2 with relevance thereupon.After also not finding qualified information in the cache table of image workstation A2, this search condition is transmitted to database server DB and retrieves the most at last.Can retrieve these data among the database server DB, from database server DB, extract data through network and show by image workstation A1.
Be illustrated in figure 2 as the process flow diagram of a kind of embodiment of a kind of medical image database search method based on caching technology of the present invention.As shown in the figure, at first on each image workstation of PACS system, make up the cache table that is used for all previous retrieving information of minute book machine, there is information bar in the said cache table, the data item of each information bar comprises image data and corresponding with it patient information at least.After receiving the initial retrieval request that comprises search condition when local image workstation; Search condition is analyzed; In the information bar of the cache table of local image workstation, retrieve patient information according to the effective search condition after analyzing then; If retrieve the patient information that is complementary with effective search condition, then show the data item that comprises image data at least of the information bar at this patient information place at local image workstation; If do not retrieve the patient information that is complementary with effective search condition, then to other image workstations in consolidated network territory or other image workstations that are set to have relevance in advance with local image workstation send the quadratic search request that comprises said search condition.After other image workstations receive quadratic search request and search condition; At first search condition is analyzed; Retrieve in the information bar of its cache table according to the effective search condition after analyzing then; If retrieve the patient information that is complementary with said effective search condition; Then the information bar with this patient information place sends back to the local image workstation of initiating the quadratic search request; The local image workstation of initiating the quadratic search request receives the information bar of beaming back the earliest, shows the data item that comprises image data at least of the information bar at this patient information place at local image workstation, and will beam back in the cache table that local information bar deposits the local image workstation of initiating the quadratic search request in based on this quadratic search request; If other image workstations all do not retrieve the patient information that meets effective search condition; The search result report that then will not retrieve is given the local image workstation of the request of initiating quadratic search; Local image workstation sends the final retrieval request that comprises said search condition after receiving the report that other image workstations do not retrieve to database server.Said database server receives final retrieval request and search condition; And extract the information bar at the patient information place that is complementary with search condition according to the working method of database; Then it is sent back to the local image workstation of initiating retrieval request; The local image workstation of initiating retrieval request receives this information bar; Show the data item that comprises image data at least of the information bar at this patient information place at local image workstation, and will beam back in the cache table that local information bar deposits the local image workstation of initiating retrieval request in based on this final retrieval request; If database server does not retrieve the patient information that meets search condition, then give the local image workstation of initiating retrieval request with the search result report of search condition mistake.
Preferably, give first weighted value to each information bar in the cache table, the priority level of the height representative place information bar of first weighted value has determined the priority ranking that this information bar is retrieved in cache table.No matter be based on the initial retrieval request and also be based on the quadratic search request, when the information bar that is complementary according to retrieval in the effective cache table of search condition, just can retrieve in proper order according to the height of first weighted value of information bar in this locality.
The assignment principle of first weighted value is:
(1) for from other image workstations in consolidated network territory or be set in advance with local image workstation have relevance image workstation information bar and give initial first weighted value from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time,
Otherwise, then give the first lower weighted value.
That is to say that information bar and the most recently used information bar often used preferentially are retrieved.Therefore, have the advantages that based on the image workstation in the medical image database it retrieves preference, retrieval rate can improve greatly, and along with system's increase of service time, the retrieval advantage of this search method can highlight further.
After retrieving information bar,, give initial first weighted value according to the assignment principle of first weighted value if beam back local information bar based on quadratic search request or final retrieval request at every turn; If, give the first higher weighted value in the cache table of local image workstation according to the assignment principle of first weighted value based on the information bar that the initial retrieval request retrieves.
Preferably, method of the present invention comprises that also setting the cache resources that information bar that drop threshold limits different first weighted values allows to use realizes abandoning the step of control, thereby optimizes cache resources.
Particularly; This step is every and at regular intervals the total amount of the information bar in the cache table is judged; When the information bar total amount in the cache table during greater than drop threshold; According to first weighted value order from low to high, abandon the information bar of some or abandon a certain proportion of information bar that accounts for cache table information bar total amount.
Preferably, when structure is used for the cache table of all previous retrieving information of minute book machine on each image workstation of PACS system, also make up the workstation linked list of other image workstations that are used for all previous retrieval of minute book machine.Like this, when in the local cache table, not retrieving the information bar that is complementary with effective search condition, the image workstation that can in local linked list, list sends the quadratic search request that comprises search condition, makes quadratic search more targeted.
