This paper presents the development and characterization of a single reference Dicke radiometer operating over 1.2 GHz-1.4 GHz for clinical applications. A variable hot noise source is designed using a peltier module for calibrating the radiometer. System characterization was carried out using a temperature controlled test load to obtain the calibration curve of the device. The accuracy of the calibrated single-reference Dicke radiometer is reported for a matched test load at thermal steady state. © 2018 IEEE.

Kavitha Arunachalam

Department of Engineering Design

C V Krishnamurthy

Department Of Physics

MICROWAVES

Thermometers

Tissue

Calibration curves

Clinical application

CONTROLLED TESTS

DICKE RADIOMETERS

MICROWAVE RADIOMETRY

Noise source

PELTIER MODULE

SYSTEM CHARACTERIZATION

Radiometers

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Characterization of Microwave Dicke Radiometer for Non-Invasive Tissue Thermometry

IMBioc 2018 - 2018 IEEE/MTT-S International Microwave Biomedical Conference

Microwave (MW) radiometry is proposed for passive monitoring of kidney temperature to detect vesicoureteral reflux (VUR) of urine that is externally heated by a MW hyperthermia device and thereafter reflows from the bladder to kidneys during reflux. Here, we characterize in tissue-mimicking phantoms the performance of a 1.375 GHz radiometry system connected to an electromagnetically (EM) shielded microstrip log spiral antenna optimized for VUR detection. Phantom EM properties are characterized using a coaxial dielectric probe and network analyzer (NA). Power reflection and receive patterns of the antenna are measured in layered tissue phantom. Receiver spectral measurements are used to assess EM shielding provided by a metal cup surrounding the antenna. Radiometer and fiberoptic temperature data are recorded for varying volumes (10-30 mL) and temperaturesg (40-46°C) of the urine phantom at 35 mm depth surrounded by 36.5°C muscle phantom. Directional receive pattern with about 5 power spectral density at 35 mm target depth and better than 10 dB return loss from tissue load are measured for the antenna. Antenna measurements demonstrate no deterioration in power reception and effective EM shielding in the presence of the metal cup. Radiometry power measurements are in excellent agreement with the temperature of the kidney phantom. Laboratory testing of the radiometry system in temperature-controlled phantoms supports the feasibility of passive kidney thermometry for VUR detection. © 2010 IEEE.

Fulltext

IEEE Transactions on Biomedical Engineering

Detection of vesicoureteral reflux using microwave radiometrysystem characterization with tissue phantoms

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An Efficient, Accurate and Robust Radiometer Configuration for Microwave Temperature Measurement For Industrial and Medical Applications

Characterization of microwave dicke radiometer for non-invasive tissue thermometry

Journal	Data powered by TypesetIMBioc 2018 - 2018 IEEE/MTT-S International Microwave Biomedical Conference
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open Access	No