JP2009279343A - Catheter system and catheter - Google Patents

Abstract

An object of the present invention is to quantitatively measure a load applied to a catheter and prevent destruction of the catheter due to an excessive load.
In an X-ray diagnostic apparatus having a catheter formed by bringing a plurality of strands close to each other in a coil shape, at least one of the plurality of strands forming the catheter is loaded on the catheter. Is a detectable wire. For example, an optical fiber strain sensor 31 capable of detecting a stress generated in the catheter 30 is used as a strand capable of detecting this load.
[Selection] Figure 3

Description

  The present invention relates to a catheter device and a catheter having a catheter formed by bringing a plurality of strands close to each other in a coil shape, and more particularly to a technique for measuring a load applied to the catheter.

  Conventionally, there is a technique for treating a vascular stenosis by inserting a catheter into a blood vessel such as a coronary artery while viewing a fluoroscopic image. In this procedure, the surgeon adjusts the catheter's direction, posture, behavior, etc. while viewing the image displayed on the fluoroscopic image. It is common to check the feeling at hand. Therefore, a lot of experience and skill are required for the surgeon when performing this procedure.

  Therefore, conventionally, various techniques have been devised to assist the surgeon when such a procedure is performed. For example, in Patent Document 1, it is easy to see the distal end of the catheter by moving the holding device holding the X-ray source and the X-ray detector or the top plate on which the subject is placed according to the movement of the distal end portion of the catheter. A technique for automatically displaying the position is disclosed (for example, see Patent Document 1).

  Further, as a catheter used for the treatment of the above-mentioned vascular stenosis, there is a catheter called “penetrating catheter”. This penetrating catheter is a catheter formed by coiling together a plurality of steel strands. By rotating like a drill, it can carry balloons and stents like chronic complete occlusion. The hole can be penetrated to a site where calcification has progressed as difficult.

  In the treatment using such a penetrating catheter, if an excessive load is applied to the catheter during operation, there is a case where the catheter is broken so that the coil is frayed. In order to remove the catheter that has been broken in the blood vessel, a great deal of labor and time is required, and the burden on the subject is large. This also increases the risk of complications.

JP 2003-284716 A

  However, the conventional technique represented by Patent Document 1 described above does not provide a means for quantitatively measuring the load applied to the catheter. For this reason, it has been extremely difficult to prevent the catheter from being destroyed due to an excessive load.

  The present invention has been made to solve the above-described problems caused by the prior art, and it is possible to quantitatively measure the load applied to the catheter and prevent destruction of the catheter due to excessive load. An object of the present invention is to provide a catheter device and a catheter.

  In order to solve the above-described problems and achieve the object, the present invention according to claim 1 is a catheter device having a catheter formed by bringing a plurality of strands close to each other in a coil shape. At least one of the wires is a strand capable of detecting a load applied to the catheter.

  The present invention according to claim 8 is a catheter formed by bringing a plurality of strands close to each other in a coil shape, and at least one of the strands can detect a load applied to the catheter. It is characterized by possible strands.

  According to the first or eighth aspect of the present invention, it is possible to quantitatively measure the load applied to the catheter and to prevent the destruction of the catheter due to the excessive load.

  Exemplary embodiments of a catheter device and a catheter according to the present invention will be described below in detail with reference to the accompanying drawings. Hereinafter, a case where the present invention is applied to an X-ray diagnostic apparatus will be described.

  First, the overall configuration of the X-ray diagnostic apparatus according to the present embodiment will be described. FIG. 1 is a configuration diagram illustrating the overall configuration of the X-ray diagnostic apparatus according to the present embodiment. As shown in the figure, the X-ray diagnostic apparatus includes an X-ray generation unit 1, an X-ray detection unit 2, a mechanism unit 3, a high voltage generation unit 4, a C arm 5, a top plate 6, The display unit 7 includes an operation unit 8, a system control unit 9, a catheter information acquisition unit 10, a timing information acquisition unit 20, and an image processing unit 100.

  The X-ray generator 1 is an apparatus that generates X-rays to be irradiated on the subject P on the top 6, and generates an X-ray using a high voltage supplied from the high voltage generator 4, An X-ray restrictor is provided that controls the irradiation field by shielding a part of the X-rays generated by the X-ray tube.