Further, give second weighted value to each image workstation in the said workstation linked list, said second weighted value is just represented the priority level of this image workstation, has determined this image workstation is sent the priority ranking of quadratic search request.The assignment principle of second weighted value can for:
(1) gives higher second weighted value to the image workstation of the bar that sends a message back at first based on the quadratic search request;
(2) on the time the most proximad its image workstation that sent the quadratic search request give higher second weighted value.
At this moment; When in the local cache table, not retrieving the information bar that is complementary with effective search condition; The image workstation that can in local linked list, list sends the quadratic search request that comprises search condition according to second weighted value height order, makes the more intellectuality of step of sending retrieval request to related image workstation.In fact, the quadratic search request at first is to asking with the image workstation transmission that local image workstation relevance is communicated by letter frequent greatly, recently, making that therefore the successful probability of quadratic search is big, shorten retrieval time.
See shown in Figure 3ly, be the process flow diagram of the preferred embodiment of a kind of medical image database search method based on caching technology of the present invention.
Shown in Fig. 3 (a); At first on each image workstation of PACS system, make up cache table that is used for all previous retrieving information of minute book machine and the workstation linked list that is used for other image workstations of all previous retrieval of minute book machine; Have information bar in the said cache table, the data item of each information bar comprises image data and corresponding with it patient information at least.After receiving the initial retrieval request that comprises search condition when local image workstation; Search condition is analyzed; Retrieve patient information in proper order according to the effective search condition height according to first weighted value in the information bar of the cache table of local image workstation after analyzing then; If retrieve the patient information that is complementary with effective search condition; The data item that comprises image data at least that then shows the information bar at this patient information place at local image workstation, and the information bar in this information bar and the local cache table considered in the lump, give this information bar first weighted value again according to the assignment principle of first weighted value; If do not retrieve the patient information that is complementary with effective search condition, then the image workstation in the local work station linked list is sent the quadratic search request that comprises said search condition in proper order according to the height of second weighted value.After image workstation in the workstation linked list receives quadratic search request and search condition; Search condition is analyzed; Retrieve in proper order according to the height according to first weighted value of information bar in its cache table of the effective search condition after analyzing; If retrieve the patient information that is complementary with said effective search condition; Then the information bar with this patient information place sends back to the local image workstation of initiating the quadratic search request; The local image workstation of initiating the quadratic search request receives the information bar of beaming back the earliest; Show the data item that comprises image data at least of the information bar at this patient information place at local image workstation, will beam back in the cache table that local information bar deposits the local image workstation of initiating retrieval request in based on this quadratic search request then, and give initial first weighted value this information bar.
In addition, will the send a message back image workstation of bar and the image workstation in the local work station linked list of local image workstation considered in the lump, gives this image workstation second weighted value again according to the assignment principle of second weighted value.If the image workstation of listing in the local work station linked list does not all retrieve the patient information that meets effective search condition; The search result report that then will not retrieve is given the local image workstation of the request of initiating quadratic search; Local image workstation sends the final retrieval request that comprises search condition after receiving the report that other image workstations do not retrieve to database server.Said database server receives final retrieval request and search condition; And extract the information bar at the patient information place that is complementary with search condition according to the working method of database; Then it is sent back to the local image workstation of initiating final retrieval request; The local image workstation of initiating final retrieval request receives this information bar; Show the data item that comprises image data at least of the information bar at this patient information place at local image workstation, and will beam back in the cache table that local information bar deposits the local image workstation of initiating final retrieval request in, give this information bar initial first weighted value based on this final retrieval request.If database server does not retrieve the patient information that meets search condition, then give the local image workstation of initiating retrieval request with the search result report of search condition mistake.
In addition; Shown in Fig. 3 (b); Trigger by the time and the total amount of the information bar in the cache table to be judged the time interval can be 12 hours or 24 hours or other schedule times, when the information bar total amount in the cache table during greater than drop threshold; According to first weighted value order from low to high, abandon the information bar of some or abandon a certain proportion of information bar that accounts for cache table information bar total amount.
Fig. 4 be with Fig. 3 in the corresponding system architecture diagram of process flow diagram of preferred embodiment.The logical organization of this system comprises data Layer, service layer, operation layer and display layer.
Said data Layer comprises cache table and workstation linked list; Said cache table is used for all previous retrieving information of minute book machine; Wherein have information bar, the data item of each information bar comprises image data, first weighted value of corresponding patient information and this information with it at least; Said workstation linked list is used for other image workstations of all previous retrieval of minute book machine, and each image workstation of listing in the workstation linked list is all to there being second weighted value.
