Research on the Dielectric Properties of Malignant and Normal Colorectal Tissues from 1 0 1 Cancer Surgeries
WANG Weiwei
LI Zhou
LIN Shiming
HAN Shuai
CHEN Miaoliang
DUAN Song
XIN Xuegang
CAI Zhai
Abstract：To verify whether the open-ended coaxial line method is effective to detect the differences between malignant and nor-mal colorectal tissues in relative permittivity and conductivity,and make a judgement of the pathological type of colorectal cancer.With the open-ended coaxial line method,adjusting the frequency range from 170 to 500 MHz,101 freshly excised colorectal cancerous specimens,obtained from the operation room of Zhujiang hospital,were detected both the relative permittivity and conductivity on the carcinoma nidus and normal mucosa,respectively.Seven frequency points including 170.32,212.90,255.48,298.06,383.22, 468.38 MHz and 500.00 MHz were selected for statistical analysis.Each specimen would be conducted pathological examinations after surgery.The relative permittivity and conductivity of malignant colorectal tissues were significantly higher than those of normal ones(P<0.01).Compared with adenocarcinoma tissue,mucinous adenocarcinoma tissue had higher conductivity at the frequency points of 170.32,212.90,255.48,298.06 and 383.22 MHz (P<0.05).And there showed no significances among the dielectric properties of three differentiated degrees,namely well-differentiated,middle-differentiated and poor-differentiated(P>0.05 ).The open-ended coaxial line method can not only identify the differences between malignant and normal colorectal tissues,but also decide which pathological type the colorectal cancer belongs to.
Keywords：Open-ended coaxial lineRelative permittivityConductivityColorectal cancerPathological type
Publication Date：2016-01-01
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：4( 270-273 )