  The X-ray detector 2 is an apparatus that generates X-ray image data by detecting X-rays that have passed through the subject P, and includes a flat detector that detects X-rays, a gate driver that extracts charges from the flat detector, and a gate It has a charge / voltage converter for converting the charge taken out by the driver into a voltage, and an A / D converter for converting the voltage converted by the charge / voltage converter into a digital value.

  The mechanism unit 3 is a device that moves the C-arm 5 and the top plate 6, and includes a C-arm rotation / movement mechanism that rotates and moves the C-arm 5, a top-plate movement mechanism that moves the top plate 6, and a system A mechanism control unit that controls the C-arm rotation / movement mechanism and the top board movement mechanism based on an instruction from the control unit 9 is provided.

  The high voltage generation unit 4 is a device that supplies a high voltage required by the X-ray generation unit 1 to generate X-rays, and controls the generation of the high voltage based on an instruction from the system control unit 9 to An X-ray control unit that controls generation and a high-voltage generator that generates high voltage. The C arm 5 is an arm that holds the X-ray generation unit 1 and the X-ray detection unit 2, and the top plate 6 is a plate on which the subject P is placed.

  The display unit 7 is a device that displays an image processed by the image processing unit 100, and includes a monitor that displays an image and a display control unit that controls display on the monitor. The operation unit 8 includes a mouse, a keyboard, a joystick, and the like, and is a console that receives an operation by an operator. The system control unit 9 is a device that controls the entire X-ray diagnostic apparatus based on the operation of the operator.

  Here, among the functional units described above, the X-ray generation unit 1, the X-ray detection unit 2, the mechanism unit 3, the high voltage generation unit 4, the C arm 5, the top plate 6, the operation unit 8, and the system control unit 9 are: As a whole, an X-ray image collection unit 200 that collects X-ray image data related to the subject P in real time is configured.

  The catheter information acquisition unit 10 is connected to a catheter not shown in the figure, and shows information (hereinafter referred to as “stress information”) indicating the stress generated in the catheter, and information (hereinafter referred to as “the stress information”). It is a processing unit that acquires information indicating the amount of operation of the catheter (hereinafter referred to as “operation amount information”).

  The timing information acquisition unit 20 is connected to an electrocardiograph (not shown in the figure), acquires information related to the electrocardiogram of the subject P from the electrocardiograph, and uses the acquired information as timing information to obtain a CT image to be described later. The data is output to the alignment unit 170.

  The image processing unit 100 is a processing unit that generates an X-ray image (X-ray fluoroscopic image) based on the X-ray image data generated by the X-ray detection unit 2.

  The overall configuration of the X-ray diagnostic apparatus according to the present embodiment has been described above. In this embodiment, in this X-ray diagnostic apparatus, the catheter connected to the catheter information acquisition unit 10 is loaded on the catheter during treatment. The image processing unit 100 includes a means for detecting the load on the catheter, and the image processing unit 100 includes a means for displaying information on a load applied to the catheter during treatment. Therefore, in the following, the catheter and the image processing unit 100 according to the present embodiment will be described in detail with reference to FIGS.

  First, configurations of the catheter, the catheter information acquisition unit 10 and the image processing unit 100 according to the present embodiment will be described. FIG. 2 is a functional block diagram illustrating configurations of the catheter, the catheter information acquisition unit 10, and the image processing unit 100 according to the present embodiment.

  The catheter 30 is a penetrating catheter formed by bringing a plurality of steel strands close to each other in a coil shape. As shown in the figure, an optical fiber strain sensor 31, a position sensor 32, and an operation amount sensor 33 are provided. And have. The tip of the catheter 30 is also provided with a drill for penetrating a hole in a calcified portion or the like.

  The optical fiber strain sensor 31 is a sensor that detects a load applied to the catheter 30 as a stress generated in the catheter 30. FIG. 3 is a diagram illustrating a configuration of the catheter 30 according to the present embodiment. As shown in the figure, specifically, the optical fiber strain sensor 31 is provided in the catheter 30 by being replaced with at least one of the plurality of strands forming the catheter 30.

  The catheter 30 is rotated by the operator mainly about the major axis direction. The stress generated by the rotation operation acts as a bending stress on the strand of the catheter 30. The optical fiber strain sensor 31 detects the strain (deformation) of the fiber caused by the bending stress as a change in light signal.

