X-ray image acquisition method and device

An image acquisition and X-ray technology, applied in the field of image processing, can solve problems such as injury and multi-radiation dose

Active Publication Date: 2015-01-21
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

[0004] However, when the above-mentioned method is used to photograph a large-sized part to be photographed, it may cause the subject to receive too much radiation dose, causing certain damage to it.

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  • X-ray image acquisition method and device

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Embodiment Construction

[0071] As described in the background art, when the existing technology obtains a large-scale image, it may cause the subject to receive excessive radiation dose. The inventor found that during the photography of large-scale images, after calculating the initial exposure frames for image stitching based on the pre-exposure area, if the initial exposure frames are not an integer, the doctor usually takes an integer greater than the initial exposure frames as The number of exposure frames in the actual photography process, therefore, causes the actual exposure area to be larger than the pre-exposure area, causing the subject to receive excessive radiation dose and causing certain damage to it.

[0072] The inventor considers that the calculated initial exposure frame number is adjusted accordingly to obtain the actual exposure frame number, so that the actual exposure area is not larger than the pre-exposure area, thereby reducing the radiation dose received by the subject during...

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Abstract

The invention provides an X-ray image acquisition method and device. The acquisition method includes the steps that an initial rack parameter and the overlapping region of every two adjacent frames are set according to a pre-exposure region, and an initial exposure frame number for image splicing is calculated; the initial exposure frame number is adjusted so that an actual exposure frame number can be obtained, an actual rack parameter is determined according to the actual exposure frame number so that the actual exposure region cannot be larger than the pre-exposure region, and the absolute value of the difference value between the actual exposure frame number and the initial exposure frame number is smaller than one; on the basis of the actual exposure frame number and the actual rack parameter, the corresponding detector position and a bulb tube rotating angle are calculated when each frame is acquired; exposure is performed according to the actual rack parameter and the corresponding detector position and the bulb tube rotating angle which are calculated when each frame is acquired, and therefore an image to be spliced is obtained. By the adoption of the method and device, it is avoided that a detected object receives too much doses of radiation in the shooting process.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an X-ray image acquisition method and device. Background technique [0002] It has become a widespread application to use X-ray photography system to take large-scale and large-scale images, such as shooting bone images and spine images. [0003] For now, due to the limitations of the physical characteristics of the X-ray photography system, such as the area limitation of the detector, the source image distance (SID, Source Image Distance) distance limitation, etc., when imaging a large-sized part to be photographed , usually by dividing the large-sized parts to be photographed into single photographs, the detector can meet the size requirements for sequential photography, and then use the image workstation to fuse, stitch and process the sequence images obtained by photography to obtain large-scale images. image. [0004] However, when the above-mentioned meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/542A61B6/545A61B6/587
Inventor 金香翠胡扬肖海峰陈宏伟王炜
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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