A scanned focused ultrasound device for hyperthermia: numerical simulation and prototype implementation

Paul M. Meaney; Timothy Raynolds; Shireen D. Geimer; Lincoln Potwin; Keith D. Paulsen

doi:10.1117/12.552755

13 July 2004 A scanned focused ultrasound device for hyperthermia: numerical simulation and prototype implementation

Paul M. Meaney, Timothy Raynolds, Shireen D. Geimer, Lincoln Potwin, Keith D. Paulsen

Proceedings Volume 5312, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIV; (2004) https://doi.org/10.1117/12.552755
Event: Biomedical Optics 2004, 2004, San Jose, CA, United States

Abstract

We are developing a scanned focused ultrasound system for hyperthermia treatment of breast cancer. Focused ultrasound has significant potential as a therapy delivery device because it can focus sufficient heating energy below the skin surface with minimal damage to intervening tissue. However, as a practical therapy system, the focal zone is generally quite small and requires either electronic (in the case of a phased array system) or mechanical steering (for a fixed bowl transducer) to cover a therapeutically useful area. We have devised a simple automated steering system consisting of a focused bowl transducer supported by three vertically movable rods which are connected to computer controlled linear actuators. This scheme is particularly attractive for breast cancer hyperthermia where the support rods can be fed through the base of a liquid coupling tank to treat tumors within the breast while coupled to our noninvasive microwave thermal imaging system. A MATLAB routine has been developed for controlling the rod motion such that the beam focal point scans a horizontal spiral and the subsequent heating zone is cylindrical. In coordination with this effort, a 3D finite element thermal model has been developed to evaluate the temperature distributions from the scanned focused heating. In this way, scanning protocols can be optimized to deliver the most uniform temperature rise to the desired location.

Citation Download Citation

Paul M. Meaney, Timothy Raynolds, Shireen D. Geimer, Lincoln Potwin, and Keith D. Paulsen "A scanned focused ultrasound device for hyperthermia: numerical simulation and prototype implementation", Proc. SPIE 5312, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIV, (13 July 2004); https://doi.org/10.1117/12.552755

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Transducers

Ultrasonography

Tissues

3D modeling

Breast

Imaging systems

Thermal modeling

Show All Keywords

Keywords/Phrases

Search In:

Publication Years