  For example, one of the types of the optical fiber strain sensor 31 is an optical fiber grating (FBG) sensor. This sensor has a structure in which a diffraction grating (grating) is provided in a core portion of an optical fiber.

This FBG optical fiber strain sensor has the following characteristics.
(1) By providing multiple diffraction gratings that reflect different frequencies in the optical fiber, it is possible to measure the strain of the optical fiber at each location where the diffraction grating is installed.
(2) The structure is simple and the dimensions can be reduced. A product having an outer diameter on the order of several tens of μm is commercially available.

  FIG. 4 is a diagram illustrating the principle of an FBG optical fiber strain sensor. The feature (1) will be described in detail with reference to FIG. As shown in the figure, the diffraction grating in which the refractive index of the core portion of the optical fiber is periodically changed reflects only light having a specific wavelength (Bragg wavelength) according to the period and the amount of change in the refractive index. That is, the period of the diffraction grating (Grating period) changes due to optical fiber distortion, and the wavelength of the reflected light changes. Conversely, strain can be measured by measuring the amount of change in the wavelength of the reflected light.

  In addition, by changing the wavelength reflected by the diffraction grating provided at each position, it is possible to specify which diffraction grating is reflected by the wavelength of the detected reflected light. At this time, the period of the diffraction grating at each location is determined based on the amount of change in wavelength expected to occur due to distortion of the optical fiber.

  In this embodiment, the strain at each location in the optical fiber is measured using such an FBG optical fiber strain sensor. FIG. 5 is an image diagram showing an installation image of the optical fiber strain sensor 31 according to the present embodiment. As shown in the figure, the diffraction grating (FGB) is densely installed in the vicinity of the tip portion where the calcification site is directly excavated. Then, the measured strain is transmitted as an optical signal to the stress measurement unit 11 (optical signal-stress conversion device) outside the body of the subject via an optical fiber.

  In the catheter 30, a range where the FGB of the optical fiber strain sensor 31 is installed, that is, a range in which the load can be measured is hereinafter referred to as a “load measurement range”. The length of this load measurement range varies depending on the specification of the catheter.

  Returning to FIG. 2, the position sensor 32 is a sensor that is attached to the distal end of the catheter 30 and detects the position of the distal end of the catheter 30.

  The operation amount sensor 33 is a sensor that detects operation amount information of the catheter 30. Specifically, the operation amount sensor 33 detects the operation amount such as the rotation amount of the catheter 30 and the inserted length (feed amount).

  The catheter information acquisition unit 10 is a processing unit that acquires information about the catheter 30, and includes a stress measurement unit 11, a tip position measurement unit 12, and an operation amount measurement unit 13.

  The stress measurement unit 11 is a processing unit that measures strain information from the optical signal transmitted by the optical fiber strain sensor 31 and measures stress based on the physical property value of the optical fiber. The stress measurement unit 11 receives an optical signal from the optical fiber, and outputs the measured information (stress value and strain amount) to the image processing unit 100 as stress information.

  The distal end position measurement unit 12 is a processing unit that measures the distal end position of the catheter 30 based on the position detected by the position sensor 32 and outputs the measured result to the image processing unit 100 as distal end position information.

  The operation amount measuring unit 13 is a processing unit that measures the operation amount of the catheter 30 based on the operation amount detected by the operation amount sensor 33 and outputs the measured result to the image processing unit 100 as operation amount information.

  The image processing unit 100 is a processing unit that generates an X-ray image (X-ray fluoroscopic image) based on the X-ray image data generated by the X-ray detection unit 2, and includes a catheter information generation unit 110 and a volume data storage unit. Unit 120, calibration processing unit 130, CT image data acquisition unit 140, morphological information extraction unit 150, catheter alignment unit 160, CT image alignment unit 170, display information switching unit 180, image display And a control unit 190.

  The catheter information generation unit 110 is a processing unit that generates information related to the display of the catheter 30, and includes a CG image generation unit 111 and a load distribution information generation unit 112.

  The CG image generation unit 111 is a processing unit that generates a CG (Computer Graphics) image representing the shape of the catheter 30. Specifically, the CG image generation unit 111 generates CG image data representing the load measurement range of the catheter 30 (hereinafter referred to as “catheter CG”) based on the tip position information output from the tip position measurement unit 12. Is generated.

