Title :
The simulations of ultrasound power patterns of low-frequency cylindrical transducers for tumors inside bones
Author :
Lu, Bing-Yuh ; Yang, Rong-Sen ; Li, Pai-Chi ; Liang, Tzu-Chen ; Wang, Cheng-Yi ; Kuo, Te-Son
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This study presents the therapeutic ultrasound power pattern simulations for tumors inside bone, i.e. intraosseous tumors without cortical breakthrough, using the low-frequency cylindrical transducers. The authors have shown that the 3-D wave equation for damped wave is a kind of Helmholtz´s equation that can be solved by the commercially available software. Therefore, such a wave equation method can be utilized to solve the reflection and refraction issues in the tissue interfaces. This work sets the cylindrical transducer with 10 cm radius and 10 cm height. Considering the different parameters of bone thickness, driving frequency, muscle depth, radius, and length of tumor through scanning the low-frequency cylindrical transducer, the select 50 KHz driving frequency transducer seemed most optimal to treat most cases of intraosseous tumors
Keywords :
biomedical ultrasonics; orthopaedics; radiation therapy; tumours; ultrasonic transducers; 10 cm; 50 kHz; US reflection; US refraction; bone thickness; cylindrical transducer; driving frequency; intraosseous tumors; low-frequency cylindrical transducers; muscle depth; tissue interfaces; tumors inside bones; ultrasound power patterns simulations; wave equation method; Biomedical transducers; Bones; Frequency; Hyperthermia; Integral equations; Muscles; Neoplasms; Partial differential equations; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.804459
