Quasi-phase super-resolution circuit of thoracoabdominal surface respiratory movement signals

Abstract

The invention relates to a quasi-phase super-resolution circuit of thoracoabdominal surface respiratory movement signals, and belongs to the technical fields of precision instruments and thoracoabdominal radiotherapy. The circuit comprises a signal conversion module, a phase difference multiple output module, a resistor chain multiphase generation module, a multiphase sinusoidal square wave conversion module and a multiphase fusion logic gate module; the modules are indispensable as a whole, and convert the respiratory movement signals of one cycle into quasi-phase square wave signals of multiple cycles jointly, and the null cycle of the signals is output by a super-resolution square wave with phase difference of a quasi phase; that is to say, super resolution of the thoracoabdominal surface respiratory movement signals is achieved, and further technical advantages which can be brought by the result are that in a process of multiple respiratory cycles, by judging frequency change of square wave signals, change of the respiratory frequency can be judged, and more importantly, due to the fact that the cycle of the super-resolution square wave is much smaller than the respiratory movement cycle, change of the respiratory frequency can be judged in a time range smaller than one respiratory cycle.

Description

Technical field

[0001] The invention relates to a quasi-phase super-resolution circuit for respiratory motion signals on the surface of the chest and abdomen, which belongs to the technical field of precision instruments and chest and abdomen radiotherapy. Background technique

[0002] In the process of radiotherapy for chest and abdomen tumors, breathing makes the tumor area escape the target area or normal tissues enter the target area, which not only reduces the effect of radiotherapy, but also prone to complications.

[0003] In order to solve the negative effects of breathing exercises on radiotherapy, methods such as breathing maintenance and breathing gating were first used in clinical practice to achieve tumor position control through breathing intervention. Although certain results have been achieved, the patient's tolerance is poor ; In order to improve patient tolerance and do not interfere with the patient’s breathing, a tracking system has emerged to track the location...

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