RU108940U1 - Test object for adjusting a linear x-ray tomograph - Google Patents

Test object for adjusting a linear x-ray tomograph Download PDF

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Publication number
RU108940U1
RU108940U1 RU2011112479/14U RU2011112479U RU108940U1 RU 108940 U1 RU108940 U1 RU 108940U1 RU 2011112479/14 U RU2011112479/14 U RU 2011112479/14U RU 2011112479 U RU2011112479 U RU 2011112479U RU 108940 U1 RU108940 U1 RU 108940U1
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RU
Russia
Prior art keywords
test object
cube
linear
ray
upper face
Prior art date
Application number
RU2011112479/14U
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Russian (ru)
Inventor
Александр Николаевич Черний
Борис Менделевич Кантер
Елена Михайловна Богородская
Геннадий Викторович Ратобыльский
Валерий Анатольевич Малов
Александр Владимирович Дмитренко
Original Assignee
Общество с ограниченной ответственностью Совместное русско-французское предприятие "СпектрАп"
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Priority to RU2011112479/14U priority Critical patent/RU108940U1/en
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Publication of RU108940U1 publication Critical patent/RU108940U1/en

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Abstract

 A test object for aligning a linear X-ray tomograph having a body made of a material containing elements with a high atomic number, characterized in that the test object has a cube shape with two square protrusions from opposite sides of its base, while in the centers of the protrusions and the upper face the cube is made through holes that are interconnected by a straight groove, while the hole of the upper face of the cube is based on the shape of a cone, the generatrix of which makes an angle φ with the vertical axis equal to value to the limiting value of the tomography angle.

Description

This technical solution relates to the section of medical equipment, namely to devices for monitoring the quality of work of medical X-ray diagnostic equipment and is intended to check the path of the emitter during alignment of a linear X-ray tomograph.

A known test object for aligning a linear X-ray tomograph containing a ruler with metric elements fixed at an angle of 40 ° -45 ° on a stand, made of hard X-ray transparent material, with a flat base (Fundamentals of X-ray diagnostic technology Edited by N.N. Blinov. - S. 360. - M .: Medicine, 2002 [1]).

The well-known test object [1] is designed to determine the depth and width of the tomographic layer and does not allow to determine the trajectory of the emitter of a linear x-ray tomograph.

The closest in design to the claimed object is a test object for aligning a linear X-ray tomograph having a housing made of a material containing elements with a high atomic number. The test object has a loop shape with three rectangular, equal and mutually parallel platforms, in the centers of which through holes are made that are in the same vertical plane (Chikirdin E.G., Mishkinis A.B. Technical encyclopedia of the radiologist. - M .: MNPI, 1996 . - p. 288 [2]).

The test object [2] is intended to check the trajectory of the emitter during alignment of the linear X-ray tomograph.

The disadvantage of the test object [2], adopted by us as a prototype, is expressed in the difficulty of determining the strict position of the vertical line on the x-ray, which is made by two shadow points, the upper and lower (Fig. 3, a). The fact is that under the action of photochemical and thermal processing of the film, its substrate deforms and the shadow points (upper and lower) located at a considerable distance from the route line shift relative to the true position, as a result of which the direction of the vertical line is distorted. This defect leads to a decrease in the accuracy of the operation, since the trajectory of the emitter is determined by the angle of inclination of the route line relative to the vertical.

The aim of this proposal is to increase the accuracy of determining the trajectory of the emitter during alignment of a linear X-ray tomograph and facilitate the work of a specialist.

This goal is achieved by the fact that in the test object for aligning a linear X-ray tomograph having a body of material containing elements with a high atomic number, with three rectangular, equal and mutually parallel sites, in the centers of which there are through holes located in one vertical plane, the casing is made in the form of a cube with two square protrusions on opposite sides of its base, while all three holes are interconnected by a straight groove, and the central hole s an in its base form of a cone, the generatrix of which forms with the vertical axis an angle φ, equal in magnitude to the limiting value of the angle tomography.

Studies on patent and scientific and technical information sources have shown that the design of the proposed test object is unknown and does not follow explicitly from the studied prior art, i.e. meets the criteria of "novelty" and "inventive step".

