Slit imaging focus measuring card and measuring method
A slit and imaging technology, which is applied in the field of slit imaging focus measurement card, can solve the problems of inaccurate ray center, lack of monitoring and evaluation of ray center line requirements, and no guidance methods and methods, etc., to achieve accurate measurement of X-ray tubes focus effect
Pending Publication Date: 2021-07-23
CANCER INST & HOSPITAL CHINESE ACADEMY OF MEDICAL SCI +1
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Problems solved by technology
The Swedish RTI Slit Camear portable slit camera directly measures the focus size with the help of DR and CR imaging systems, and abandons the image function curve measurement method. The subjective influence of the image penumbra on the selection of measurement points is inevitable and directly affects the measurement accuracy.
In addition, the portable slit camera conforms to the JJG1078-2012 standard, and the operation guide describes the requirement of aligning the centerline of the ray, and there is no guidance method and method
There is a lack of monitoring and evaluation of the requirements for the ray centerline, and the reality that the ray center is inaccurate has not been resolved
Method used
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[0040] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0041] Such as Figure 1 to Figure 2As shown, a slit imaging focus measurement card in the embodiment of the first aspect of the present invention includes a measurement card body 1, and the measurement card body 1 is provided with a slit 2 and a positioning hole 4, and there are multiple slits 2, many The slits 2 are evenly distributed on the measuring card body 1 and at least one positioning h...
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Abstract
The invention discloses a slit imaging focus measuring card and a measuring method, and belongs to the technical field of detection devices. The slit imaging focus measuring card comprises a measuring card body, a plurality of slits and positioning holes are arranged on the measuring card body, the multiple slits are uniformly distributed on the measuring card body, and at least one positioning hole is arranged on each of two sides of the slit in the middle. The measuring card and the method aim to solve the problem of poor measurement effect of a measuring device in the prior art. The measuring card has the technical effect that the measuring card realizes a better measuring effect through the arrangement of the multiple slits.
Description
technical field [0001] The invention relates to the technical field of detection devices, in particular to a slit imaging focus measurement card, and also relates to a measurement method for the slit imaging focus measurement card. Background technique [0002] There are three traditional focus measurement methods: single slit imaging method, single slit imaging method and star card measurement method: [0003] The star card measurement method uses single-drug film X-ray glue leveling and darkroom chemical processing methods; in the era of X-ray digital imaging, it is not suitable for micro-focus imaging measurement due to the high contrast and low resolution of the imaging plate. [0004] Single-slit focus measurement is only practical in laboratories due to the complexity of the process, and there are standards. Because it is difficult to achieve beam center alignment, it is difficult to see usable products. [0005] There are foreign and domestic products for automatic s...
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Login to View More IPC IPC(8): A61B6/00
CPCA61B6/58
Inventor 宋俊峰程远达卢铜锁史卓
Owner CANCER INST & HOSPITAL CHINESE ACADEMY OF MEDICAL SCI