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On-line monitoring of ultrasonic surgery with MR imaging

✍ Scribed by Ammar Darkazanli; Kullervo Hynynen; Evan C. Unger; John F. Schenck

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
662 KB
Volume
3
Category
Article
ISSN
1053-1807

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Ultrasonic surgery was performed in rabbits and dogs under the guidance of magnetic resonance (MR) imaging. Two different MR techniques were used to guide the ultrasound beam. T2‐weighted images showed lesion formation within a few minutes after sonication. T1‐weighted GRASS (gradient‐recalled acquisition in the steady state) images were sensitive to temperature elevations, permitting monitoring of lesion creation with MR imaging. Short TR T1‐weighted GRASS images were not as helpful in detecting temperature elevation because of a reduction in signal‐to‐noise ratio. T2‐weighted fast spin‐echo images were compared with conventional T2‐weighted spin‐echo images. The former produced high‐quality images in a fraction of the imaging time. This study shows that it is possible to monitor and guide ultrasonic surgery with MR imaging.

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