MR-gesteuerte Biopsien mit einer hochauflösenden schnellen T2-gewichteten Turbo-Spin-Echo-Sequenz LoLo : Erste klinische Erfahrungen

PURPOSE: The feasibility of the "LoLo"-technique for MR guidance of biopsy procedures was tested. MATERIAL AND METHODS: MR-guided biopsies were performed on 10 patients employing a 1.5 T system. The "LoLo"-technique used is a single shot turbo spin echo technique. Only a small field of view is covered in order to yield images with a resolution of 1 mm2 in 600 ms. The orthogonal orientation of the slice selective radio frequency pulses to each other prevents foldover artifacts. RESULTS: No complications occurred. All biopsy procedures yielded sufficient material to diagnose the underlying disease. The "LoLo"-technique enabled good depiction of the needle tip in all cases. T2-weighted contrast typical for turbo spin echo images was observed. No foldover artifacts were detectable. CONCLUSION: MR-guided biopsies are possible with the "LoLo"technique. Compared to gradient echo sequences T2-weighting and smaller susceptibility artifacts proved to be advantageous.