CN214761137U - Slit imaging focus measuring card - Google Patents
Slit imaging focus measuring card Download PDFInfo
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- CN214761137U CN214761137U CN202120950705.5U CN202120950705U CN214761137U CN 214761137 U CN214761137 U CN 214761137U CN 202120950705 U CN202120950705 U CN 202120950705U CN 214761137 U CN214761137 U CN 214761137U
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- 238000005259 measurement Methods 0.000 claims abstract description 42
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Abstract
The utility model discloses a slit formation of image focus measuring card, including measuring the card body, seted up slit and locating hole on the measurement card body, the slit has a plurality ofly, and a plurality of slit evenly distributed just are located the slit both sides in the middle of the centre on measuring the card body and all are provided with at least one locating hole. The utility model belongs to the technical field of detection device, the utility model aims to solve the problem that measuring device measurement effect is not good among the prior art. The technical effects achieved are as follows: the measuring card realizes a better measuring effect through the arrangement of the multiple slits.
Description
Technical Field
The utility model relates to a detection device technical field, concretely relates to slit formation of image focus measuring card.
Background
The traditional focus measurement method comprises a single-hole imaging method, a single-slit imaging method and a star card measurement method:
the star card measurement method uses single-drug film X-ray glue and darkroom chemical processing method; in the X-ray digital imaging era, the imaging plate is not suitable for micro-focus imaging measurement due to high contrast resolution.
The single-hole focus measurement is only practical in a laboratory due to complex process and has standards, and the usable product is difficult to see due to the difficulty in realizing ray center alignment.
The automatic single-slit focus measurement is of foreign and domestic products, and the field measurement of the hospital X-ray equipment is feasible; but often measurement failures or excessive deviations occur because no good ray-to-center solution is provided. And the measurement process does not display an image.
For the purpose of the above-described measurement method and measurement of the focal point size, the X-ray focal point characteristics and the radiation distribution characteristics cannot be obtained.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a slit formation of image focus measuring card to solve the above-mentioned problem among the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
according to the utility model discloses an aspect, a slit formation of image focus measuring card, including the measuring card body, seted up slit and locating hole on the measuring card body, the slit has a plurality ofly, and a plurality of slits evenly distributed just are located the slit both sides in the centre on the measuring card body and all are provided with at least one locating hole.
Further, the shape of the slit is rectangular.
Further, the width of the slit ranges from any value between 0.005mm and 0.1 mm.
Further, the distance between the slit and its adjacent slit ranges from any value between 2mm and 20 mm.
Further, the shape of the positioning hole is one of a circle, a rectangle, a parallelogram or an ellipse.
Further, the shape of the positioning hole is circular, and the diameter of the positioning hole ranges from any value between 0.02mm and 0.3 mm.
Further, the thickness of the measurement card body ranges from any value between 0.02mm to 0.25 mm.
Further, the plurality of slits are parallel to each other.
Further, the measuring card body is made of metal.
The utility model has the advantages of as follows: the measurement card realizes the following functions through the arrangement of a plurality of slits, namely, the first function of displaying the bilateral effect of the characteristics of the main and auxiliary focal points of the rays; secondly, displaying the anode effect of the reflecting target X-ray tube in the long axis direction, wherein the slit of the effective focus at the anode end is narrow and small, and the slit of the effective focus at the cathode end is wide; and thirdly, the multi-slit imaging focus measuring card can not only display the X-ray distribution characteristics, but also the X-ray tube focus characteristics. In addition, the measuring card can solve the technical difficulties that the central line of the effective focus X-ray vertically passes through the center of the slit positioned in the middle of the measuring card and vertically reaches the X-ray digital imaging plate under the condition of an auxiliary scheme, thereby realizing the function of accurately measuring the focus of the X-ray tube on site.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a first view of a slit imaging focus measurement card according to some embodiments of the present invention.
Fig. 2 is a second view of a slit imaging focus measurement card according to some embodiments of the present invention.
In the figure: 1. the measuring card comprises a measuring card body, 2, a slit, 3, a frame, 4 and a positioning hole.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2, the utility model discloses a slit formation of image focus measuring card in the embodiment of the first aspect, including measuring card body 1, having seted up slit 2 and locating hole 4 on measuring card body 1, slit 2 has a plurality ofly, and a plurality of slits 2 evenly distributed just are located slit 2 both sides in the middle of the centre on measuring card body 1 all are provided with at least one locating hole 4.
In the above embodiment, it should be noted that the positioning hole 4 has a rectangular shape, a circular shape, or the like.
