MRI-temperature mapping during ultrasound prostate ablation using fat for phase estimation

Author

Rieke, Viola ; Ross, Anthony B. ; Nau, William H. ; Diederich, Chris J. ; Sommer, Graham ; Butts, Kim

Author_Institution

Dept. of Radiol., Stanford Univ., CA, USA

Volume

1

fYear

2004

Firstpage

2500

Lastpage

2502

Abstract

Referenceless proton resonance frequency (PRF) shift thermometry provides a means to measure temperature changes during minimally invasive thermotherapy that is inherently robust to motion and tissue displacement. In this study, the method is expanded to allow background phase estimation from fatty tissue. A correction scheme for temperature map distortions caused by the ultrasound applicator is developed. The method is tested during thermal ablation of canine prostate using a directional transurethral ultrasound applicator.

Keywords

biological organs; biological tissues; biomedical MRI; biomedical equipment; biomedical measurement; biomedical ultrasonics; biothermics; fats; patient treatment; phase estimation; temperature measurement; MRI-temperature mapping; background phase estimation; canine prostate; directional transurethral ultrasound applicator; fatty tissue; magnetic resonance imaging; minimally invasive thermotherapy; referenceless proton resonance frequency shift thermometry; temperature change measurement; thermal ablation; tissue displacement; ultrasound prostate ablation; Applicators; Displacement measurement; Distortion measurement; Frequency measurement; Phase estimation; Protons; Resonance; Resonant frequency; Temperature measurement; Ultrasonic imaging; magnetic resonance imaging; prostate; thermal therapy; thermometry; ultrasound;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2004. IEMBS '04. 26th Annual International Conference of the IEEE

Print_ISBN

0-7803-8439-3

Type

conf

DOI

10.1109/IEMBS.2004.1403720

Filename

1403720