A method and device for eliminating eccentricity of setup
An eccentric and center-of-mass technology, applied in the medical field, can solve the problems of decreased time resolution, reduced image quality of heart scans, and increased effective dose, etc., and achieve the effect of improving the quality of scanned images, improving time resolution, and eliminating positioning eccentricity
Active Publication Date: 2017-08-25
NEUSOFT MEDICAL SYST CO LTD
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[0003] When the setup of the region of interest of the scanned human body is off-center, that is, the center of the region of interest of the scanned human body does not coincide with the rotation center of the CT scanning system, it will result in uneven scanning dose of the region of interest of the scanned human body , so that the image noise is inconsistent, while increasing the use of effective dose and reducing the effective utilization of scanning dose
In addition, when the region of interest is the heart of the human body or an area near the heart, the off-center setup will cause a decrease in time resolution, which will eventually lead to a decrease in the quality of the scanned image of the heart
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[0061] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0062] During routine CT scanning, under normal circumstances, such as image 3 As shown in , it is a schematic diagram of scanning under a certain X-ray projection angle. Wherein, the center of the scanned human body is located at the rotation center of the CT scanning system. In the X-ray fan beam passing through the shape filter, the intensity of each ray and the projection angle of the X-ray are as follows: Figure 4 shown. Since the distance traveled by the central ray in th...
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The embodiment of the present invention discloses a method and device for eliminating setup eccentricity. The method includes: calculating the vertical height difference between the center of the region of interest of the scanned human body and the rotation center of the CT scanning system; according to the vertical height difference, Adjust the vertical height of the scanning bed of the CT scanning system to eliminate setup eccentricity. The present invention adjusts the vertical height of the scanning bed when the center of the region of interest of the scanned human body does not coincide with the rotation center of the CT scanning system, eliminates the setting eccentricity, and finally improves the quality of the scanned image. In addition, when the region of interest is the heart of the human body or an area near the heart, the present invention can also eliminate the setup eccentricity, improve the time resolution, and finally improve the quality of the scanned image of the heart.
Description
technical field [0001] The invention relates to the field of medical technology, in particular to a method and a device for eliminating setup eccentricity. Background technique [0002] In conventional CT scanning, ideally, the center of the region of interest (English: region of interest, abbreviation: ROI) of the scanned body should coincide with the rotation center of the CT scanning system, that is, the setup during the CT scanning process is not eccentric . Wherein, the region of interest of the scanned human body can be selected by the user through a positioning frame in the plain image of the scanned human body. It can be the whole human body, or the entire range of a partial section selected along the Z direction of the human body, such as figure 1 As shown in , it is a schematic diagram of the selected part of the overall range of the cross-section as the region of interest. In addition, it can also be a partial range of a partial section selected along the Z dir...
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IPC IPC(8): A61B6/04A61B6/03
Inventor 楼珊珊韩俊龙谢家祥逄岭
Owner NEUSOFT MEDICAL SYST CO LTD