Static CT (computed tomography) scanner system and scanning method thereof

Abstract

A static CT (computed tomography) scanner system comprises a power system, an X-ray source system, a detector system, a data acquisition system and a computer. The detector system is used for receiving X-ray beams emitted by the X-ray source system, the data acquisition system is connected with the detector system, the computer is connected with the data acquisition system, the power system is respectively connected with the X-ray source system, the detector system and the data acquisition system, the X-ray source system comprises a plurality of X-ray source modules based on carbon nanotubes, the X-ray source modules are evenly distributed on an annular rail, a collimator is disposed below each X-ray source module correspondingly, the detector system comprises a plurality of detector modules, the detection faces of the detector modules form a ring and are parallel to the annular rail, and the X-ray source system is capable of projecting emitted X-ray beams to the detection faces of the detector system through slits among the collimators. The static CT scanner system is simple in structure and short in run-down time.

Description

[0001] Technical field [0002] The invention belongs to the field of CT scanners. [0003] Background technique [0004] CT is widely used in clinical practice. In order to realize tomographic imaging, there are two schemes of CT currently in use. The first scheme is that the CT tube rotates around the human body to obtain projection images of the imaging object at different perspectives (see figure 1 ); The second solution is to use a large-scale special scanning electron beam X-ray tube, through the deflection coil to control the position of the electron beam bombardment of the target, and then obtain projection images of different perspectives (see figure 2 ). [0005] No matter the first scheme or the second scheme, the principle of X-ray generation is basically the same. Heating the filament, when the filament temperature reaches thousands of degrees Celsius, thermionic electrons are emitted, and the thermionic electrons are accelerated and hit the anode under the action of t...

AI Technical Summary

Problems solved by technology

The mode of thermal emission generating electrons leads to its slow start-up

When a pulsed synchronous scan (such as a scan of a specific phase of the heart rhythm) is required, it cannot turn off the electron source, but can only adjust the bias voltage to suppress the electrons from hitting the anode target, or set a mechanical gate at the ray exit, thereby increasing Sophistication of X-ray sources

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