CN113804708A - Method for testing shielding performance of X-ray shielding material - Google Patents
Method for testing shielding performance of X-ray shielding material Download PDFInfo
- Publication number
- CN113804708A CN113804708A CN202111000064.8A CN202111000064A CN113804708A CN 113804708 A CN113804708 A CN 113804708A CN 202111000064 A CN202111000064 A CN 202111000064A CN 113804708 A CN113804708 A CN 113804708A
- Authority
- CN
- China
- Prior art keywords
- ray
- shielding material
- ray shielding
- testing
- performance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
Abstract
The invention discloses a method for testing shielding performance of an X-ray shielding material, which belongs to the technical field of performance testing of shielding materials and comprises the following steps: the X-ray shielding material and the lead plates with different thicknesses are irradiated by using hospital X-ray photography (DR) equipment to obtain an image, the whiteness of the X-ray shielding material and the lead plates in the image is analyzed and compared, and the obtained value of the whiteness is equal to or slightly greater than 1, so that the X-ray shielding material can achieve the same shielding effect as the lead plates, and the thickness of the lead plates is equal to the lead equivalent of the X-ray shielding material. The testing method is simple and convenient to use, can be used for rapidly identifying the shielding performance of the X-ray shielding material, and is beneficial to the promotion and research of experiments.
Description
Technical Field
The invention belongs to the technical field of performance test of shielding materials, and particularly relates to a method for testing shielding performance of an X-ray shielding material.
Background
The X-ray is applied to medical diagnosis and treatment, industrial flaw detection, element analysis and the like due to the unique characteristics, and brings convenience to the life of people. However, since X-rays have strong penetrating power, when people receive overdose of radiation or are in a radiation environment for a long time, serious damage can be caused to human bodies. Therefore, an X-ray shielding material is required to shield X-rays harmful to the relevant practitioner. Development of X-ray shielding materials, the testing of shielding properties thereof, is inevitable.
The current main testing means is composed of an X-ray machine and a current integrating dosimeter. However, when the shielding performance of the X-ray shielding material is tested under a high energy condition, the X-ray is harmful to the human body, and the test is performed in an isolation room with a shielding function, which brings great inconvenience. Therefore, the existing resources of hospitals are utilized to cooperate with the hospitals to test the shielding performance of the X-ray shielding material in practical application, the shielding performance of the X-ray shielding material can be intuitively and simply judged, and the experimental process is effectively promoted.
Disclosure of Invention
Aiming at the defect and the problem that the shielding performance of the X-ray shielding material is difficult to test in the prior art, the invention aims to provide a method for testing the shielding performance of the X-ray shielding material.
The invention is realized by the following technical scheme:
a method for testing shielding performance of X-ray shielding material comprises placing X-ray shielding material and lead plates with different thicknesses in diagnostic region of X-ray diagnostic equipment, and changing X-ray energy by computer to obtain corresponding medical image; and analyzing and comparing the whiteness of the X-ray shielding material and the lead plate in the images corresponding to different energies to obtain the thickness of the lead plate effect, namely the lead equivalent, of the X-ray shielding material in the energy range.
When the X-ray interacts with the substance, on one hand, energy is continuously lost, and on the other hand, the substance absorbs the energy of the X-ray to ionize or excite electrons on the outer layer of the atomic nucleus, which is the basis of X-ray detection. The kerma is the quotient of the initial sum of kinetic energies dEtr of all secondary electrons released by the interaction of the uncharged electro-particles in the mass dm of the substance divided by the unit mass dm. When the defined substance is air, the measured quantity is the air kerma.
The medical X-ray diagnosis is that according to the different absorption degrees of different tissues and organs of a human body to X-rays, when a beam of X-rays with uniform intensity passes through, the internal structure information of the X-ray diagnosis presents a corresponding image according to the transmission level. Nowadays, medical X-ray diagnostic apparatuses mainly use Computed Radiography (CR), Digital Radiography (DR), and X-ray computed tomography (X-CT).
CT is to scan the layer with certain thickness of a certain part of a human body; CR and DR have X-ray sensitivity and dynamic range much larger than that of the conventional X-ray photographic equipment, so that X-ray dose in examination can be greatly reduced, but DR directly transmits digital information to an image workstation through a flat panel detector, and CR uses an IP plate; the DR apparatus is preferably used as the medical X-ray diagnostic apparatus of the present invention.