The technical effects achieved by the above embodiment are as follows: the measurement card realizes the following functions through the arrangement of the plurality of slits 2, namely, the first function of displaying the bilateral effect of the main and auxiliary focus characteristics of the rays; secondly, displaying the anode effect of the reflecting target X-ray tube in the long axis direction, wherein the slit of the effective focus at the anode end is narrow and small, and the slit of the effective focus at the cathode end is wide; and thirdly, the multi-slit imaging focus measuring card can not only display the X-ray distribution characteristics, but also the X-ray tube focus characteristics. In addition, the measuring card can solve the technical difficulties that the central line of the effective focus X-ray vertically passes through the center of the slit 2 positioned in the middle of the measuring card and vertically reaches the X-ray digital imaging plate under the condition of an auxiliary scheme, thereby realizing the function of accurately measuring the focus of the X-ray tube on site.
Specifically, when the measuring card uses the original equipment to simulate lamplight to position central rays, accurate measurement of the focal size of the X-ray tube can be still realized through mathematical operation by knowing the information of the anode inclination angle, the amplification factor, the distance, the lower seam spacing of the multi-slit plate and the like of the X-ray tube.
Further, the measuring card further comprises a frame 3, and the frame 3 is arranged on the outer periphery side of the measuring card body 1.
Alternatively, as shown in fig. 1-2, in some embodiments, the shape of the slit 2 is rectangular.
In the above alternative embodiment, it should be noted that the longitudinal extensions of the plurality of slits 2 are parallel to each other.
The beneficial effects of the above alternative embodiment are: the rectangular slot 2 can be processed conveniently.
Alternatively, as shown in fig. 1-2, in some embodiments, the width of the slit 2 ranges anywhere between 0.005mm and 0.1 mm.
In the above alternative embodiment, it should be noted that the width of the slit 2 is preferably 0.05 mm.
The beneficial effects of the above alternative embodiment are: the setting of such a width range of the slit 2 is the case where the focus measurement effect is the best.
Alternatively, as shown in fig. 1 to 2, in some embodiments, the distance between a slit 2 and its adjacent slit 2 ranges from any value between 2mm and 20 mm.
In the above alternative embodiment, it should be noted that, specifically, the distance between the slit 2 and the slit 2 adjacent to the slit is 5 mm.
The beneficial effects of the above alternative embodiment are: the distance range between the slit 2 and the adjacent slit 2 is set to ensure the use effect and reduce the processing difficulty as much as possible.
Alternatively, as shown in fig. 1-2, in some embodiments, the shape of the positioning hole 4 is one of circular, rectangular, parallelogram, or oval.
In the above alternative embodiment, it should be noted that, preferably, the shape of the positioning hole 4 is circular.
The beneficial effects of the above alternative embodiment are: the arrangement of the positioning hole 4 can ensure that the position of the measuring card can be accurately determined when the measuring card is used for easily and repeatedly measuring.
Alternatively, as shown in fig. 1 to 2, in some embodiments, the shape of the positioning hole 4 is a circle, and the diameter of the positioning hole 4 ranges from any value between 0.02mm to 0.3 mm.
In the above alternative embodiment, it should be noted that, preferably, the diameter of the positioning hole 4 is 0.3 mm.
The beneficial effects of the above alternative embodiment are: the size and shape of the positioning hole 4 are limited to ensure the use effect of the measuring card, and simultaneously, the central position of the measuring slit can be determined and easily identified by the connecting line of the positioning hole of the measuring card.
Alternatively, as shown in fig. 1 to 2, in some embodiments, the thickness of the measurement card body 1 ranges anywhere from 0.02mm to 0.25 mm.
In the above alternative embodiment, it should be noted that, preferably, the thickness of the measurement card body 1 is 0.05 mm.
The beneficial effects of the above alternative embodiment are: the influence of the geometric penumbra on the image measurement accuracy is reduced by setting the thickness range of the measuring card body 1.
Alternatively, as shown in fig. 1 to 2, in some embodiments, a plurality of the slits (2) are parallel to each other.
The beneficial effects of the above alternative embodiment are: whether this measurement card centering can audio-visually be seen through setting up of cross scale mark, and then reduced the degree of difficulty that this measurement card used.
Alternatively, as shown in fig. 1 to 2, in some embodiments, the plurality of slits 2 are parallel to each other.
In the above alternative embodiment, it should be noted that, preferably, the measurement card body 1 is made of high atomic description metal.
Preferably, the measuring card body 1 is made of metal foil.
The beneficial effects of the above alternative embodiment are: the foil can reduce the penumbra image generated by the ray penetrating the metal layer, thereby ensuring the precision of slit width measurement.
