Dual-frequency High Intensity Focused Ultrasound (HIFU) Accelerating Therapy

Author

He, P.Z. ; Shou, W.D. ; Duan, S.M. ; Xia, R.M.

Author_Institution

Dept. of Biomed. Eng., Shanghai Jiao Tong Univ.

fYear

2006

Firstpage

213

Lastpage

216

Abstract

By cutting a spherical focused transducer into two coaxial and confocal transducer elements, a confocal complex transducer used in dual-frequency HIFU system was obtained. The lesion induced by dual-frequency HIFU in freshly excised porcine livers were obviously larger than that induced by conventional single-frequency HIFU at the same exposure conditions. The experiment results have also shown that injecting ultrasound contrast agents to the tissue or selecting appropriate difference frequency could further improve the lesioning effect. The dual-frequency HIFU would bring a new approach to accelerate ablating large tumor with HIFU and also provide a new method to miniaturize the conventional HIFU apparatus

Keywords

biomedical transducers; biomedical ultrasonics; patient treatment; tumours; ultrasonic transducers; HIFU; coaxial transducer elements; confocal complex transducer; confocal transducer elements; dual-frequency high intensity focused accelerating therapy; lesion; porcine livers; tumor ablation; ultrasound contrast agents; Acceleration; Biomedical engineering; Biomedical transducers; Lesions; Liver neoplasms; Medical treatment; Physics; Radio frequency; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the

Conference_Location

Shanghai

Print_ISBN

0-7803-8741-4

Type

conf

DOI

10.1109/IEMBS.2005.1616381

Filename

1616381