Said service layer includes cache table administration module and the workstation linked list administration module that is respectively applied for management cache table and workstation linked list, and analysis module, data transmission blocks and data reception module.Said cache table administration module is used for the information bar that obtains from this locality retrieval and the information bar of local cache table are considered in the lump; Again give first weighted value; The information bar that other image workstations that are used for receiving or database server are beamed back deposits the local cache table in; And give initial first weighted value to this information bar; Also be used for realizing abandoning control, promptly trigger the total amount of the information bar in the cache table is judged, when the information bar total amount in the cache table during greater than drop threshold by the time according to setting the cache resources that information bar that drop threshold limits different first weighted values allows to use; According to first weighted value order from low to high, abandon the information bar of some or abandon a certain proportion of information bar that accounts for cache table information bar total amount.Said workstation linked list administration module is used for the image workstation of the bar that sends a message back the earliest based on the quadratic search request and the image workstation of local work station linked list are considered in the lump, gives this image workstation second weighted value again.Effective search condition after said analysis module is used for search condition analyzed and will analyze sends local retrieval module to.The information bar that the patient information that said data transmission blocks is used for that local retrieval module is retrieved belongs to sends to the data reception module of the image workstation of initiating the quadratic search request.Data reception module is used to receive the information bar that other image workstations or database server are beamed back, and sends it to local display module.
Said operation layer comprises retrieval receiver module, local retrieval module and request retrieval module.Said retrieval receiver module is used to receive the initial retrieval request and sends search condition to analysis module; If receive the information bar that local retrieval module is beamed back; Then send it to local display module; If receive the report that does not retrieve that local retrieval module is beamed back; Then generate the quadratic search request and the image workstation of listing in the local work station linked list is sent the quadratic search request that comprises search condition according to second weighted value height order through the request retrieval module; Said retrieval receiver module also is used to receive the quadratic search request and sends search condition to analysis module, if receive the information bar that local retrieval module is beamed back, then it is sent back to the data reception module of the image workstation of initiating the quadratic search request and the retrieval receiver module that notice is initiated the image workstation of quadratic search request through data transmission blocks; If receive the local report that does not retrieve, then this report is sent back to the retrieval receiver module of the image workstation of initiating the quadratic search request; In addition, after said retrieval receiver module receives the report that the image workstation listed in the workstation linked list do not retrieve, then generate final retrieval request and send to database server through the request retrieval module.Said local retrieval module is retrieved patient information in proper order according to the effective search condition height according to first weighted value of information bar in the local cache table; If retrieve the patient information that is complementary with effective search condition; Then the information bar with this patient information place sends the retrieval receiver module to; If do not retrieve the patient information that meets effective search condition, the search result report that then will not retrieve is given the retrieval receiver module.The image workstation that the described request retrieval module is used for listing to the local work station linked list sends the quadratic search request that comprises search condition according to second weighted value height order and sends the final retrieval request that comprises search condition to database server.
Said display layer comprises local display module, is used for the data item that comprises image data at least of the information bar that retrieves is presented at local client.
Utilize the present invention, can from database, extract image data apace, accomplish the exchange of image data efficiently.In addition, the present invention can also need frequent image/video data to extract at other, is applied in the retrieval like the distributed multimedia Database Systems, for example video on-demand system and system of digital library etc.In these DCEs, to execute the task by the computing machine that connects through communication network, corresponding arithmetic module can be arranged in local computer and the remote server that comprises memory device.
Claims (18)
1. the medical image database search method based on caching technology is characterized in that said method comprises the steps:
Steps A, on each image workstation of PACS system, make up the cache table be used for all previous retrieving information of minute book machine, have information bar in the said cache table, the data item of each information bar comprises image data and patient information accordingly with it at least;
Step B, receive the initial retrieval request that comprises search condition when local image workstation after; At first search condition is analyzed; In the information bar of the cache table of local image workstation, retrieve patient information according to the effective search condition after analyzing then; If retrieve the patient information that is complementary with effective search condition, then jump to step D; If do not retrieve the patient information that is complementary with effective search condition, then execution in step C;
Step C, local image workstation send the final retrieval request that comprises said search condition to database server; Said database server receives this final retrieval request and search condition; And extract the information bar at the patient information place that is complementary with said search condition according to the working method of database; Then it is sent back to the local image workstation of initiating final retrieval request, the local image workstation of initiating final retrieval request receives this information bar, and jumps to step D;
If database server does not retrieve the patient information that meets said search condition; Then give the local image workstation of initiating final retrieval request with the search result report of search condition mistake; Local image workstation receives the result for retrieval of this search condition mistake, execution in step F then;
Step D, show the data item that comprises image data at least of the information bar at this patient information place at local image workstation;
Step e, will beam back in the cache table that local information bar deposits the local image workstation of initiating retrieval request in based on final retrieval request;
Step F, this retrieves end;
Between step B and step C, also include step B1, local image workstation to other image workstations in consolidated network territory or other image workstations that are set to have relevance in advance with local image workstation send the quadratic search request that comprises said search condition; Said other image workstations receive this quadratic search request and search condition; And at first said search condition is analyzed; Retrieve in the information bar of its cache table according to the effective search condition after analyzing then; If retrieve the patient information that is complementary with said effective search condition; Then the information bar with this patient information place sends back to the local image workstation of initiating the quadratic search request, and the local image workstation of initiating the quadratic search request receives the information bar of beaming back the earliest, and jumps to step D; If other image workstations all do not retrieve the patient information that meets said effective search condition; The search result report that then will not retrieve is given the local image workstation of the request of initiating quadratic search; Local image workstation jumps to step C after receiving the result for retrieval that other image workstations do not retrieve;
Correspondingly, when among the step B if when not retrieving the patient information that is complementary with effective search condition, execution in step B1 then; Step e will be for beaming back in the cache table that local information bar deposits the local image workstation of initiating retrieval request in based on quadratic search request or final retrieval request.