According to a second aspect of the present invention, a method for measuring a slit imaging focus measurement card, using a slit imaging focus measurement card according to an embodiment of the first aspect of the present invention, comprises the following steps:
step 1: the DR image receiving plate is placed on a platform below the examination bed or the special bracket, and the central line of the ray simulation irradiation field is adjusted to be aligned with the center of the image receiving plate; then, the image receiving plate or the bracket platform is adjusted by using the bidirectional digital display level meter to enable the image receiving plate to reach the level;
step 2: placing a collimation degree measuring plate on the surface of the image receiving plate, keeping the center of the collimation degree measuring plate consistent with that of the image receiving plate, and extruding and fixing the collimation degree measuring plate for replacing a measuring card to repeat a result; then, placing a wire harness collimation detection cylinder at the center of the collimation degree measurement plate, and aligning a steel bead below the detection cylinder with the center of the collimation degree measurement plate;
and step 3: adjusting the irradiation conditions of the diagnostic X-ray DR equipment, and performing first ray irradiation; observing whether the upper steel ball and the lower steel ball of the image detection cylinder are overlapped after irradiation, if the estimation of the non-overlapping reference deviation and the whole scale move the image receiving plate, then carrying out secondary ray irradiation, and repeating the inspection and the execution until the upper steel ball and the lower steel ball of the collimation cylinder are overlapped;
and 4, step 4: loading the multi-slit imaging measuring card to the central position of a horizontal frame of a support platform or an output port of a ray beam splitter, adjusting the position of the measuring card, irradiating rays, and observing whether the connecting line of two positioning holes on the measuring card body 1 in an image and the slit intersection point positioned in the center are superposed with the central points of the collimation plate and the detection cylinder; if the alignment plate and the detection cylinder are not coincident, the reference deviation degree is adjusted, the measurement card is clamped at the position of the horizontal support and the ray irradiation is carried out again, and whether the connection line of the two positioning holes in the image and the slit intersection point positioned at the center are coincident with the center points of the alignment plate and the detection cylinder or not is continuously observed; until the connecting line of the two positioning holes and the slit intersection point positioned in the center coincide with the centers of the collimation plate and the detection cylinder;
and 5: removing the collimation degree measuring plate and the image detection cylinder, and carrying out measurement card photography;
step 6: resetting the collimation degree measuring plate and the image detecting cylinder, horizontally rotating the slit imaging focus measuring card by 90 degrees, and repeating the step 4 and the step 5;
and 7: observing and copying two Dicom format images;
and 8: measuring the width of a slit at the intersection of the connecting line of the slit at the center and the two positioning holes in the major axis direction and the minor axis direction respectively by using image processing software; dividing by the magnification to obtain the effective focal size in the major axis direction and the minor axis direction respectively;
and step 9: the effective focal size in the long axis and short axis directions is obtained by measuring the long axis and short axis directions of the image with DR system image and software, and dividing by the magnification factor.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
Claims (9)
1. The utility model provides a slit formation of image focus measuring card, its characterized in that, includes measurement card body (1), slit (2) and locating hole (4) have been seted up on measurement card body (1), slit (2) have a plurality ofly, and are a plurality of slit (2) evenly distributed is in on measurement card body (1) and be located the centre slit (2) both sides all are provided with at least one locating hole (4).
2. A slit imaging focus measurement card according to claim 1, characterized in that the slit (2) is rectangular in shape.
3. A slit imaging focus measurement card according to claim 2, characterized in that the width of the slit (2) ranges anywhere from 0.005mm to 0.1 mm.
4. A slit imaging focus measurement card according to claim 1, characterized in that the distance between the slit (2) and the slit (2) adjacent thereto ranges from any value between 2mm and 20 mm.
5. A slit imaging focus measurement card according to claim 1, wherein the positioning hole (4) has a shape of one of a circle, a rectangle, a parallelogram, or an ellipse.
6. A slit imaging focus measurement card according to claim 5, characterized in that the positioning hole (4) is circular in shape, and the diameter of the positioning hole (4) ranges from any value between 0.02mm to 0.1 mm.
7. A slit imaging focus measurement card according to claim 1, characterized in that the thickness of the measurement card body (1) ranges anywhere from 0.02mm to 0.25 mm.
8. A slit imaging focus measurement card according to claim 1, characterized in that a plurality of said slits (2) are parallel to each other.
9. A slit imaging focus measurement card according to claim 1, characterized in that the measurement card body (1) is made of metal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120950705.5U CN214761137U (en) | 2021-05-06 | 2021-05-06 | Slit imaging focus measuring card |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120950705.5U CN214761137U (en) | 2021-05-06 | 2021-05-06 | Slit imaging focus measuring card |
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| CN214761137U true CN214761137U (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113143302A (en) * | 2021-05-06 | 2021-07-23 | 中国医学科学院肿瘤医院 | Slit imaging focus measuring card and measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113143302A (en) * | 2021-05-06 | 2021-07-23 | 中国医学科学院肿瘤医院 | Slit imaging focus measuring card and measuring method |
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