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A method for estimating average dielectric properties for microwave breast imaging

A technology of breast imaging and dielectric properties, applied in the field of biomedical detection, can solve problems such as reconstruction blur

Active Publication Date: 2021-12-03
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conversely, if the average dielectric property estimate is inaccurate, blurry, unfocused images are reconstructed, potentially masking cancerous lesions

Method used

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  • A method for estimating average dielectric properties for microwave breast imaging
  • A method for estimating average dielectric properties for microwave breast imaging
  • A method for estimating average dielectric properties for microwave breast imaging

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Experimental program
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Embodiment Construction

[0023] The present invention will be described below in conjunction with the accompanying drawings and examples.

[0024] (1) figure 1 For the breast MRI source image, first stretch the image once to 600×600 pixels, so that each pixel in the image corresponds to an FDTD grid. This step is performed in MATLAB, first read in Only contain the source image of the image itself, convert it into a gray value matrix, and then use the imresize command to stretch the image, discretize the breast tissues of the source image, and add a layer of skin based on the breast boundary outline, usually Only one breast is considered, and the right breast is taken as a simulation model

[0025] (2) Set the tumor location (43mm, 23mm) and the tumor radius 3mm in the breast, assign electromagnetic parameters to each tissue, and place an antenna array on the skin surface, replacing it with a point source (such as figure 2 As shown), each antenna transmits signals in turn, and other antennas receive...

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Abstract

The invention relates to a method for estimating the average dielectric property of microwave breast imaging, comprising the following steps: stretching each breast MRI source image, discretizing each breast tissue, and taking the breast boundary contour as a benchmark, adding A layer of skin is interpolated to establish a three-dimensional breast model; the tumor location and tumor radius are set in the three-dimensional breast model, and antenna arrays are placed on the skin surface, replaced by point sources. Each antenna transmits signals in turn, and other antennas receive signals , use the confocal algorithm to image all the received signals; construct an improved focus quality metric; determine the objective function, that is, the image signal-to-clutter ratio SCR; solve the maximum value of the microwave breast image SCR to obtain the corresponding breast average dielectric constant.

Description

technical field [0001] The invention belongs to the technical field of biomedical detection, and relates to a method for estimating the average dielectric property of microwave breast imaging based on an image quality index. Background technique [0002] Breast cancer is the malignant tumor disease with the highest incidence rate in women, and its mortality rate ranks first in the mortality rate of malignant tumors in women. The diagnosis of early breast tumors is undoubtedly of decisive significance for improving the treatment rate of breast diseases and the long-term survival rate of patients. Currently commonly used detection methods for early breast cancer include mammography, ultrasound imaging technology, computed tomography, nuclear magnetic resonance imaging technology, thermal imaging detection, etc., but many methods have certain shortcomings, such as radiation damage to the human body, The imaging contrast is low and the cost is high. The principle of ultra-broa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055A61B5/0507A61B5/00
CPCA61B5/004A61B5/0507A61B5/055
Inventor 肖夏刘雨
Owner TIANJIN UNIV