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[MR-guided biopsies with high-resolution ultrafast T2-weighted turbo spin-echo sequence LoLo: initial clinical
A Bücker1, G Adam, J M Neuerburg
1Klinik für Radiologische Diagnostik, Medizinische Fakultät der Rheinisch-Westfälischen Technischen Hochschule Aachen.
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.