Recent Trends in Medical Microwave Radiometry
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概要
- 論文の詳細を見る
Microwave radiometry has been investigated for non-invasive measurement of temperature in human body. Recent trends are to explore the capability of retrieving a temperature profile or map from a set of brightness temperatures measured by a multifrequency radiometer operating in a 1-6 GHz range. The retrieval of temperature from the multifrequency measurement data is formulated as an inverse problem in which the number of independent measurement or data is limited (≦7) and the data suffer from considerably large random fluctuations. The standard deviation of the data fluctuation is given by the brightness temperature resolution of the instrument (0.04-0.1K) . Solutions are prone to instabilities and large errors unless proper solution methods are used. Solution methods developed during the last few years are reviewed : singular system analysis, bio-heat transfer solution matched with radiometric data, and model-fitting combined with Monte Carlo technique. Typical results obtained by these methods are presented to indicate a crosssection of the present-state-of-the-development in the field. This review concludes with discussions on the radiometric weighting function which connects physical temperatures in object to the brightness temperature. Three-dimensional weighting functions derived by the modal analysis and the FDTD method for a rectangular waveguide antenna coupled to a four layered lossy medium are discussed. Development of temperature retrieval procedures incorporating the 3-D weighting functions is an important and challenging task for future work in this field.
- 社団法人電子情報通信学会の論文
- 1995-06-25
著者
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Abe K
Research Institute Of Electronics Shizuoka University
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Sugiura Toshifumi
Research Institute of Electronics, Shizuoka University
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Abe Katsumi
Research Institute of Electronics, Shizuoka University
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Mizoshiri Shinya
Research Institute of Electronics, Shizuoka University
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Mizushina Shizuo
Research Institute of Electronics, Shizuoka University
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Ohba Hiroyuki
Research Institute of Electronics, Shizuoka University
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Ohba Hiroyuki
Research Institute Of Electronics Shizuoka University
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Mizushina S
Research Institute Of Electronics Shizuoka University
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Mizushina Shizuo
Research Institute Of Electronics Shizuoka University
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Sugiura T
Research Institute Of Electronics Shizuoka University
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Sugiura T
Shizuoka Univ. Shizuoka‐shi Jpn
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Sugiura Toshifumi
Research Institute Of Electronics Shizuoka University
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Sugiura T
Shizuoka University
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