Novel special mammary gland CT device based on pulse X-ray source and control method thereof

Abstract

The invention provides a novel special mammary gland CT device based on a pulse X-ray source and a control method thereof, and belongs to the field of CT scanning technology. The CT device comprises a housing, a rotary disc is movably disposed in the housing, the rotary disc is provided with an X-ray tube and a flat panel detector, the X-ray tube is a grid control X-ray tube, the grid control X-ray tube is connected with a high-voltage generator used for controlling the grid control X-ray tube to carry pulse exposure. The housing is fixedly provided with an X ray permeable scan cup, the scan cup is disposed over center of rotation of the rotary disc, and the X-ray tube and the flat panel detector are respective arranged at two sides of the scan cup. The novel special mammary gland CT device based on a pulse X-ray source is short in exposure time, motion artifact can be effectively avoided, the duty ratio can be freely adjusted according to needs, the radiation dose can be reduced while the pressure of heat dissipation of the anode of an X-ray tube is reduced, and the service life of the X-ray tube can be prolonged.

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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