A new RF radiometer for absolute noninvasive temperature sensing in biomedical applications

Abd El Monem M. El-Sharkawy; Paul P. Sotiriadis; Paul A. Bottomley; Ergin Atalar

doi:10.1109/iscas.2007.378402

A new RF radiometer for absolute noninvasive temperature sensing in biomedical applications

Abd El Monem M. El-Sharkawy, Paul P. Sotiriadis, Paul A. Bottomley, Ergin Atalar

School of Medicine

Research output: Contribution to journal › Conference article › peer-review

5 Scopus citations

Abstract

Temperature sensing using microwave radiometry has proven value for non-invasively measuring the absolute temperature of tissues inside the human body. However, current clinical radiometers operate in GHz or infrared frequency ranges; this limits their depth of penetration since the human body is not "transparent" at these frequencies. To address this problem, we have designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a -100 KHz bandwidth. In the core of the radiometer lie an embedded impedance analyzer and an automatic antenna matching network; they compensate in-real time for any load variation that may occur due to near-field antenna coupling and movements of the human body. The radiometer has performed accurate temperature measurements to within ±0.1°C, over a tested physiological range of 28-40°C in saline phantoms whose electric properties match those of human tissue. The current method has the potential of being integrated on Magnetic Resonance Imaging (MRI) modalities.

Original language	English (US)
Article number	4252638
Pages (from-to)	329-332
Number of pages	4
Journal	Proceedings - IEEE International Symposium on Circuits and Systems
DOIs	https://doi.org/10.1109/iscas.2007.378402
State	Published - 2007
Event	2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 - New Orleans, LA, United States Duration: May 27 2007 → May 30 2007

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/iscas.2007.378402

Cite this

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title = "A new RF radiometer for absolute noninvasive temperature sensing in biomedical applications",

abstract = "Temperature sensing using microwave radiometry has proven value for non-invasively measuring the absolute temperature of tissues inside the human body. However, current clinical radiometers operate in GHz or infrared frequency ranges; this limits their depth of penetration since the human body is not {"}transparent{"} at these frequencies. To address this problem, we have designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a -100 KHz bandwidth. In the core of the radiometer lie an embedded impedance analyzer and an automatic antenna matching network; they compensate in-real time for any load variation that may occur due to near-field antenna coupling and movements of the human body. The radiometer has performed accurate temperature measurements to within ±0.1°C, over a tested physiological range of 28-40°C in saline phantoms whose electric properties match those of human tissue. The current method has the potential of being integrated on Magnetic Resonance Imaging (MRI) modalities.",

author = "El-Sharkawy, {Abd El Monem M.} and Sotiriadis, {Paul P.} and Bottomley, {Paul A.} and Ergin Atalar",

year = "2007",

doi = "10.1109/iscas.2007.378402",

language = "English (US)",

pages = "329--332",

journal = "Proceedings - IEEE International Symposium on Circuits and Systems",

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note = "2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007 ; Conference date: 27-05-2007 Through 30-05-2007",

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AU - El-Sharkawy, Abd El Monem M.

AU - Sotiriadis, Paul P.

AU - Bottomley, Paul A.

AU - Atalar, Ergin

PY - 2007

Y1 - 2007

N2 - Temperature sensing using microwave radiometry has proven value for non-invasively measuring the absolute temperature of tissues inside the human body. However, current clinical radiometers operate in GHz or infrared frequency ranges; this limits their depth of penetration since the human body is not "transparent" at these frequencies. To address this problem, we have designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a -100 KHz bandwidth. In the core of the radiometer lie an embedded impedance analyzer and an automatic antenna matching network; they compensate in-real time for any load variation that may occur due to near-field antenna coupling and movements of the human body. The radiometer has performed accurate temperature measurements to within ±0.1°C, over a tested physiological range of 28-40°C in saline phantoms whose electric properties match those of human tissue. The current method has the potential of being integrated on Magnetic Resonance Imaging (MRI) modalities.

AB - Temperature sensing using microwave radiometry has proven value for non-invasively measuring the absolute temperature of tissues inside the human body. However, current clinical radiometers operate in GHz or infrared frequency ranges; this limits their depth of penetration since the human body is not "transparent" at these frequencies. To address this problem, we have designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a -100 KHz bandwidth. In the core of the radiometer lie an embedded impedance analyzer and an automatic antenna matching network; they compensate in-real time for any load variation that may occur due to near-field antenna coupling and movements of the human body. The radiometer has performed accurate temperature measurements to within ±0.1°C, over a tested physiological range of 28-40°C in saline phantoms whose electric properties match those of human tissue. The current method has the potential of being integrated on Magnetic Resonance Imaging (MRI) modalities.

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ER -

A new RF radiometer for absolute noninvasive temperature sensing in biomedical applications

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