Design and evaluation of medical microwave radiometer for measuring tissue temperature

Ravi, Vidyalakshmi M.; Akki, Rachana S.; Sugumar, Sathyapriya; Venkata, Krishnamurthy C.; Arunachalam, Kavitha

doi:10.23919/ursiap-rasc.2019.8738630

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…After the received signal is analyzed and processed, the information representing the temperature of the human body can be obtained. At present, researchers have made a series of achievements in the field of noncontact measurement of human body temperature [7,8] and human subcutaneous tissue temperature using microwave radiometers [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Multiband Noncontact Temperature-Measuring Microwave Radiometer

Sun

Liu

et al. 2021

Micromachines

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In this paper, a multiband noncontact temperature-measuring microwave radiometer system is developed. The system can passively receive the microwave signal of the core temperature field of the human body without removing the clothes of the measured person. In order to accurately measure the actual temperature of multilayer tissue in human core temperature field, four frequency bands of 4–6 GHz, 8–12 GHz, 12–16 GHz, and 14–18 GHz were selected for multifrequency design according to the internal tissue depth model of human body and the relationship between skin depth and electromagnetic frequency. Used to measure the actual temperature of human epidermis, dermis, and subcutaneous tissue, a small and highly directional multiband angular horn antenna was designed for the radiometer front end. After the error analysis of the full-power microwave radiometer, a novel hardware architecture of the microwave interferometric temperature-measuring radiometer is proposed, and it is proven that the novel interferometric microwave radiometer has less error uncertainty through theoretical deduction. The experimental results show that the maximum detection sensitivity of the novel interferometric microwave temperature-measuring radiometer is 215 mV/dBm, and the temperature sensitivity is 0.047 K/mV. Compared with the scheme of the full-power radiometer, the detection sensitivity is increased 7.45-fold, and the temperature sensitivity is increased 13.89-fold.

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