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- Title
Magnetic resonance-guided upper abdominal biopsies in a high-field wide-bore 3-T MRI system: feasibility, handling, and needle artefacts.
- Authors
Kühn JP; Langner S; Hegenscheid K; Evert M; Kickhefel A; Hosten N; Puls R; Kühn, Jens-Peter; Langner, Sönke; Hegenscheid, Katrin; Evert, Matthias; Kickhefel, Antje; Hosten, Norbert; Puls, Ralf
- Abstract
<bold>Objective: </bold>To investigate the feasibility and handling of abdominal MRI-guided biopsies in a 3-T MRI system.<bold>Methods: </bold>Over a 1-year period, 50 biopsies were obtained in 47 patients with tumours of the upper abdominal organs guided by 3-T MRI with a large-bore diameter of 70 cm. Lesions in liver (47), spleen (1) and kidney (2) were biopsied with a coaxial technique using a 16-G biopsy needle guided by a T1-weighted three-dimensional gradient recalled echo volumetric interpolated breath-hold examination (T1w-3D-GRE-VIBE) sequence. Sensitivity, specificity, accuracy, complication rate, interventional complexity, room/intervention time and needle artefacts were determined.<bold>Results: </bold>A sensitivity of 0.93, specificity of 1.0 and accuracy of 0.94 were observed. Three patients required a rebiopsy. There was a minor complications rate of 13.6%, and no major complications were observed. Histopathology revealed 38 malignant lesions, and 3-month follow-up confirmed 9 benign lesions. Mean lesion diameter was 3.4 ± 3.1 cm (50% being smaller than 2 cm). Mean needle tract length was 10.8 ± 3.3 cm. Median room time was 42.0 ± 19.8 min and intervention time 9.3 ± 8.1 min. Needle artefact size was about 9-fold greater for perpendicular access versus access parallel to the main magnetic field.<bold>Conclusion: </bold>Biopsies of the upper abdomen can be performed with great technical success and easy handling because of the large-bore diameter. The MRI-guided biopsy needle had an acceptable susceptibility artefact at 3 T. However future research must aim to reduce the susceptibility effects of the biopsy systems.
- Publication
European Radiology, 2010, Vol 20, Issue 10, p2414
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-010-1809-4