Feasibility of interstitial thermotherapy with ultrasound waveguide applicator arrays

Boguslaw J. Jarosz

doi:10.1117/12.304357

2 April 1998 Feasibility of interstitial thermotherapy with ultrasound waveguide applicator arrays

Boguslaw J. Jarosz

Proceedings Volume 3249, Surgical Applications of Energy; (1998) https://doi.org/10.1117/12.304357
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

We discuss potential of ultrasound waveguide applicator arrays for interstitial heating of brain tissue. First we describe specific absorption rate and show the importance of attenuation term at higher frequencies for cylindrical applicators. Ultrasound propagation characteristic to the applicator results in a shear component in the tissue. The component is significant over a small distance from the applicator. We obtain 3D temperature distribution using finite element analysis simulations for four-applicator array. The simulations show that the array is capable of heating the tissue to 56 degree(s)C. This high temperature leads to an undesired effect of heat toxicity in the adjacent tissue. The following simulations demonstrate how to optimize energy deposition, especially for asymmetries in boundary temperature. We investigate effects of effective thermal conductivity and antenna's length on the temperature pattern. We find that the array can be used for thermotherapy in clinically relevant volumes with the transducers operated at higher frequencies.

Citation Download Citation

Boguslaw J. Jarosz "Feasibility of interstitial thermotherapy with ultrasound waveguide applicator arrays", Proc. SPIE 3249, Surgical Applications of Energy, (2 April 1998); https://doi.org/10.1117/12.304357

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available