CN111818718A - Method for prolonging service life of X-ray bulb tube filament - Google Patents
Method for prolonging service life of X-ray bulb tube filament Download PDFInfo
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- CN111818718A CN111818718A CN202010803946.7A CN202010803946A CN111818718A CN 111818718 A CN111818718 A CN 111818718A CN 202010803946 A CN202010803946 A CN 202010803946A CN 111818718 A CN111818718 A CN 111818718A
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- tube
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- tube current
- exposure
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- 238000000034 method Methods 0.000 claims description 9
- 230000002035 prolonged effect Effects 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000002601 radiography Methods 0.000 description 2
- 210000003625 skull Anatomy 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000002583 angiography Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 230000002496 gastric effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/26—Measuring, controlling or protecting
- H05G1/54—Protecting or lifetime prediction
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/02—Constructional details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05G—X-RAY TECHNIQUE
- H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
- H05G1/08—Electrical details
- H05G1/26—Measuring, controlling or protecting
- H05G1/30—Controlling
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- X-Ray Techniques (AREA)
Abstract
The invention discloses a method for prolonging the service life of a filament of an X-ray bulb tube, which is characterized in that under the condition of the same ray dosage, the exposure voltage is kept unchanged, the tube current is reduced, the exposure time is prolonged, and the tube current is reduced by 42.9-83.3% according to different parts of a body to be detected; or in the range satisfying the radiation dose, the tube current and the exposure time are reduced while the exposure voltage is increased, namely, the product of the tube current and the exposure time is reduced by 50% while the exposure voltage is increased by 15%.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a method for prolonging the service life of a filament of an X-ray bulb tube.
Background
X-rays are widely used in modern medical imaging equipment, such as tomographic CT, gastrointestinal machine, digital radiography DR machine, angiography machine, small C-arm machine, breast machine, dental machine, etc. The core component of these imaging devices is the X-ray emitting assembly, known as the X-ray tube. The X-ray bulb tube consists of an anode, a cathode, a glass shell, insulating oil and a metal shell. The cathode is used for emitting electrons, under a very high electric field, the electrons bombard the target surface of the anode at a high speed, most of the electrons are converted into heat and are conducted out through the anode, and a part of the electrons become X rays.
The core of the cathode is a filament made of tungsten wires, when current passes through the tungsten wires, the temperature of the filament rises, the larger the current is, the higher the temperature of the filament is, the more electrons are emitted, and the more X rays are emitted by the X-ray bulb tube. Generally, the higher the filament temperature, the faster the tungsten element of the filament volatilizes, and the faster the filament ages. If the filament current rises 5% above the rated value, the filament life is doubled.
In the prior art, in order to reduce motion artifacts occurring during exposure, a high voltage generator adopts a drop load exposure mode, and the drop load exposure mode is to always adopt the maximum tube current of a bulb, namely the maximum filament temperature, corresponding to different exposure voltages so as to expect to complete exposure in the shortest time. This mode is very damaging to the X-ray tube and the tube life is getting shorter and shorter.
The X-ray bulb tube is a core component of imaging equipment, is expensive and is an easily-consumed product, the use cost of hospital equipment is increased by replacing the X-ray bulb tube, the cost of hospitalized patients is increased, and in addition, a large amount of resources and energy resources are consumed for producing a new X-ray bulb tube, so that the economical society is not favorably constructed.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for prolonging the service life of a filament of an X-ray bulb tube.
The technical scheme of the invention is as follows:
a method for prolonging the service life of a filament of an X-ray bulb tube is characterized in that under the condition of the same ray dose, the exposure voltage is kept unchanged, the tube current is reduced, the exposure time is prolonged, and the tube current is reduced by 42.9% -83.3% according to different parts of a body to be detected; or in the range satisfying the radiation dose, the tube current and the exposure time are reduced while the exposure voltage is increased, namely, the product of the tube current and the exposure time is reduced by 50% while the exposure voltage is increased by 15%.
The ray dose is the product of the tube voltage, the tube current and the exposure time.
The reduction amplitude of the tube current is determined according to the thicknesses of different parts of a human body, and the reduction amplitude of the tube current of the part with the thicker part of the human body is smaller than that of the part with the thinner part of the human body.
The invention has the beneficial effects that:
1. the tube current of the X-ray bulb tube exposure is reasonably adjusted to reduce the current of the filament, reduce the temperature of the filament, prolong the service life of the filament of the bulb tube and prolong the service life of the bulb tube.