The inspection device specified in the national standard X-ray protective material shielding performance and inspection method consists of an X-ray generating device, radiation beam filtering, a diaphragm and a radiation detector; the measuring method is that the radiation detector obtains the air kerma which is not attenuated by the detected sample and is attenuated by the detected sample, and then the lead equivalent is calculated by drawing or least square method. The Digital Radiography (DR) mainly comprises a power supply assembly, a control system assembly, an X-ray bulb tube, a high-voltage system, a flat panel detector, an interface circuit, a digital system workstation, system management software and image processing function software. The core components of DR are mainly X-ray bulb tube, high-voltage system and flat panel detector, which plays a decisive role in DR imaging quality. The working principle of the device is the same as the detection principle of the shielding performance and the detection method of the national standard X-ray protective material, but a flat panel detector converts photoelectric signals into digital signals and forms X-ray digital images through the image processing of a computer.
The method uses DR equipment, places X-ray shielding materials to be tested and Pb plates with the thickness of 0.2-0.5mm in a diagnosis area of the X-ray diagnosis equipment in a classified mode according to rows or columns, obtains series of images of the X-ray shielding materials and the lead plates under different energy conditions by adjusting X-ray excitation voltage through a computer end, enables other conditions of the same material under different energy conditions to be consistent by adjusting the resolution of the images through the computer, and reduces influence factors on results; and calibrating the whiteness of the X-ray shielding material and the lead plate in the image by using Photoshop, wherein the whiteness of the X-ray shielding material is compared with the whiteness of the lead plate with different thicknesses to obtain a value, the ratio under each energy is connected to form a curve, and if the curve is 1 or slightly larger than 1, the shielding performance lead equivalent of the shielding material is equal to the thickness of the lead plate, so that the shielding performance test result of the X-ray shielding material is obtained.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts hospital X-ray photography (DR), utilizes the image imaging principle to detect the shielding performance of the X-ray shielding material, can quickly and effectively obtain the detection result, and can protect the safety of detection personnel.
(2) The invention solves the problem of building a protection room for testing the shielding performance of a specific X-ray shielding material and solves the problem of difficult testing.
Drawings
FIG. 1 is a schematic view showing the arrangement of an X-ray shielding material and a lead plate according to example 1 of the present invention;
FIG. 2 is an image of the X-ray shielding material and the lead plate of example 1 of the present invention under a condition of 60 KeV;
FIG. 3 is a graph showing whiteness ratio of a lead plate of the X-ray shielding material according to example 1 of the present invention over the entire energy range.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Experimental example 1:
1) placing the prepared X-ray shielding materials and lead plates with the thicknesses of 0.2mm, 0.3mm, 0.4mm and 0.5mm in a diagnosis area of the DR equipment according to a graph 1;
2) controlling the energy of X-rays through a computer terminal of the DR equipment to obtain images under different energy conditions, as shown in FIG. 2;
3) setting the main element conditions of each image map to be the same value through image processing function software;
4) calibrating the whiteness of the X-ray shielding material and the lead plate in the image by using Photoshop, and obtaining the ratio of the whiteness of the X-ray shielding material to the whiteness of the lead plates with different thicknesses, as shown in FIG. 3;
5) as can be seen from FIG. 3, the lead equivalent of the X-ray shielding material Z-A-2 was 0.5 mmPb.
The foregoing merely represents preferred embodiments of the invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (4)
1. A method for testing the shielding performance of an X-ray shielding material is characterized by comprising the following steps: placing an X-ray shielding material and lead plates with different thicknesses in a diagnosis area of X-ray diagnosis equipment, and changing the energy of X-rays through a computer to obtain a corresponding medical image; and analyzing and comparing the whiteness of the X-ray shielding material and the lead plate in the images corresponding to different energies to obtain the thickness of the lead plate effect, namely the lead equivalent, of the X-ray shielding material in the energy range.
2. The method for testing shielding performance of an X-ray shielding material according to claim 1, wherein the X-ray diagnostic apparatus is a DR apparatus.
3. The method for testing shielding performance of an X-ray shielding material according to claim 1, wherein: the X-ray shielding material and the lead plates with different thicknesses are placed in the diagnosis area in a classified manner according to rows or columns, and simultaneously, the test is carried out to obtain an image.