  6 and 7 are diagrams (1) and (2) for explaining the generation of the catheter CG by the CG image generation unit 111. FIG. As shown in the figure, the CG image generation unit 111 constantly records the tip position information output from the tip position measurement unit 12, and generates line segment information representing the movement path of the catheter tip (FIG. 6 (1)). )reference). Subsequently, the CG image generation unit 111 generates point sequence information by sampling the generated line segment information at a predetermined interval (see FIG. 6B).

  The CG image generation unit 111 then moves backward in the generated point sequence information by the length of the load measurement range of the catheter 30 from the beginning (the position of the catheter tip at that time) (the catheter tip has passed in the past). Based on the point sequence included in the range up to the position returned (see (a) of FIG. 7), the thickness of the actual catheter 30 is centered on the line segment information of the movement path. Cylindrical CG image data matching the above is generated as a catheter CG (see FIG. 7B).

  At this time, the CG image generation unit 111 may further generate CG image data representing the drill range of the catheter 30 based on the length of the drill range, similarly to the load measurement range.

  The load distribution information generation unit 112 is a processing unit that generates load distribution information for displaying a color representing a load distribution on the catheter CG generated by the CG image generation unit 111. Specifically, the load distribution information generation unit 112 generates load distribution information for displaying a color representing the load distribution based on the stress information output from the stress measurement unit 11 as shown below. To do.

  FIG. 8 is a diagram for explaining the display of the load distribution on the catheter CG. As shown in FIG. 1A, the load distribution information generation unit 112 first sets locations corresponding to FBGs (diffraction elements) provided in the catheter 30 for the generated catheter CG.

  Subsequently, as shown in FIG. 2B, the load distribution information generation unit 112 responds to the direction (rotation direction) and magnitude of the stress detected by the corresponding FBG for each set location. Set a different color. For example, when the rotation direction is the direction of D1 shown in the figure, the load distribution information generation unit 112 displays black for a portion having the smallest stress value and blue for a portion having an intermediate size. When the rotation direction is the direction of D2 shown in the figure, the red color is set for the largest part, and the black color is set for the part having the smallest stress value. On the other hand, blue is set, and yellow is set for the largest portion.

  Subsequently, the load distribution information generation unit 112 generates a cross section at the position where the FBG is installed, and sets the color set for each location in each generated cross section, as shown in FIG. Further, as shown in FIG. 4 (4), the load distribution information generation unit 112 uses the interpolation method such as linear interpolation to smoothly change the color of the region between the colored sections according to the position. Interpolation is performed as described above (see (4) in the figure).

  As described above, the load distribution information generation unit 112 generates the load distribution information so that the color of each portion of the catheter CG changes according to the magnitude of the load, thereby easily setting the state of the load applied to the catheter 30. It becomes possible to grasp.

  The volume data storage unit 120 is a storage unit that stores three-dimensional CT image data captured by an X-ray CT (Computed Tomography) apparatus. The volume data storage unit 120 stores CT image data of the subject P imaged by the X-ray CT apparatus in advance.

  The calibration processing unit 130 performs processing related to the alignment between the CT image data stored in the volume data storage unit 120 and the X-ray image generated from the X-ray image data collected by the X-ray image collection unit 200. It is a processing part to perform. Specifically, the calibration processing unit 130 determines the position between the X-ray image and the CT image based on the relative positional relationship between the coordinate system in the X-ray diagnostic apparatus and the coordinate system in the X-ray CT apparatus. Matrix conversion data for matching (hereinafter referred to as “calibration data”) is generated.

  The CT image data acquisition unit 140 is a processing unit that acquires CT image data having a predetermined cardiac phase from the volume data storage unit 120. Here, the predetermined cardiac phase is assumed to be set in advance by an operator or the like, such as the end diastole, in which a phase in which an image can be easily confirmed during treatment is set.

  The morphological information extraction unit 150 is a processing unit that extracts morphological information representing the morphology of the treatment target part from the CT image data acquired by the CT image data acquisition unit 140. For example, the morphological information extraction unit 150 specifies the range of the calcification unit based on the CT value of the CT image data, and extracts the CT image data in the specified range as the morphological information. This form information includes a pixel value indicating the density of the pixel.

