A NEW MULTIFREQUENCY MICROWAVE RADIOMETER FOR MEDICAL OPERATION
A NEW MULTIFREQUENCY MICROWAVE RADIOMETER FOR MEDICAL OPERATION
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DOI：
10.1016/0924-4247(92)80001-j
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发表时间：
1992-04-01
影响因子：
4.6
通讯作者：
BARDATI, F
中科院分区：
文献类型：
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作者：
TOGNOLATTI, P;GIUSTO, R;BARDATI, F
多频微波辐射测量已被考虑用于测量人体组织的次表面温度分布，设想的应用主要涉及癌症热疗治疗中的非侵入性温度监测。该传感器由一个宽带微波接收器组成，该接收器产生与输入辐射功率成比例的信号，然后校准处理器对接收器输出进行平均，并计算每个频带中的输入功率的估计值。我们研制了一种新的辐射计系统的辐射平衡型，以抵消反射率误差，可能会影响多频辐射数据到一个无法忍受的数额。在本文中，我们讨论了反射率误差的基础上，我们的系统的入射辐射和接收器的模型。文中还给出了将此误差传播到温度反演不确定度的公式。
Multi-frequency microwave radiometry has been considered for the measurement of sub-surface temperature distributions of human tissues, envisaged applications being mainly related to the non-invasive temperature monitoring in hyperthermia treatment of cancer. The sensor consists of a broadband microwave receiver, which generates a signal proportional to input radiation power, then a calibration processor averages the receiver output and computes an estimate of the input power in each frequency band. We have developed a new radiometer system of the radiation balance type to counteract the reflectivity errors which may affect the multi-frequency radiometric data to an intolerable amount. In this paper we discuss the reflectivity error of our system on the basis of a model of both incoming radiation and receiver. A formula, which propagates this error to temperature retrieval uncertainty, is also given.