Method for carrying out breast tumor imaging by utilizing microwave reflection time domain S21 signal

Abstract

The invention relates to a method for carrying out breast tumor imaging by utilizing a microwave reflection time domain S21 signal. The method comprises the following steps: preparing a cavity breast model and a suspended tumor prosthesis; manufacturing a breast model with a tumor; connecting a transmitting antenna and a feeder line with a port 1 of a vector network analyzer; connecting a receiving antenna and a feeder line with a port 2 of the vector network analyzer; stimulating a measurement mode of a network analyzer time domain S21 signal; clinging the transmitting antenna and the receiving antenna and placing oppositely in a first-time measurement process; recording a transmission path time domain S21 signal at the moment; separating the transmitting antenna and the receiving antenna for a certain distance in a second-time measurement process; recording a new transmission path time domain S21 signal; subtracting the time domain S21 signal in the presence of the tumor prosthesis by the time domain S21 signal in the absence of the tumor prosthesis, so as to obtain time domain S21 signal changes caused by the tumor prosthesis; carrying out the tumor imaging on the subtracted time domain S21 signal by utilizing a confocal method.

Description

technical field [0001] The invention belongs to the technical field of microwave imaging and relates to a breast tumor imaging method. Background technique [0002] Breast cancer has become a fatal disease with high incidence among women in modern society. Early diagnosis and early treatment are of great significance to improve the cure rate of the disease. Existing detection methods such as mammography X-ray, ultrasound, and nuclear magnetic resonance have disadvantages such as radiation risk, high misdiagnosis rate, and high price. As an emerging non-destructive testing method, microwave testing can effectively detect early tumors in the breast and image them clearly. Microwave intramammary tumor imaging is mainly based on the principle of radar near-field imaging. The microwave signal is incident into the breast through the transmitting antenna. Due to the difference in dielectric properties between the tumor and normal tissue, the reflected signal after the incident sig...

AI Technical Summary

Problems solved by technology

The commonly used microwave breast imaging technology generally uses time-domain signal imaging. This method is complex in imaging and requires both a microwave signal transmitting module and a microwave signal receiving module. The price is relatively expensive, the time synchronization is complicated, and the operation is difficult.

Images