  The catheter positioning unit 160 is a processing unit that performs positioning of the catheter CG generated by the CG image generation unit 111 and the load distribution information generated by the load distribution information generation unit 112. Specifically, the catheter alignment unit 160 acquires the X-rays collected by the X-ray image collection unit 200 based on the adjustment amount set in the adjustment operation of the position sensor 32 performed by an operator or the like before the treatment. The catheter CG and the load distribution information are aligned so as to overlap with the X-ray image generated from the image data in the correct positional relationship.

  The CT image registration unit 170 is a processing unit that performs registration of the morphological information generated by the morphological information extraction unit 150. Specifically, the CT image alignment unit 170 is configured to generate a predetermined cardiac phase (for example, based on the calibration data generated by the calibration processing unit 130 and the timing information output from the timing information acquisition unit 20). , The morphological information is aligned so as to overlap with the X-ray image generated from the X-ray image data collected by the X-ray image acquisition unit 200 in a correct positional relationship.

  The display information switching unit 180 is a processing unit that switches the image display to the image display control unit 190. Specifically, the display information switching unit 180 receives an instruction regarding switching of image display from the operator via the operation unit 8 and the like, and in response to the received instruction, the catheter CG and the load distribution to the image display control unit 190 are displayed. The display of information, form information, and load related information described later is switched. Note that the display information switching unit 180 can display all of these information simultaneously, display only one of them, or display a combination of two or more.

  The image display control unit 190 is a processing unit that combines image data such as the catheter CG, load distribution information, and morphological information, and displays the combined image data on the X-ray image. Specifically, the image display control unit 190 first generates an X-ray image in real time based on the X-ray image data sent from the X-ray image collection unit 200.

  At the same time, the image display control unit 190 synthesizes the catheter CG and the load distribution information that have been aligned by the catheter positioning unit 160 and the form information that has been positioned by the CT image positioning unit 170, The synthesized image data is superimposed on the generated X-ray image and displayed on the display unit 7.

  In addition to this, the image display control unit 190 further displays various types of load related information regarding the load applied to the catheter 30 on the X-ray image based on the stress information output from the stress measurement unit 11. 9 and 10 are views (1) and (2) showing the load related information displayed by the image display control unit 190. FIG.

  For example, as shown in FIG. 9 (1), the image display control unit 190 is a load (torque) value applied to the catheter 30, an allowable maximum value of the load (torque) applied to the catheter, the length of the load measurement range, and the like. Is displayed on the X-ray image. Here, “X” is the maximum value of the load applied to the catheter 30 (unit: N / m / m: Newton per square meter), and “Y” indicates the average value of the load applied to the catheter 30. The maximum value of the load applied to the catheter 30 is the maximum value of the load at the time of load measurement within the load measurement range, and the average value of the load applied to the catheter 30 is the time of load measurement within the load measurement range. Is the average value of the load. “Z” is an allowable maximum value of the load applied to the catheter 30 (unit: N / m / m: Newton per square meter), and “P” is the length of the load measurement range in the catheter 30. These values vary depending on the specifications of the catheter 30, and are set in advance by the operator before treatment.

  In this way, the image display control unit 190 displays information on the load applied to the catheter 30 so that the relationship between the allowable range and the current value can be understood. It becomes possible to easily grasp the operation amount that can be further added without relying on it.

  In addition, for example, as shown in FIG. 2B, the image display control unit 190, when a load exceeding a predetermined threshold is measured based on the stress information output from the stress measurement unit 11, X A warning message (letter “ALERT”) is displayed on the line image, or a mark such as an arrow is displayed at a corresponding position of the catheter CG. Alternatively, the image display control unit 190 may sound a warning buzzer in addition to displaying a warning message.

  As described above, when the load exceeding the predetermined threshold is measured, the image display control unit 190 alerts the operator clearly before the catheter 30 is broken by notifying some warning. It becomes possible.

  Alternatively, as shown in FIG. 10, when a load exceeding a predetermined threshold is measured, the image display control unit 190 may enlarge the image displayed at that time. The enlargement ratio at this time may be determined in advance or may be arbitrarily set by the operator. Even when a load exceeding a predetermined threshold is not measured, the displayed image may be enlarged when requested by the operator.

