Novel special-purpose ct device for breast based on pulsed x-ray source and its control method

Abstract

The present invention proposes a novel mammary gland-specific CT device based on a pulsed X-ray source and its control method, which is applied in the technical field of CT scanners. An X-ray tube and a flat-panel detector are provided, the X-ray tube is a grid-controlled X-ray tube, and a high-voltage generator is connected to the grid-controlled X-ray tube to control its pulse exposure; The X-ray scanning cup is arranged above the rotation center of the turntable, and the X-ray tube and the flat panel detector are separated on both sides of the scanning cup. The present invention has a short exposure time and effectively avoids the occurrence of motion artifacts; its duty cycle can be adjusted at will according to requirements, while reducing the radiation dose, it also reduces the heat dissipation pressure of the anode of the X-ray tube and prolongs the life of the X-ray tube. service life.

Description

technical field [0001] The present invention relates to the technical field of CT scanners, in particular to a new breast-specific CT device based on a pulsed X-ray source and a control method for the new breast-specific CT device based on a pulsed X-ray source. Background technique [0002] CT scanner is a kind of image diagnosis instrument commonly used in today's society, and the imaging system of existing CT scanner dedicated to breast generally is made up of X-ray tube and flat panel detector. The flat panel detector has a high intrinsic resolution and a large size, and is an ideal detector for breast CT imaging; however, due to the large number of detection units of the flat panel detector, it takes a long time to read out the data of the flat panel detector. For example, the current flat-panel detectors can only collect data from dozens of projection angles in one second, which makes it take more than ten seconds to collect data for one rotation. During the data read...

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Problems solved by technology

But there are some problems in the above scheme: first, if figure 1 The rising and falling time of the pulse waveform obtained by the mechanical rotation shown is too long, so that the single exposure time cannot be shortened very short, and it is easy to cause motion artifacts

Second, the duty cycle of the pulse cannot be adjusted casually, and a new mechanical shutter needs to be replaced to adjust the duty cycle

Third, the mechanical shutter needs to be linked with the acquisition process of the flat panel detector, which makes the implementation of the device more complicated

Fourth, the continuous operation of the X-ray tube not only increases the heat dissipation pressure of the anode of the X-ray tube, but also shortens the service life of the X-ray tube

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