TY - GEN
T1 - TEMPERATURE FEEDBACK CONTROL FOR HYPERTHERMIA OF CHEST WALL VOLUMES WITH DUAL-FREQUENCY ULTRASOUND
AU - Moros, Eduardo G.
AU - Straube, William L.
AU - Myerson, Robert
N1 - Funding Information:
This study was supported by NIH/NCI Grant No. R29-CA63121.
Publisher Copyright:
© 1999 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1999
Y1 - 1999
N2 - Therapeutic temperature distributions during hyperthermia treatments are very difficult to maintain (e.g., 41.5 to 43°C for 45 to 60 min.) due to many heat removal/loss mechanisms. Thermoregulatory responses of the human body are efficacious in preserving and re-establishing normothermic conditions, and are considered to be the main cause of temperature nonuniformities through effected changes in blood perfusion and blood flow in large vessels. From the very beginning of hyperthermia technology development temperature feedback control systems (temperature controllers) have been proposed as a way to counterbalance thermoregulation and improve thermal doses. Only a few controllers, however, have been thoroughly tested numerically, experimentally, and most importantly, clinically. In this paper the proportional-integral-derivative bang-bang (PIDBB) controller of Lin et al. (1990), originally designed for a scanned focused ultrasound system for deep localized hyperthermia, was applied numerically to a scanned dual-frequency planar ultrasound system for chest wall hyperthermia. It was found that PIDBB controller with the optimal parameter values as determined by Lin et al. (1990) performed satisfactorily in controlling temperatures in superficial chest wall volumes.
AB - Therapeutic temperature distributions during hyperthermia treatments are very difficult to maintain (e.g., 41.5 to 43°C for 45 to 60 min.) due to many heat removal/loss mechanisms. Thermoregulatory responses of the human body are efficacious in preserving and re-establishing normothermic conditions, and are considered to be the main cause of temperature nonuniformities through effected changes in blood perfusion and blood flow in large vessels. From the very beginning of hyperthermia technology development temperature feedback control systems (temperature controllers) have been proposed as a way to counterbalance thermoregulation and improve thermal doses. Only a few controllers, however, have been thoroughly tested numerically, experimentally, and most importantly, clinically. In this paper the proportional-integral-derivative bang-bang (PIDBB) controller of Lin et al. (1990), originally designed for a scanned focused ultrasound system for deep localized hyperthermia, was applied numerically to a scanned dual-frequency planar ultrasound system for chest wall hyperthermia. It was found that PIDBB controller with the optimal parameter values as determined by Lin et al. (1990) performed satisfactorily in controlling temperatures in superficial chest wall volumes.
UR - http://www.scopus.com/inward/record.url?scp=85122706313&partnerID=8YFLogxK
U2 - 10.1115/IMECE1999-0592
DO - 10.1115/IMECE1999-0592
M3 - Conference contribution
AN - SCOPUS:85122706313
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 119
EP - 125
BT - Advances in Heat and Mass Transfer in Biotechnology
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999
Y2 - 14 November 1999 through 19 November 1999
ER -