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 previously designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a ∼100 KHz bandwidth. 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. In this work we analyze radiofrequency (RF) coil designs suitable for RF Radiometry. We investigate the coil profile sensitivity to look where temperature information is coming from and the depth of penetration associated with the receiver used. We also look into the virtues of using multi-turn coils versus single loop coils. We conclude that by using multi-turn coils the received noise signal is more sensitive to sample noise and temperature can be estimated more accurately especially with the use of smaller receivers.
| Original language | English (US) |
|---|---|
| Title of host publication | 2007 IEEE/NIH Life Science Systems and Applications Workshop, LISA |
| Pages | 176-179 |
| Number of pages | 4 |
| DOIs | |
| State | Published - 2008 |
| Externally published | Yes |
| Event | 2007 IEEE/NIH Life Science Systems and Applications Workshop, LISA - Bethesda, MD, United States Duration: Nov 8 2007 → Nov 9 2007 |
Other
| Other | 2007 IEEE/NIH Life Science Systems and Applications Workshop, LISA |
|---|---|
| Country | United States |
| City | Bethesda, MD |
| Period | 11/8/07 → 11/9/07 |
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ASJC Scopus subject areas
- Computer Science Applications
- Information Systems
Cite this
RF radiometery sensor sensitivity and detection profile. / El-Sharkawy, AbdEl Monem M; Sotiriadis, Paul P.; Bottomley, Paul A; Atalar, Ergin.
2007 IEEE/NIH Life Science Systems and Applications Workshop, LISA. 2008. p. 176-179 4400913.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - RF radiometery sensor sensitivity and detection profile
AU - El-Sharkawy, AbdEl Monem M
AU - Sotiriadis, Paul P.
AU - Bottomley, Paul A
AU - Atalar, Ergin
PY - 2008
Y1 - 2008
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 previously designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a ∼100 KHz bandwidth. 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. In this work we analyze radiofrequency (RF) coil designs suitable for RF Radiometry. We investigate the coil profile sensitivity to look where temperature information is coming from and the depth of penetration associated with the receiver used. We also look into the virtues of using multi-turn coils versus single loop coils. We conclude that by using multi-turn coils the received noise signal is more sensitive to sample noise and temperature can be estimated more accurately especially with the use of smaller receivers.
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 previously designed and built an advanced, near-field radiometer operating at VHF frequencies (64MHz) with a ∼100 KHz bandwidth. 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. In this work we analyze radiofrequency (RF) coil designs suitable for RF Radiometry. We investigate the coil profile sensitivity to look where temperature information is coming from and the depth of penetration associated with the receiver used. We also look into the virtues of using multi-turn coils versus single loop coils. We conclude that by using multi-turn coils the received noise signal is more sensitive to sample noise and temperature can be estimated more accurately especially with the use of smaller receivers.
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U2 - 10.1109/LSSA.2007.4400913
DO - 10.1109/LSSA.2007.4400913
M3 - Conference contribution
SN - 9781424418138
SP - 176
EP - 179
BT - 2007 IEEE/NIH Life Science Systems and Applications Workshop, LISA
ER -