Source-image distance detecting method and device and equipment

A technology of detection equipment and detection methods, applied in medical science, equipment for radiological diagnosis, diagnosis, etc., can solve problems affecting the quality of radiographic imaging, affecting the accuracy of radiation dose assessment, and not taking into account

Pending Publication Date: 2019-10-15
NEUSOFT MEDICAL SYST CO LTD
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Problems solved by technology

This method does not take into account the fact that the spatial attitude of the projection object may not be parallel to the imaging plane of the detector, and directly uses the motion position of the projection object as a known parameter, resulting in a large error in the calculated source image distance value, which affects the Accuracy of radiation dose assessment and affects the quality of radiographic imaging

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  • Source-image distance detecting method and device and equipment
  • Source-image distance detecting method and device and equipment
  • Source-image distance detecting method and device and equipment

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[0061] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this specification. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present specification as recited in the appended claims.

[0062] see figure 1 , is a schematic diagram of an application scene of a radiation imaging system, which includes a radiation source 10 , a detector 20 , and an image processing device 30 .

[0063] Wherein, the radiation source 10 is used to emit radiation, such as X-rays, and the detector 20 is used to detect the intensity of the radiation penetrating the measured object 40 . At th...

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Abstract

The present invention discloses a source-image distance detecting method and device and equipment. The method is applied for the source-image distance detecting device in a radiographic imaging system. The system also includes a radioactive source and a detector. The method includes acquiring distance change values of the radioactive source relative to a spherical projection object or the detectorat different distances; respectively acquiring projection images of the spherical projection object on the imaging surface of the detector at different distances; and determining the source-image distance of the system according to the projection images at different distances and the distance change values. As the spherical projection object has an isotropous characteristic, a problem that spatial gesture of a projection object may be not parallel to the imaging surface of the detector is avoided; the source-image distance is determined by the distance change values so that a zero error and amechanism transmission error of a distance sensor can be avoided, thus improving accuracy of source-image distance detecting.

Description

technical field [0001] This specification relates to the technical field of medical equipment, in particular to a source image distance detection method, device and equipment. Background technique [0002] In radiography, the source image distance (Source Image Distance, SID) refers to the distance between the radiation source and the imaging plane of the detector. The source image distance is an important parameter of radiographic imaging, which directly affects the correctness of the imaging scale, and an incorrect imaging scale will affect the evaluation of the size of the lesion, and then affect the subsequent clinical diagnosis. In some radiography equipment, the source image distance can be adjusted, and the radiation dose will also be adjusted according to the source image distance. Therefore, the accuracy of the source image distance directly affects the evaluation of radiation dose. [0003] Currently, the source image distance of a radiation imaging device is usua...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/588
Inventor 王凌川李天华
Owner NEUSOFT MEDICAL SYST CO LTD
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