  As described above, when the load exceeding the predetermined threshold is measured, the image display control unit 190 enlarges the displayed image, and the catheter 30 reaches an unexpectedly hard part. Since the portion is automatically enlarged, it becomes possible to easily visually recognize the portion that becomes a barrier during the treatment.

  Returning to FIG. 9, for example, the image display control unit 190 displays the catheter CG combined with the load distribution information on the X-ray image, as shown in FIG. In this way, the image display control unit 190 can easily grasp the state of the load applied to the catheter 30 by generating the catheter CG so that the color changes according to the magnitude of the load. Become.

  Further, for example, the image display control unit 190 displays the calcification portion, which is morphological information, on the X-ray image as shown in FIG. Thus, when displaying a calcification part, the image display control part 190 is pixel by pixel based on the density distribution and density gradient of the pixel value contained in CT image data of the calcification part extracted as morphological information. Change the color to display. The concentration distribution represented thereby indicates the hardness distribution in the calcified portion at the same time.

  As described above, the image display control unit 190 can easily grasp the positional relationship between the treatment target part and the catheter 30 by displaying the treatment target part on the X-ray image. Moreover, when the treatment target part is a calcified part, the hardness distribution in the calcified part can be easily confirmed. In any case, information related to the load applied to the catheter 30 can be provided, and it is possible to assist the surgeon when performing a treatment that penetrates the hole in the calcified portion. .

  Note that the image display control unit 190 does not necessarily display all of the above-described load related information, but may display only those specified by the operator. In this case, the display information switching unit 180 described above receives display ON / OFF for each load related information, and controls the display of the load related information on the image display control unit 190.

  In addition to the above-described load-related information, the image display control unit 190, for example, based on the operation amount information output from the operation amount measurement unit 13, the rotation amount of the catheter 30 and the inserted length (feed Information on the operation amount, such as (amount), may be displayed. As a result, when inserting the catheter 30, the operator can easily confirm the feed amount, and when the catheter 30 is excessively loaded, the rotation amount and the feed amount can be confirmed. This improves convenience.

  Next, a processing procedure of the image processing unit 100 according to the present embodiment will be described. FIG. 11 is a flowchart illustrating the processing procedure of the image processing unit 100 according to the present embodiment. As shown in the figure, in the image processing unit 100, when treatment is started by the operator, the distal end position measuring unit 12 measures the distal end position of the catheter 30 (step S101), and the stress measuring unit 11 The stress generated in the catheter 30 is measured (step S102).

  Subsequently, the CG image generation unit 111 generates a catheter CG based on the movement path of the tip of the catheter 30 obtained from the position information measured by the tip position measurement unit 12 (step S103), and a load distribution information generation unit. 112 generates load distribution information indicating the distribution of the load applied to the catheter 30 based on the stress measured by the stress measurement unit 11 (step S104), and the catheter alignment unit 160 stores the catheter CG and the load distribution information. Position alignment is performed (step S105).

  On the other hand, the morphological information extraction unit 150 extracts morphological information indicating the configuration of the treatment target part from the CT image of the subject P captured in advance (step S106), and the CT image alignment unit 170 acquires the morphological information. Position alignment is performed (step S107).

  Then, the image display control unit 190 generates and displays an X-ray image based on the image data sent from the X-ray image collection unit 200 (step S108), and combines the generated image data into an X-ray image. The information is superimposed and displayed (step S109), and the load related information is displayed superimposed on the X-ray image (step S110).

  When a load exceeding a predetermined threshold is measured by the stress measurement unit 11 (step S111, Yes), the image display control unit 190 displays a warning message on the image (step S112), and further, The image displayed at the time is enlarged and displayed (step S113).

  As described above, in the present embodiment, in the X-ray diagnostic apparatus, at least one of the plurality of strands forming the catheter 30 is a strand capable of detecting the load applied to the catheter 30. By measuring the load applied to 30 quantitatively, it becomes possible to prevent the catheter 30 from being destroyed due to an excessive load applied.

