Self-calibration method of head moving CT detector and scanning system

Abstract

The invention relates to the field of head movement CT detection, in particular to a self-calibration method of a head movement CT detector and a scanning system.The self-calibration method comprises the following steps that S1, coordinate information of the center point of a head support where the head of a patient is located is obtained based on a film pressure sensor arranged on the head support; s2, acquiring a three-dimensional image of the head of the patient; s3, acquiring coordinate information of each boundary point of the head of the patient based on the coordinate information of the midline point and the three-dimensional image of the head of the patient; s4, acquiring central point coordinates (x0, y0, z0) of each boundary point based on the coordinate information of each boundary point; and S5, electrifying the head moving CT detector, and realizing self-calibration of the position of the detector based on the central point coordinates (x0, y0, z0). According to the invention, rapid self-calibration of the head-moving CT detector can be realized, the accuracy of a self-calibration result can be ensured, and a guarantee is provided for the quality of an obtained CT scanning image.

Description

technical field [0001] The invention relates to the field of head moving CT detection, in particular to a self-calibration method and a scanning system of a head moving CT detector. Background technique [0002] CT (Computed Tomography) is an important clinical imaging diagnostic method. The moving head CT system is a special CT scanning system developed on the basis of traditional CT. Its free-moving head CT--CereTom can realize bedside and intraoperative head CT imaging without transferring patients. While improving the efficiency of medical work, it reduces the potential risk of patients due to transfer. In the special application scenarios of head-moving CT (such as first aid or surgery), the use time is uncertain, and once it needs to be used, the time is very urgent. Basically, it is required that the head-moving CT can be turned on immediately. Scan, there can be no calibration process. However, due to the special way of use of moving head CT, it is impossible to g...

AI Technical Summary

Problems solved by technology

In the special application scenarios of head-moving CT (such as first aid or surgery), the use time is uncertain, and once it needs to be used, the time is very urgent. Basically, it is required that the head-moving CT can be turned on immediately. scan, there can be no calibration process

However, due to the particularity of its use, moving head CT cannot guarantee that the detector is always powered on and can work at any time. It is common that the system is not powered on until the system is to be used; while detector calibration is It can only be carried out after the system is powered on, so it brings more trouble and inconvenience to the application of mobile head CT

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