Microwave radiometric measurements of the temperature inside a body

Enander, B.; Larson, Gunnar

doi:10.1049/el:19740250

Cited by 50 publications

(26 citation statements)

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“…23,40 Excellent reviews of the subject are those of Foster and Cheever 21 and Rosen et al 23 Since the 1970s, several research groups have carried out clinical evaluations of microwave radiometry (passive, hybrid, and active approaches). [218][219][220][221][222][223][224][225][226][227][228][229][230][231][232][233][234][235][236][237] The most important work was done by Barret et al 220 in the fi eld of breast cancer screening. One thousand patients were examined at the Faulkner Hospital in Boston with microwave radiometry (operating at 1.3, 3.3, and 6 GHz) and infrared thermography.…”

Section: Viic Microwave Radiometric Imagingmentioning

confidence: 99%

Thermal Therapy, Part IV: Electromagnetic and Thermal Dosimetry

Habash

Bansal

Krewski

et al. 2007

Crit Rev Biomed Eng

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ABSTRACT:In this article some of the important techniques in electromagnetic (EM) and thermal dosimetry are reviewed. Three major areas are discussed: modeling power deposition and estimation of EM energy absorbed by tissues exposed to EM radiation, electrical-thermal modeling for thermal therapy with various models of heat transfer in living tissues, and thermal dosimetry using invasive and noninvasive thermometry. Knowledge about the temperature distributions achieved can only be obtained by treatment planning of patient therapy. This process is called thermal therapy planning system (TTPS), which is a large and complex system for design, control, documentation, and evaluation of the treatment that also provides data for treatment optimization. Various imaging techniques for guidance and monitoring necessary for clinical treatments are also discussed. The review concludes by suggesting future avenues for investigations.

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Section: Viic Microwave Radiometric Imagingmentioning

confidence: 99%

Thermal Therapy, Part IV: Electromagnetic and Thermal Dosimetry

Habash

Bansal

Krewski

et al. 2007

Crit Rev Biomed Eng

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“…For several decades, scientists have been investigating implementation of microwave technology through the use of non-ionizing electromagnetic waves to read in vivo temperatures inside the human body (Enander and Larson 1974, Barrett and Meyers 1975, Leroy et al 1998. It is well known that microwave radiometry (Mizushina et al 1995, Stec et al 2004) and infrared techniques (Kennedy et al 2009, Jiang et al 2011) can be applied for non-invasive temperature measurements of superficial tissue.…”

Section: Introductionmentioning

confidence: 99%

Radiometric temperature reading of a hot ellipsoidal object inside the oral cavity by a shielded microwave antenna put flush to the cheek

Klemetsen

Jacobsen²,

Birkelund³

2012

Phys. Med. Biol.

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Abstract.A new scheme for detection of vesicoureteral reflux (VUR) in children has recently been proposed in the literature. The idea is to warm bladder urine via microwave exposure to at least fever temperatures, and observe potential urine reflux from the bladder back to the kidneys by medical radiometry. As a preliminary step towards realization of this detection device, we present non invasive temperature monitoring by use of microwave radiometry in adults to observe temperature dynamics in vivo of a water filled balloon placed within the oral cavity. The relevance of the approach with respect to detection of VUR in children is motivated by comparing the oral cavity and cheek tissue with axial CT images of young children in the bladder region. Both anatomical locations reveal a triple-layered tissue structure consisting of skin-fat-muscle with a total thickness of about 8-10 mm. In order to mimic variations in urine temperature, the target balloon was flushed with water coupled to a heat exchanger, that was moved between waterbaths of different temperature, to induce measurable temperature gradients.The applied radiometer has a center frequency of 3.5 GHz and provides a sensitivity (accuracy) of 0.03 o C for a data acquisition time of 2 secs. Three different scenarios were tested and included observation through the cheek tissue with and without an intervening water bolus compartment present. In all cases, radiometric readings observed over a time span of 900 secs were shown to be highly correlated (R∼0.93) with in situ temperatures obtained by fiberoptic probes. 71Radiometric temperature reading of a hot object inside the oral cavity 2

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“…During the last decades, a number of research groups have studied various clinical applications based on radio-thermometry for detection of thermal anomalies in subcutaneous, or invasively more deeper, parts of the human body. The possibility of using microwave radiometry for non-invasive thermometry was originally suggested back in the early 1970's (Edrich & Hardee, 1974;Enander & Larson, 1974) and the sensing principle was denoted microwave thermography.…”

Section: Introductionmentioning

confidence: 99%

Non-invasive temperature monitoring during microwave heating applying a miniaturized radiometer

Jacobsen¹

2011

Microwave Heating

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Microwave radiometric measurements of the temperature inside a body

Cited by 50 publications

References 1 publication

Thermal Therapy, Part IV: Electromagnetic and Thermal Dosimetry

Thermal Therapy, Part IV: Electromagnetic and Thermal Dosimetry

Radiometric temperature reading of a hot ellipsoidal object inside the oral cavity by a shielded microwave antenna put flush to the cheek

Non-invasive temperature monitoring during microwave heating applying a miniaturized radiometer

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