Detailed Description
The present invention is further described below.
According to the method for prolonging the service life of the filament of the X-ray bulb tube, under the condition of the same ray dose, the exposure voltage is kept unchanged, the tube current is reduced, the exposure time is prolonged, and the tube current is reduced by 42.9% -83.3% according to different parts of a body to be detected; or in the range satisfying the radiation dose, the tube current and the exposure time are reduced while the exposure voltage is increased, namely, the product of the tube current and the exposure time is reduced by 50% while the exposure voltage is increased by 15%.
The ray dose is the product of the tube voltage, the tube current and the exposure time.
The reduction amplitude of the tube current is determined according to the thicknesses of different parts of a human body, and the reduction amplitude of the tube current of the part with the thicker part of the human body is smaller than that of the part with the thinner part of the human body.
The basis for reducing the tube current is to change according to the thickness of the human body, because the thickness of the human body is different, the dosage required to be exposed is different, the dosage required for the thicker parts of the human body, such as the trunk part of the human body, namely the parts of the skull, the cervical vertebra, the chest, the waist, the abdomen, the pelvic cavity and the like, is high, the corresponding exposure milliampere second, namely the product of the tube current and the exposure time is high, therefore, the tube current cannot be reduced too much, if the tube current is reduced too much, the exposure time millisecond is too long, and the human body movement or breathing artifact is easy to appear; the tube current at these thick portions is usually reduced from 800 mA to 300-400 mA at the time of original falling load, the tube current at the thickest lumbar portion is reduced to 400 mA, and the tube current at the skull is reduced to 300 mA.
The dosage required by thinner parts of the human body, such as the four limbs of the human body, namely thighs, calves, arms, palms and the like, is low, the corresponding current of the exposure tube is low, and the tube current can be reduced more. The tube current of the thin parts can be reduced to 100-300 milliamperes from 600 milliamperes when the load is dropped, for example, the thigh part is reduced to 300 milliamperes, and the palm part is reduced to 100 milliamperes.
Taking a 65 kw bulb or a high voltage generator of a digital radiography DR machine as an example, with a constant radiation dose, the reasonable tube currents that can be selected for different parts of the body in relation to a drop load are tabulated in table 1 below.
From the data in table 1, it can be seen that the tube current can be reduced by 42.9% at the minimum and 83.3% at the maximum under different radiation doses.
The following experiments verify that the service life of the X-ray bulb tube can be prolonged by reducing the tube current, and the experiment method 1 comprises the following steps: different constant currents are loaded to the bulb tube filament all the time, so that the filament is always in a high-temperature state until the filament is aged and disconnected. The large focus filament of the X-ray bulb tube is respectively loaded and tested by 6 amperes and 5 amperes current; the small focal filament of the X-ray tube was tested with a current load of 6.5 amps and 5.5 amps, respectively, and the experimental data are shown in table 2.
As can be seen from table 2, the large focus filament current is reduced by about 16.7%, and the life of the filament is extended by about 71.6 times; the small focus filament current is reduced by about 15.4%, and the life of the filament is extended by about 31 times. The current of the filament is reduced, namely the tube current is reduced, so that the service life of the filament can be greatly prolonged, namely the service life of the X-ray bulb tube is prolonged.
Experimental method 2: under the condition of the same exposure voltage, respectively exposing by using tube currents of 1 milliampere and 5 milliampere until the filament is aged and disconnected, and as a result, the service life of the X-ray bulb tube exposed by using the tube current of 1 milliampere to 5 milliampere is 21 times longer; the experimental data are shown in table 3.
The data in table 2 show that the tube current for exposure is reduced, the current of the filament is reduced, and the service life of the filament, that is, the service life of the X-ray tube, can be greatly prolonged.
In summary, the tube current of the exposure of the X-ray tube is reasonably reduced, so that the current of the filament is reduced, the temperature of the filament is reduced, the service life of the filament of the tube can be prolonged, and the service life of the tube is prolonged. When can avoid adopting the load exposure mode that falls, correspond different exposure voltage and always adopt the biggest pipe current to expect to accomplish the exposure in the shortest time, lead the problem of bulb filament that the filament temperature is in maximum temperature, easy loss always.