2. a kind of medical image database search method according to claim 1 based on caching technology; It is characterized in that; The data item of each information bar in the said cache table also comprises first weighted value; The priority level of the height representative place information bar of said first weighted value has determined the priority ranking that this information bar is retrieved in cache table.
3. a kind of medical image database search method based on caching technology according to claim 2 is characterized in that the assignment principle of said first weighted value is:
(1) for from other image workstations in consolidated network territory or be set in advance with local image workstation have relevance other image workstations information bar and give initial first weighted value from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time, otherwise, then give the first lower weighted value.
4. a kind of medical image database search method according to claim 3 based on caching technology; It is characterized in that; Among the said step B; According to the effective search condition after analyzing, when in the information bar of the cache table of local image workstation, retrieving, retrieve in proper order according to the height of first weighted value of information bar; Among the described step B1; Other image workstations in consolidated network territory or other image workstations that have relevance with local image workstation; According to the effective search condition after analyzing; When in the information bar of its cache table, retrieving, retrieve in proper order according to the height of first weighted value of information bar.
5. a kind of medical image database search method based on caching technology according to claim 3 is characterized in that said step e also comprises
The information bar that will in the cache table of local image workstation, retrieve based on the initial retrieval request is given first weighted value again according to the assignment principle of first weighted value;
To beam back the information bar of local image workstation based on quadratic search request or final retrieval request, give initial first weighted value according to the assignment principle of first weighted value.
6. according to the described a kind of medical image database search method of one of claim 3 to 5 based on caching technology; It is characterized in that said method comprises that also setting letter that drop threshold limits different first weighted values thinks the step that cache resources that bar allows to use realizes abandoning control.
7. a kind of medical image database search method according to claim 6 based on caching technology; It is characterized in that; The information bar that said setting drop threshold limits different first weighted values allows the cache resources of use to realize that the step that abandons control does; By the time triggering information bar total amount in the cache table is judged; When the information bar total amount in the cache table during,, abandon the information bar of some or abandon a certain proportion of information bar that accounts for cache table information bar total amount according to first weighted value order from low to high greater than drop threshold.
8. a kind of medical image database search method according to claim 1 based on caching technology; It is characterized in that this search method also comprises the steps: on each image workstation of PACS system, to make up the workstation linked list of other image workstations that are used for all previous retrieval of minute book machine.
9. a kind of medical image database search method according to claim 8 based on caching technology; It is characterized in that; Each image workstation to listing in the said workstation linked list is given second weighted value; The height of said second weighted value is represented the priority level of this image workstation, has determined this image workstation is sent the priority ranking of quadratic search request.
10. a kind of medical image database search method based on caching technology according to claim 9 is characterized in that the assignment principle of said second weighted value is:
(1) gives higher second weighted value to the image workstation of the bar that sends a message back at first based on the quadratic search request;
(2) on the time the most proximad its image workstation that sent the quadratic search request give higher second weighted value.
11. a kind of medical image database search method according to claim 8 based on caching technology; It is characterized in that sending the quadratic search request that comprises search condition among the said step B1 is that the image workstation of listing in the local work station linked list is sent the quadratic search request that comprises search condition.
12. according to claim 9 or 10 described a kind of medical image database search methods based on caching technology; It is characterized in that sending the quadratic search request that comprises search condition among the said step B1 is that the image workstation of listing in the local work station linked list is sent the quadratic search request that comprises search condition according to second weighted value height order.
