A method for correcting head position in head CT image

Abstract

The present invention proposes a method and a system for correcting the head position in a head CT image. The method takes the scanned and reconstructed CT image as the implementation object, and corrects the head position in the reconstructed three-dimensional image; the method includes steps: Select the key point, select the template image including the key point from the template database, and mark the position coordinates of the key point in the template image coordinate system; perform key point detection on the reconstructed CT image, obtain the detection point, and mark the detection point The position coordinates in the reconstructed image coordinate system; with the position coordinates of the key points in the template image coordinate system as a reference, find out the offset angle of the detection point in the reconstructed image coordinate system, and use the offset angle as the correction angle to correct the reconstructed image . The invention can automatically correct images without manual intervention, saving manpower; fast, capable of real-time calculation, saving time; accurate correction results; patients can move before scanning, maintain a more comfortable posture, and are more humane.

Description

technical field [0001] The invention relates to the technical field of medical image post-processing, in particular to a method for correcting the head position in a head CT image. Background technique [0002] In the head CT (Computed Tomography, computerized tomography) scanning process, the patient is generally required to lie supine on the examination table, place the head on the headrest, retract the mandible so that the auditory canthus line is perpendicular to the table, and the two outer ear holes are equidistant from the table ,Such as figure 1 shown. The patient's head posture needs to be fixed by the doctor or nurse through the head support before the CT scan, and the patient needs to keep the head still during the scanning process. [0003] There is following defective in prior art: [0004] 1. Doctors or nurses are required to guide the positioning of patients, which will consume a lot of labor and time; [0005] 2. During the scanning process, the head posi...

AI Technical Summary

Problems solved by technology

[0004] 1. Doctors or nurses are required to guide the positioning of patients, which will consume a lot of labor and time;

[0005] 2. During the scanning process, the head position may be shifted due to the movement of the patient;

[0006] 3. In the actual situation, it may be due to the patient's position or physical condition that the head tilts left and right or the canthus line cannot be perpendicular to the bed board

[0007] The above situations will lead to a large error between the reconstruction of the head CT scan image and the actual situation

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