Temperature control system and method for detector system of multi-layer X-ray CT system

Abstract

The invention discloses a temperature control system and method for a detector system of a multi-layer X-ray CT system. The system comprises a cavity, a detector array, a main control unit, temperature sensors and a fan, wherein the detector array, the main control unit, the temperature sensors and the fan are arranged in the cavity. The system is characterized in that the temperature sensors are distributed on the detector array, and the main control unit receives output values of the temperature sensors and controls the sampling frequency of the detector array and the working mode of the fan. In each working cycle, the output values of the temperature sensors are detected, the intermediate value or the average value of the temperature sensors is taken and compared with a target temperature of temperature control, the sampling frequency of the detector array is adjusted to increase or decrease the heat productivity of the detector array according to a comparison result, and meanwhile the working mode of the fan is controlled to achieve temperature control over the detector system. According to the temperature control system and method for the detector system of the multi-layer X-ray CT system, the detection temperature can accurately reflect the working temperature of a chip, a special heating system does not need to be additionally introduced, and thus the production cost of the detector system is lowered.

Description

technical field [0001] The invention relates to a detector system of a multi-layer X-ray CT system, in particular to a temperature control system and a temperature control method for the detector system. Background technique [0002] In an X-ray CT system, X-rays are used to image parts of a subject or the internal structure and properties of an object. The imaging is realized by an X-ray CT system, which uses X-rays to image internal structures and characteristics to form a set of thin-layer plane slices or a 3D image of a region of an object. For medical applications, the object to be imaged includes the human body. [0003] An X-ray CT system usually includes an X-ray source providing a cone-shaped X-ray beam, and a group of closely arranged X-ray detector arrays facing the X-ray source. The X-ray source and X-ray detector system are mounted on an annular cradle, and the patient to be imaged by the CT system typically rests on a suitable support pad and is positioned wi...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned device can control the working temperature, but it has the following defects: 1. The temperature sensor only collects the temperature at several points in the closed cavity, and cannot truly reflect the working temperature of the detector module at different positions; 3. The temperature of the detector is indirectly controlled by controlling the temperature of the cavity, and the control accuracy is not high enough

Although it is possible to balance the temperature distribution in the chamber by adding a fan and to cool it down when needed, the above defects still cannot be overcome.

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