Claims (3)
1. A method for prolonging the service life of a filament of an X-ray bulb tube is characterized in that: under the same radiation dose condition, the exposure voltage is kept unchanged, the tube current is reduced, the exposure time is prolonged, and the tube current is reduced by 42.9-83.3% according to different parts of a body to be detected; or in the range satisfying the radiation dose, the tube current and the exposure time are reduced while the exposure voltage is increased, namely, the product of the tube current and the exposure time is reduced by 50% while the exposure voltage is increased by 15%.
2. The method of extending the life of an X-ray tube filament of claim 1, wherein: the ray dose is the product of the tube voltage, the tube current and the exposure time.
3. The method of extending the life of an X-ray tube filament of claim 1, wherein: the reduction amplitude of the tube current is determined according to the thicknesses of different parts of a human body, and the reduction amplitude of the tube current of the part with the thicker part of the human body is smaller than that of the part with the thinner part of the human body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010803946.7A CN111818718A (en) | 2020-08-11 | 2020-08-11 | Method for prolonging service life of X-ray bulb tube filament |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010803946.7A CN111818718A (en) | 2020-08-11 | 2020-08-11 | Method for prolonging service life of X-ray bulb tube filament |
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| CN111818718A true CN111818718A (en) | 2020-10-23 |
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| CN202010803946.7A Pending CN111818718A (en) | 2020-08-11 | 2020-08-11 | Method for prolonging service life of X-ray bulb tube filament |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986299A (en) * | 2021-02-20 | 2021-06-18 | 广东韶钢松山股份有限公司 | Method for prolonging service life of X-ray fluorescence instrument light tube |
Citations (7)
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|---|---|---|---|---|
| DE2918353A1 (en) * | 1979-05-07 | 1980-11-20 | Siemens Ag | X-RAY DIAGNOSTIC SYSTEM WITH MEANS FOR THE FIXED DEFINITION OF RECORDING TIME, X-RAY TUBE VOLTAGE AND MAS PRODUCT |
| CN202143287U (en) * | 2011-06-02 | 2012-02-08 | 赵建国 | X-ray exposure control device and X-ray exposure system |
| CN104302081A (en) * | 2014-09-24 | 2015-01-21 | 沈阳东软医疗系统有限公司 | Method and device for controlling filament current in CT bulb tube |
| CN107303184A (en) * | 2016-04-22 | 2017-10-31 | 上海联影医疗科技有限公司 | CT scan x-ray source tube current modulator approach and computed tomographic apparatus |
| CN109103060A (en) * | 2018-07-23 | 2018-12-28 | 健康力（北京）医疗科技有限公司 | A kind of method of extension of service life for CT tubes |
| CN110432917A (en) * | 2018-05-04 | 2019-11-12 | 上海西门子医疗器械有限公司 | Exposure dose modification method and equipment, storage medium and X-ray medical system |
| CN111134703A (en) * | 2020-01-20 | 2020-05-12 | 飞瑞医疗器械(嘉兴)有限公司 | X-ray DAP calculation method, device, equipment, medium and beam limiter |
-
2020
- 2020-08-11 CN CN202010803946.7A patent/CN111818718A/en active Pending
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| DE2918353A1 (en) * | 1979-05-07 | 1980-11-20 | Siemens Ag | X-RAY DIAGNOSTIC SYSTEM WITH MEANS FOR THE FIXED DEFINITION OF RECORDING TIME, X-RAY TUBE VOLTAGE AND MAS PRODUCT |
| CN202143287U (en) * | 2011-06-02 | 2012-02-08 | 赵建国 | X-ray exposure control device and X-ray exposure system |
| CN104302081A (en) * | 2014-09-24 | 2015-01-21 | 沈阳东软医疗系统有限公司 | Method and device for controlling filament current in CT bulb tube |
| CN107303184A (en) * | 2016-04-22 | 2017-10-31 | 上海联影医疗科技有限公司 | CT scan x-ray source tube current modulator approach and computed tomographic apparatus |
| CN110432917A (en) * | 2018-05-04 | 2019-11-12 | 上海西门子医疗器械有限公司 | Exposure dose modification method and equipment, storage medium and X-ray medical system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986299A (en) * | 2021-02-20 | 2021-06-18 | 广东韶钢松山股份有限公司 | Method for prolonging service life of X-ray fluorescence instrument light tube |
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Application publication date: 20201023 |