TY - GEN
T1 - THEORETICAL STUDY OF THE TEMPERATURE FLUCTUATIONS INDUCED DURING REFLECTED-SCANNED PLANAR ULTRASOUND HYPERTHERMIA
AU - Moros, Eduardo G.
AU - Fan, Xiaobing
AU - Straube, William L.
N1 - Publisher Copyright:
© 1997 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1997
Y1 - 1997
N2 - Temperature fluctuations inside of a target volume during scanned planar ultrasound hyperthermia were investigated numerically by varying scan time, blood perfusion, and skin temperature. Three dimensional (3-D), transient, acoustic power deposition patterns induced by a scanning ultrasound reflector linear array system (SURLAS) were simulated and input into an homogeneous, 3-D, transient, bioheat transfer equation model. It was found that the largest temperature fluctuations were located at the ends of the linear scan path where the scanning reflector comes to a sudden stop and reverses direction. The smallest fluctuation was located at the center of the scan window. For a given scan distance, the magnitude of the temperature fluctuations increased linearly with increasing scan time, and increased as a weak exponential function of blood perfusion rate. A scan time of 20 s or less is necessary to keep the temperature fluctuations within ±0.5 °C from the average temperature in a scan cycle for a scan window of 10 × 10 cm and a blood perfusion rate of 5 kg/m3s.
AB - Temperature fluctuations inside of a target volume during scanned planar ultrasound hyperthermia were investigated numerically by varying scan time, blood perfusion, and skin temperature. Three dimensional (3-D), transient, acoustic power deposition patterns induced by a scanning ultrasound reflector linear array system (SURLAS) were simulated and input into an homogeneous, 3-D, transient, bioheat transfer equation model. It was found that the largest temperature fluctuations were located at the ends of the linear scan path where the scanning reflector comes to a sudden stop and reverses direction. The smallest fluctuation was located at the center of the scan window. For a given scan distance, the magnitude of the temperature fluctuations increased linearly with increasing scan time, and increased as a weak exponential function of blood perfusion rate. A scan time of 20 s or less is necessary to keep the temperature fluctuations within ±0.5 °C from the average temperature in a scan cycle for a scan window of 10 × 10 cm and a blood perfusion rate of 5 kg/m3s.
UR - http://www.scopus.com/inward/record.url?scp=85210587519&partnerID=8YFLogxK
U2 - 10.1115/IMECE1997-1331
DO - 10.1115/IMECE1997-1331
M3 - Conference contribution
AN - SCOPUS:85210587519
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 173
EP - 177
BT - Advances in Heat and Mass Transfer in Biotechnology
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997
Y2 - 16 November 1997 through 21 November 1997
ER -