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Proceedings Paper

Noninvasive temperature monitoring using ultrasound tissue characterization method
Author(s): Petr Novak; Lubomir Pousek; Petr Schreib; Peter Peschke; Jan Vrba; Ivan Zuna
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Paper Abstract

Microwave thermotherapy (MT) is an oncological treatment. At present the invasive thermometer probes are clinically used for temperature measuring during an MT. Any invasive handling of tumors is of high-risk. A new method of noninvasive monitoring of temperature distribution in tissue has been developed. An MT treatment of the experimentally induced pedicle-tumors of the rat was prepared. It consists of an intelligent regulation loop controlling a high frequency (HF) generator according to the maximal measured temperature in the tissue and a special HF MT applicator. The loop is also equipped with an invasive thermometer (4 invasive probes). During the MT treatment the series of ultrasound B-mode images were obtained. The texture parameters were evaluated form the obtained ultrasound images. These parameters were correlated with the invasively measured temperature during the MT session. For 60 rat samples a strong correlation between the mean gray level in the ROIs in the ultrasound pictures and the invasively measured temperature in the range 37-44 degree(s)C (98.6-111.2 F) was found. The correlation coefficient of the mean gray level and the invasively measured temperature is 0.96+/- 0.05. A system for representation of changes of spatial temperature distribution of the whole tumor during MT will be presented.

Paper Details

Date Published: 30 May 2001
PDF: 9 pages
Proc. SPIE 4325, Medical Imaging 2001: Ultrasonic Imaging and Signal Processing, (30 May 2001); doi: 10.1117/12.428237
Show Author Affiliations
Petr Novak, Czech Technical Univ. (Czech Republic)
Lubomir Pousek, Czech Technical Univ. (Czech Republic)
Petr Schreib, Czech Technical Univ. (Czech Republic)
Peter Peschke, German Cancer Research Ctr. (Germany)
Jan Vrba, Czech Technical Univ. (Czech Republic)
Ivan Zuna, German Cancer Research Ctr. (Germany)

Published in SPIE Proceedings Vol. 4325:
Medical Imaging 2001: Ultrasonic Imaging and Signal Processing
Michael F. Insana; K. Kirk Shung, Editor(s)

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