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

A breathing motion and quasi-phase technology, which is applied in X-ray/γ-ray/particle irradiation therapy, radiotherapy, treatment, etc., can solve the problem of not finding the breathing motion signal, shorten the signal analysis time, and improve the super-resolution accuracy Effect

Pending Publication Date: 2020-05-12
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this field, no technical means for super-resolution of respiratory motion signals have been found

Method used

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

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specific Embodiment approach 1

[0046] This embodiment is an embodiment of a quasi-phase super-resolution circuit for respiratory motion signals on the surface of the chest and abdomen.

[0047] The quasi-phase super-resolution circuit of the respiratory motion signal on the chest and abdomen surface, the logic block diagram is as follows figure 1 As shown, the quasi-phase super-resolution circuit of the chest and abdomen surface respiratory motion signal includes a signal conversion module, a phase difference multi-output module, a resistance chain multi-phase generation module, a multi-phase sine square wave conversion module and a multi-phase fusion logic gate module; among them, Phase difference multi-output module circuit diagram such as figure 2 As shown, the circuit diagram of the resistance chain multi-phase generation module is as follows image 3 As shown, the circuit diagram of the multi-phase sine square wave conversion module is as follows Figure 4 As shown, the circuit diagram of the multi-phase f...

specific Embodiment approach 2

[0057] This embodiment is an embodiment of a quasi-phase super-resolution method for respiratory motion signals on the chest and abdomen surfaces.

[0058] The quasi-phase super-resolution method for respiratory motion signals on the chest and abdomen surfaces is characterized in that it includes the following steps:

[0059] Step a. In the signal conversion module, the filter and amplifier whose passband frequency contains ω are used to realize the respiration motion signal f(t) whose input is periodic, and the output is:

[0060]

[0061] among them,

[0062] The filter selects the component with frequency ω to pass;

[0063] The amplifier adjusts the amplitude to

[0064] Step b. In the phase difference multi-output module, two differentiating circuits composed of resistors, capacitors and operational amplifiers are used to realize the first and second differentiations of the output cosine signal of the signal conversion module, and then realize the phase difference as tolerance π / 2...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/1048
Inventor 赵烟桥陈睿胡亚欣
Owner HARBIN UNIV OF SCI & TECH
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