13. a kind of medical image database search method according to claim 12 based on caching technology; It is characterized in that; After the local image workstation of transmission quadratic search request receives the information bar of beaming back the earliest among the said step B1; Also to the image workstation in image workstation that beam back this information bar and the local work station linked list be considered in the lump, give this image workstation second weighted value.
14. to one of 11 described a kind of medical image database search methods, it is characterized in that the assignment principle of said first weighted value is according to Claim 8 based on caching technology:
(1) give initial first weighted value for the information bar of the image workstation of listing in the workstation linked list from this local image workstation with from the information bar of database server, said initial first weighted value is lower than other first weighted values;
(2) give the first higher weighted value for the information bar of retrieving recently on the time, otherwise, then give the first lower weighted value.
15. a kind of medical image database search method according to claim 14 based on caching technology; It is characterized in that; Among the said step B; According to the effective search condition after analyzing, when in the information bar of the cache table of local image workstation, retrieving, retrieve in proper order according to the height of first weighted value of information bar; Among the described step B1; The image workstation of listing in the workstation linked list of local image workstation; According to the effective search condition after analyzing, when in the information bar of its cache table, retrieving, retrieve in proper order according to the height of first weighted value of information bar.
16. a kind of medical image database search method based on caching technology according to claim 15 is characterized in that said step e also comprises:
The information bar that will in the cache table of local image workstation, retrieve based on the initial retrieval request is given the first higher weighted value according to the assignment principle of first weighted value;
To beam back the information bar of local image workstation based on quadratic search request or final retrieval request, give initial first weighted value according to the assignment principle of first weighted value.
17. a kind of medical image database search method according to claim 16 based on caching technology; It is characterized in that said method also comprises sets the step that cache resources that information bar that drop threshold limits different first weighted values allows to use realizes abandoning control.
18. medical image database searching system based on caching technology; It is characterized in that; Said system is included in the cache table that is used for all previous retrieving information of minute book machine on each image workstation of PACS system; Have information bar in the said cache table, the data item of each information bar comprises image data and corresponding with it patient information at least; Said system also is included in the cache table administration module and the analysis module that are used to manage cache table of said each image workstation setting, local retrieval module, request retrieval module, retrieval receiver module, data reception module and local display module;
Effective search condition after said analysis module is used for search condition analyzed and will analyze sends local retrieval module to;
Said local retrieval module is retrieved patient information according to effective search condition in the information bar of the cache table of this locality; If retrieve the patient information that is complementary with effective search condition; Then the information bar with this patient information place sends the retrieval receiver module to; If do not retrieve the patient information that meets effective search condition, the search result report that then will not retrieve is given the retrieval receiver module;
Said retrieval receiver module is used to receive the initial retrieval request and sends search condition to analysis module; If receive the information bar that local retrieval module is beamed back; Then send it to local display module; If receive the report that does not retrieve that local retrieval module is beamed back, then generate final retrieval request and send to database server through the request retrieval module;
The described request retrieval module is used for sending the final retrieval request that comprises said search condition to database server;
Data reception module is used to receive the information bar that database server is beamed back, and sends it to local display module;
Local display module is used for the data item that comprises image data at least of the information bar that retrieves is presented at local client;
The cache table administration module is used for depositing the information bar that the database server that data reception module receives is beamed back in the local cache table;
When said retrieval receiver module is beamed back when receiving the report that does not retrieve that local retrieval module beams back; Then generate other image workstations that the quadratic search request sends to other image workstations in consolidated network territory through the request retrieval module or is set to have with local image workstation relevance in advance; Said retrieval receiver module also is used to receive the quadratic search request and sends search condition to analysis module; If receive the information bar that local retrieval module returns; Then it is sent back to the data reception module of the image workstation of initiating the quadratic search request and the retrieval receiver module that notice is initiated the image workstation of quadratic search request through data transmission blocks; If receive the local report that does not retrieve, then this report is sent back to the retrieval receiver module of the image workstation of initiating the quadratic search request; In addition, after said retrieval receiver module receives the report that other image workstations do not retrieve, then generate final retrieval request and send to database server through the request retrieval module;
The described request retrieval module also is used for sending the quadratic search request that comprises said search condition to other image workstations;
Data reception module also is used to receive the information bar that other image workstations are beamed back, and sends it to local display module;
The information bar that other image workstations that the cache table administration module also is used for data reception module is received are beamed back deposits the local cache table in;
Said system also comprises data transmission blocks, and the information bar that the patient information that is used for that local retrieval module is retrieved belongs to sends to the data reception module of the image workstation of initiating the quadratic search request.
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