Further, our proposal is accompanied by drawings and explanations to them. Figure 1 shows the design of the proposed test object (top view), Figure 2 is a side view of the test object in the context of aa of Figure 1, and figure 3 shows x-ray tomographic images obtained using the prototype (Fig .3, a) and a new test object (Fig. 3, b).

The body 1 of the test object is made of a material containing elements with a high atomic number, for example tungsten, and has a cube shape with two flat protrusions 2 and 3 of a square shape on opposite sides of its base. The areas of the upper face 4 of the cube of the housing 1 and the square protrusions 2 and 3 are identical. In the centers of the protrusions 2 and 3, through holes are made, respectively, of 5 and 6 of a cylindrical shape with a diameter of 1.5-2.0 mm. The same hole 7 passes through the center of the upper face 4 of the cube of housing 1. All three holes 5, 6, 7 are interconnected by a straight groove 8 with a width of 1.5-2.0 mm, perpendicular to the base 9 of the housing 1 of the test object. The Central hole 7 is based on the shape of a cone 10, the generatrix of which forms an angle φ with the vertical axis, which is equal in magnitude to the limiting value of the tomography angle.

Tomography of the test object is performed by an X-ray emitter 11 as it moves along arrow 12 (FIG. 2). On the tomogram of the test object shows the route line 13 and the vertical line 14 is the image of the groove 8 on the x-ray film (Fig.3, b).

The trajectory of the emitter of a linear x-ray tomograph is determined by the angle between the route 13 and vertical 14 lines. In the ideal case, when the radiator of a linear X-ray tomograph moves along the longitudinal axis of the X-ray table, this angle should be equal to 90 °. The presence on the tomogram of a vertical line 14 facilitates the work of a specialist and improves the accuracy of the operation.

Claims (1)

  1. A test object for aligning a linear X-ray tomograph having a body made of a material containing elements with a high atomic number, characterized in that the test object has a cube shape with two square protrusions from opposite sides of its base, while in the centers of the protrusions and the upper face through holes are made through the cube, which are interconnected by a straight groove, while the opening of the upper face of the cube is based on a cone shape, the generatrix of which makes an angle φ with the vertical axis equal to value to the limiting value of the tomography angle.
    Figure 00000001
RU2011112479/14U 2011-04-04 2011-04-04 Test object for adjusting a linear x-ray tomograph RU108940U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2011112479/14U RU108940U1 (en) 2011-04-04 2011-04-04 Test object for adjusting a linear x-ray tomograph

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2011112479/14U RU108940U1 (en) 2011-04-04 2011-04-04 Test object for adjusting a linear x-ray tomograph

Publications (1)

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RU108940U1 true RU108940U1 (en) 2011-10-10

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RU (1) RU108940U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2607079C2 (en) * 2012-03-08 2017-01-10 Дзе Джонс Хопкинс Юниверсити Method and device for mechanical and radiation quality guarantee measurement in real time in radiation therapy
RU169813U1 (en) * 2016-11-28 2017-04-03 Общество с ограниченной ответственностью Совместное русско-французское предприятие "СпектрАп" Device for stereorengenography
RU170296U1 (en) * 2016-08-11 2017-04-19 Федеральное государственное бюджетное научное учреждение "Научно исследовательский институт медицины труда" (ФГБНУ "НИИ МТ") Test object for calibration of a digital x-ray diagnostic apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2607079C2 (en) * 2012-03-08 2017-01-10 Дзе Джонс Хопкинс Юниверсити Method and device for mechanical and radiation quality guarantee measurement in real time in radiation therapy
RU170296U1 (en) * 2016-08-11 2017-04-19 Федеральное государственное бюджетное научное учреждение "Научно исследовательский институт медицины труда" (ФГБНУ "НИИ МТ") Test object for calibration of a digital x-ray diagnostic apparatus
RU169813U1 (en) * 2016-11-28 2017-04-03 Общество с ограниченной ответственностью Совместное русско-французское предприятие "СпектрАп" Device for stereorengenography

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Effective date: 20111112