A new multi-frequency microwave radiometer for medical operation
| Autor: | F. Bardati, P. Tognolatti, R. Giusto |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Radiometer
Computer science Frequency band Microwave radiometer Metals and Alloys Radiation Condensed Matter Physics Signal Surfaces Coatings and Films Electronic Optical and Magnetic Materials Power (physics) Calibration Electrical and Electronic Engineering Instrumentation Microwave Remote sensing |
| Zdroj: | Sensors and Actuators A: Physical. 32:291-296 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/0924-4247(92)80001-j |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|