Autonomous scanning method of mobile CT system, storage medium and CT scanning device
A scanning method, CT scanning technology, applied in the field of medical imaging, can solve problems such as artifacts and geometric distortion, and achieve the effect of suppressing overlapping artifacts and streak artifacts
Active Publication Date: 2021-04-09
NANJING ANKE MEDICAL TECH CO LTD
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Problems solved by technology
If there is no precise movement of the guide rail in the mobile CT system, based on the traditional CT algorithm, it will bring serious artifacts and geometric distortion
These movements can cause severe artifacts and geometric distortion if not corrected for
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[0051]The purpose of the present invention is to reconstruct the image of the entire scanning area by using the real scanning space geometric information by automatically detecting the trajectory of the mobile CT scan. For scout scanning, during the scanning process, the gantry only moves horizontally, and the tube and detector are fixed at a given angle to translate with the gantry as a whole, such as a position of 0 degrees or 90 degrees. Since there is only horizontal movement, there is a lot of correlation between adjacent scouts. The correlation of images can be used, such as SIFT and SURF criteria commonly used in image processing, to perform image registration and position correction. In this way, a real positioning image can be obtained, and the corresponding geometric position of each positioning image scan data can be calculated, and these data can be used as template data guides to provide matching benchmarks for subsequent CT scan data.
[0052] combine figure 1 ...
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The invention relates to the technical field of CT scanning, in particular to an autonomous scanning method of a mobile CT system, a storage medium and a CT scanning device. According to the method, the correlation between adjacent positioning images is fully utilized, image registration and position correction are carried out, real positioning images are obtained, the geometric position corresponding to scanning data of each positioning image is calculated, and the data is used as template data guidance to provide a matching reference for subsequent CT scanning data; and in the CT scanning process, all projection data with a same angle as the positioning image are extracted and matched with data of the positioning images, and therefore, the geometric position of the current scanning position relative to a sickbed is calculated. According to the method, accurate movement of the mobile CT system without a special guide rail can be achieved, and CT images meeting clinical requirements are obtained.
Description
technical field [0001] The invention relates to the technical field of medical imaging, in particular to an autonomous scanning method, a storage medium and a CT scanning device of a mobile CT system. Background technique [0002] The CT medical imaging system has made great progress since its invention in the 1970s, and the scanning speed has changed from a few minutes at the beginning to 0.2 seconds now. The number of detector rows has also changed from single row and double row at the beginning to the current 64 rows, 128 rows, and even 256 rows. The change is not only the upgrade of the system hardware, but also the system's image reconstruction technology has brought about revolutionary changes. Since the initial CT system has only one row of detectors, the X-ray beam is a fan beam, and the reconstruction techniques used are also two-dimensional fan beam reconstruction techniques. Because only one layer can be scanned at a time, the entire scan takes a long time. Late...
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IPC IPC(8): A61B6/03A61B6/04
CPCA61B6/032A61B6/035A61B6/0407A61B6/5258
Inventor 曾凯冯亚崇吴小页
Owner NANJING ANKE MEDICAL TECH CO LTD