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Human thoracico-abdominal surface area respiratory single-cycle prediction method in radiotherapy

A technology of breathing signal and surface area, applied in the fields of oncology, engineering technology and mathematics, and precision instruments, it can solve the problems of judgment cycle and difficulty, and achieve the effect of small calculation amount, simple function and simple method.

Active Publication Date: 2019-05-10
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, since the respiratory movement is not a simple repetition of a single period, it is difficult to judge the period by the distance of two identical eigenvalues

Method used

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  • Human thoracico-abdominal surface area respiratory single-cycle prediction method in radiotherapy
  • Human thoracico-abdominal surface area respiratory single-cycle prediction method in radiotherapy
  • Human thoracico-abdominal surface area respiratory single-cycle prediction method in radiotherapy

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specific Embodiment 1

[0074] This embodiment is an embodiment of a method for predicting the period of a respiratory signal in the surface area of ​​the chest and abdomen of a human body during radiotherapy.

[0075] In this embodiment, a method for predicting the period of the respiratory signal in the human chest and abdomen surface area during radiotherapy consists of the following steps:

[0076] Step a, constructing an ideal single-period respiratory signal;

[0077] Step b, performing period extension on the ideal single-period respiratory signal obtained in step a, to obtain an ideal multi-period respiratory signal;

[0078] Step c, carry out periodic extraction to the ideal multi-period breathing signal obtained in step b, including:

[0079] Step c1, extracting the DC component of the ideal multi-period respiratory signal obtained in step b;

[0080] Step c2, subtracting the DC component obtained in step c1 from the ideal multi-cycle respiratory signal obtained in step b;

[0081] Step ...

specific Embodiment 2

[0088] This embodiment is an embodiment of a method for predicting the period of a respiratory signal in the surface area of ​​the chest and abdomen of a human body during radiotherapy.

[0089] In this embodiment, a method for predicting the period of the respiratory signal in the chest and abdomen surface area of ​​the human body during radiotherapy, on the basis of the specific embodiment 1, further restricts the construction of the ideal single-period respiratory signal described in step a, including the following steps:

[0090] Step a1, according to the normal breathing process of human beings, the breathing movement is divided into three stages: inhalation process, exhalation process and quasi-pause process;

[0091] Step a2, respectively determine the duration T of the inhalation process 1 , the duration of the exhalation process T 2 and the duration T of the class suspension process 3 ;

[0092] Step a3, with a period of 4T 1 A sinusoidal function with a phase of ...

specific Embodiment 3

[0095] This embodiment is an embodiment of a method for predicting the period of a respiratory signal in the surface area of ​​the chest and abdomen of a human body during radiotherapy.

[0096] In this embodiment, a method for predicting the period of the respiratory signal in the human chest and abdomen surface area during radiotherapy consists of the following steps:

[0097] Step a, constructing an ideal single-period respiratory signal;

[0098] Step a1, according to the normal breathing process of human beings, the breathing movement is divided into three stages: inhalation process, exhalation process and quasi-pause process;

[0099] Step a2, respectively determine the duration T of the inhalation process 1 , the duration of the exhalation process T 2 and the duration T of the class suspension process 3 ;

[0100] Step a3, with a period of 4T 1 A sinusoidal function with a phase of [0, π / 2] simulates the inhalation process to obtain a simulated inhalation signal; u...

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Abstract

The invention discloses a human thoracic and abdominal surface area respiratory signal period prediction method in radiotherapy, and belongs to the technical fields of oncology, precision instruments,engineering technologies, mathematics and the like. The method comprises the following steps: firstly, constructing an ideal single-cycle respiratory signal, then carrying out cycle continuation to obtain an ideal multi-cycle respiratory signal, finally, carrying out cycle extraction on the ideal multi-cycle respiratory signal, carrying out the whole extraction process based on data and calculation of an imaginary cycle, and completing cycle extraction in one cycle. The method can accurately extract the period of the ideal multi-period respiratory signal, and lays a simulation experiment foundation for accurately predicting respiratory movement.

Description

technical field [0001] The invention relates to a method for predicting the period of a respiratory signal in the surface area of ​​the chest and abdomen of a human body during radiotherapy, which belongs to the technical fields of tumor medicine, precision instruments, engineering technology, mathematics, and the like. Background technique [0002] Radiation therapy (hereinafter referred to as radiotherapy) is one of the most important means of treating cancer. About 70% of cancer patients will use radiotherapy in the course of cancer treatment, and about 40% of cancers can be cured by radiotherapy. The effect of radiation therapy is related to the precision and dose of radiation delivered to the tumor area. Malignant tumors of the digestive system are located in the thoracic and abdominal cavity. Affected by respiratory movement, the position and volume of the tumor will change over time, resulting in a decrease in the accuracy of radiation irradiation, thereby affecting ...

Claims

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Application Information

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IPC IPC(8): G16H50/50G16H20/40A61N5/10
Inventor 于晓洋胡亚欣徐雅婷王明韩岫君樊琪赵烟桥王妍张琴王淼朱子桐李宇潇
Owner HARBIN UNIV OF SCI & TECH
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