Heating patterns of the Helios ultrasound hyperthermia system
| Autor: | Paul R. Stauffer, S. Henderson, E. Seppi, K. Lindsley, Penny K. Sneed, R. Chin, E. Shapiro, Theodore L. Phillips |
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| Rok vydání: | 1993 |
| Předmět: |
Hyperthermia
Cancer Research Materials science Swine Thermometers Physiology Transductor Ultrasonic Therapy HeliOS Imaging phantom Body Temperature Neoplasms Physiology (medical) medicine Animals Humans business.industry Ultrasound Thigh muscle Specific absorption rate Anatomy equipment and supplies medicine.disease Models Structural body regions Transducer Evaluation Studies as Topic Female business Biomedical engineering |
| Zdroj: | International Journal of Hyperthermia. 9:675-684 |
| ISSN: | 1464-5157 0265-6736 |
| DOI: | 10.3109/02656739309032055 |
| Popis: | Thermal dosimetry studies of the Helios ultrasound system were performed in a tissue-equivalent phantom and in porcine tissues in vivo. SAR distributions in the phantom demonstrate the adjustability of the power deposition pattern from the 50 cm diameter annular array of 30 transducers. Examples are given of well-localized SAR patterns (3 cm diameter) in the phantom, and of peripherally enhanced (doughnut-shaped) SAR patterns up to 10 cm in diameter at the focal plane. In vivo trials in porcine thigh muscle demonstrate the ability of the Helios system to produce regions of therapeutic heating (42-45 degrees C) as small as 20 cm3 and as large as 200 cm3 at depths of greater than 10 cm at a frequency of 0.5 MHz. |
| Databáze: | OpenAIRE |
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