4. The method for testing shielding performance of an X-ray shielding material according to claim 1, wherein: the thickness of the lead plate is 0.2 mm-0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111000064.8A CN113804708A (en) | 2021-08-28 | 2021-08-28 | Method for testing shielding performance of X-ray shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111000064.8A CN113804708A (en) | 2021-08-28 | 2021-08-28 | Method for testing shielding performance of X-ray shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113804708A true CN113804708A (en) | 2021-12-17 |
Family
ID=78894284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111000064.8A Pending CN113804708A (en) | 2021-08-28 | 2021-08-28 | Method for testing shielding performance of X-ray shielding material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113804708A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030063704A1 (en) * | 2000-08-29 | 2003-04-03 | Philipp Lang | Methods and devices for quantitative analysis of x-ray images |
| US20100119037A1 (en) * | 2007-04-23 | 2010-05-13 | Kabushiki Kaisha Toshiba | Nondestructive identification method and nondestructive identification device |
| US20110165269A1 (en) * | 2010-01-07 | 2011-07-07 | BLoXR, LLC | Radiation Protection System |
| CN107437438A (en) * | 2010-01-07 | 2017-12-05 | Bloxr解决方案有限责任公司 | Radiation protection system |
| KR20190052502A (en) * | 2017-11-08 | 2019-05-16 | 대구가톨릭대학교산학협력단 | Evaluation of radiation shielding sheets using x-ray imaging equipment |
-
2021
- 2021-08-28 CN CN202111000064.8A patent/CN113804708A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030063704A1 (en) * | 2000-08-29 | 2003-04-03 | Philipp Lang | Methods and devices for quantitative analysis of x-ray images |
| US20100119037A1 (en) * | 2007-04-23 | 2010-05-13 | Kabushiki Kaisha Toshiba | Nondestructive identification method and nondestructive identification device |
| US20110165269A1 (en) * | 2010-01-07 | 2011-07-07 | BLoXR, LLC | Radiation Protection System |
| CN107437438A (en) * | 2010-01-07 | 2017-12-05 | Bloxr解决方案有限责任公司 | Radiation protection system |
| KR20190052502A (en) * | 2017-11-08 | 2019-05-16 | 대구가톨릭대학교산학협력단 | Evaluation of radiation shielding sheets using x-ray imaging equipment |
Non-Patent Citations (1)
| Title |
|---|
| 邢健 等: "《全国普通高等医学院校五年制临床医学专业"十三五"规划教材 医学影像学》", 30 November 2016 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rajagopal et al. | Comparison of low dose performance of photon-counting and energy integrating CT | |
| JP2006078486A (en) | Detecting apparatus for medical diagnostic equipment and medical imaging diagnostic method | |
| US20100054401A1 (en) | Method And Device For Quality Management In Mammography Apparatus | |
| Kim et al. | Development and evaluation of multi-energy PbO dosimeter for quality assurance of image-guide radiation therapy devices | |
| CN113804708A (en) | Method for testing shielding performance of X-ray shielding material | |
| CN106442579A (en) | Method for detecting on-site three-dimensional imaging of GIS center conductive member | |
| Mueller | Measurement and characterization of X-ray spot size | |
| Omar et al. | Radiation dose assessment of 64 multi-slices computed tomography scanner | |
| Sidauruk et al. | Determination of half value layer (HVL) value on x-rays radiography with using aluminum, copper and lead (Al, Cu, and Sn) attenuators | |
| CN111579567A (en) | Quantitative detection and comprehensive evaluation method of novel X-ray imaging scintillator material | |
| JP2009276285A (en) | Apparatus and method for radiation tomographic photographing | |
| JP3595845B2 (en) | Two-dimensional radiation distribution measurement method | |
| CN215687930U (en) | Collimating device for filtering low-energy rays | |
| Turner et al. | Radiation safety characteristics of the nomad™ portable x-ray system | |
| Aslamova et al. | The possibilities of the contrast improvement in fluorography image with digital processing | |
| Franco et al. | Industrial radiography and tomography based on scanning linear scintillator array | |
| Neto et al. | kVp estimate intercomparison between Unfors XI, Radcal 4075 and a new CDTN multipurpose instrument | |
| RU2218088C1 (en) | Digital diagnostic x-ray apparatus | |
| Lee et al. | A proposal for the performance evaluation of 0.5 mm lead aprons used in nuclear medicine | |
| JP2004223158A (en) | X-ray imaging method | |
| Kim | Analysis of Use Factors in CT (Computed Tomgraphy) Safety Management of High-Energy Electromagnetic Radiation | |
| DiBianca et al. | Imaging performance of a large-field kinestatic charge detector for digital radiography | |
| Niemann et al. | Assessment of dose-width products of pre-programmed exposure technique parameters in panoramic dental radiology: a comparison of methodologies | |
| Bem et al. | Quality Control Parameter Assessment of X-ray Machines Used in Hospitals within Makurdi | |
| De Souza et al. | Alpha particle radiography with the CR-39 nuclear track detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211217 |