Title :
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
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 2004. IEMBS '04. 26th Annual International Conference of the IEEE
Print_ISBN :
0-7803-8439-3
DOI :
10.1109/IEMBS.2004.1403720