  In the present embodiment, in the X-ray diagnostic apparatus, the distal end position measurement unit 12 measures the distal end position of the catheter 30 and the stress measurement unit 11 measures the stress generated in the catheter. Further, the CG image generation unit 111 generates a catheter CG representing the catheter 30 based on the movement path of the distal end of the catheter 30 obtained from the position measured by the distal end position measurement unit 12, and the load distribution information generation unit 112 Based on the stress measured by the stress measuring unit 11, load distribution information indicating the distribution of the load applied to the catheter 30 is generated. Then, the image display control unit 190 shows the distribution of the load applied to the catheter 30 based on the catheter CG generated by the CG image generation unit 111 and the load distribution information generated by the load distribution information generation unit 112. CG is displayed overlaid on the X-ray image. Thus, in this embodiment, a means for confirming the load applied to the catheter 30 during the operation is provided, and the destruction of the catheter 30 due to an excessive load can be prevented in advance.

  In this embodiment, the case where the present invention is applied to an X-ray diagnostic apparatus has been described. However, the present invention is not limited to this, and an image is captured in real time such as an X-ray CT apparatus or an MRI (Magnetic Resonance Imaging) apparatus. The present invention can be similarly applied to other diagnostic imaging apparatuses that can be used.

  In addition, each component of each apparatus illustrated in the present embodiment is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured.

  As described above, the catheter device and the catheter according to the present invention are useful when used for the treatment of inserting a catheter into a subject while viewing a medical image taken by an image diagnostic apparatus. It is suitable for the treatment to penetrate the hole in the calcified part.

It is a block diagram which shows the whole structure of the X-ray diagnostic apparatus which concerns on a present Example. It is a functional block diagram which shows the structure of the catheter which concerns on a present Example, a catheter information acquisition part, and an image process part. It is a figure which shows the structure of the catheter which concerns on a present Example. It is a figure which shows the principle of the optical fiber strain sensor of a FBG system. It is an image figure which shows the installation image of the optical fiber strain sensor which concerns on a present Example. It is FIG. (1) for demonstrating the production | generation of the catheter CG by a CG image production | generation part. It is FIG. (2) for demonstrating the production | generation of the catheter CG by a CG image production | generation part. It is a figure for demonstrating the display of the load distribution to the catheter CG. It is a figure (1) which shows the load related information displayed by the image display control part. It is FIG. (2) which shows the load relevant information displayed by an image display control part. It is a flowchart which shows the process sequence of the image process part which concerns on a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 X-ray generation part 2 X-ray detection part 3 Mechanism part 4 High voltage generation part 5 C arm 6 Top plate 7 Display part 8 Operation part 9 System control part 10 Catheter information acquisition part 11 Stress measurement part 12 Tip position measurement part 13 Operation Quantity measurement unit 20 Timing information acquisition unit 30 Catheter 31 Optical fiber strain sensor 32 Position sensor 33 Operation amount sensor 100 Image processing unit 110 Catheter information generation unit 111 CG image generation unit 112 Load distribution information generation unit 120 Volume data storage unit 130 Calibration Processing unit 140 CT image data acquisition unit 150 Morphological information extraction unit 160 Catheter alignment unit 170 CT image alignment unit 180 Display information switching unit 190 Image display control unit 200 X-ray image collection unit

Claims (8)

A catheter device having a catheter formed by aligning a plurality of strands in a coil shape,
At least one of the strands is a strand capable of detecting a load applied to the catheter.   The catheter device according to claim 1, wherein a strand capable of detecting a stress generated in the catheter is used as a load applied to the catheter.   The catheter apparatus according to claim 2, wherein an optical fiber strain sensor is used as the element wire capable of detecting the stress.   The optical fiber strain sensor includes a plurality of diffraction gratings provided at predetermined intervals, and is capable of detecting stress at each location where the diffraction gratings are provided. Catheter device. Load measuring means for measuring a load detected by a strand capable of detecting a load applied to the catheter;
Load information display means for displaying information on the load measured by the load measuring means;
The catheter device according to any one of claims 1 to 4, further comprising: An operation amount measuring means for measuring the operation amount of the catheter;
Operation amount information display means for displaying information on the operation amount measured by the operation amount measurement means;
The catheter device according to any one of claims 1 to 5, further comprising: A tip position measuring means for measuring the tip position of the catheter;
Tip position information display means for displaying information indicating the tip position measured by the tip position measuring means;
The catheter device according to any one of claims 1 to 6, further comprising: A catheter formed by coiling together a plurality of strands,
A catheter characterized in that at least one of the strands is a strand capable of detecting a load applied to the catheter.