S波段微波癌症诊断仪  

An S-Band Microwave Cancer Detector

作　　者：向勋贤[1] 胡英[1] 樊文泉 许立群 

机构地区：[1]华中理工大学电子与信息工程系

出　　处：《华中理工大学学报》1990年第3期171-174,共4页Journal of Huazhong University of Science and Technology

摘　　要：70年代,微波辐射计量开始应用于生物医学领域。Leroy等人用微波热像仪诊断乳腺癌、脑血管疾病及脑膜肿瘤,但都没有解决深部肿瘤的探测问题。为此,本文报道S波段微波癌症诊断仪的研制。1.微波热辐射的接收生物组织中自发微波热辐射波矢量图实际上为椭球面,若所用天线是线偏振的,则探头仅能探测辐射到天线口面的总功率的一半。846型S波段微波诊断仪采用了圆极化探头,检测到的生物热辐射功率较前人的大一倍。检测辐射功率较测量亮温方便,但辐射功率的特征值为亮度温度T_B。在实际应用中常用T_B作为被测值,只要微波辐射计能分别提取亮度温度信息T_(Bi)及各层媒质的发射率e_i,各层媒质的实际物理温度T_i便可唯一确定。对于分层媒质有T_B=sum from i=1 to n(T_(Bi))=sum from i=1 to n(e_iT_i),当不计层间散射时,可改写成T_B=sum from i=1 to n(η_iT_B)。设皮肤组织对T_B的贡献的百分比为η_s。The principle, construction and diagnostic results of an S-band microwave cancer detector are described and reported. It has been found from the use of the detector for more than 1,100 clinical cases in 8 hospitals that the true positive (TP) rate is 86%, the true negative (TN) rate is 81% for esophageal cancer; the TP rate is 86%, the TN rate is 67-75% for nasopharyngeal cancer and the TP rate is 76% when the TN rate is 76% for nepatic cancer. The accuracy for the diagnosis of breast tumour is over 88%.

关 键 词：癌症诊断仪 微波 短波段 

分 类 号：R730.4[医药卫生—肿瘤]