Method and system for correcting head position in head CT image

Abstract

The invention provides a method and a system for correcting the head position in a head CT image, and the method comprises the steps: taking a CT image reconstructed after scanning as an implementation object, and correcting the head position in a reconstructed three-dimensional image; selecting key points, selecting a template image comprising the key points from a template database, and markingposition coordinates of the key points in a template image coordinate system; performing key point detection on the reconstructed CT image to obtain a detection point, and marking position coordinatesof the detection point in a reconstructed image coordinate system; and taking the position coordinates of the key points in the template image coordinate system as a reference, finding out the deviation angle of the detection point in the reconstructed image coordinate system, and correcting the reconstructed image by taking the deviation angle as a correction angle. The method can automaticallycorrect the image without manual intervention, thereby saving manpower. The speed is high, real-time calculation can be achieved, and time is saved. The correction result is accurate. A patient can move before scanning, a comfortable posture is kept, and humanization is achieved.

Description

technical field [0001] The invention relates to the technical field of post-processing of medical images, in particular to a method and system for correcting head positions in head CT images. 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, and retract the mandible so that the auditory canthus line is perpendicular to the table, and the two outer ear holes and the table, etc. distance, such as figure 1 shown. The patient's head posture needs to be fixed by the doctor or nurse through the headrest before the CT scan, and the patient needs to keep the head still during the scan. [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 positio...

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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