Stefan Zangos MD, Presenter: Nothing to Disclose

Martin Georg Mack MD, Abstract Co-Author: Nothing to Disclose

Katrin Eichler MD, Abstract Co-Author: Nothing to Disclose

Thomas Lehnert MD, Abstract Co-Author: Nothing to Disclose

Cindy Mueller MD, Abstract Co-Author: Nothing to Disclose

Thomas Josef Vogl MD, Abstract Co-Author: Nothing to Disclose

The purpose of this study was to examine the feasibility and safety of MR-guided biopsies in patients with suspicious lesions using a new MR-compatible assistance system in a high-field MR system.

25 patients with suspicious focal prostate lesions detected by high-field MR imaging and 5 patients with retroperitoneal lesions were biopsied in a high-field MR system (1.5 T, Sonata, Siemens) using a new MR-compatible assistance system (Innomotion; Innomedic; Herxheim). The procedures were guided using T1-weighted FLASH and T2-weighted TSE sequences. Servopneumatic drives move the AMO to the insertion point. The physician introduced the puncture needle manually and biopsies were taken in coaxial technique through a 15-gauge pencil tip with a 16-gauge biopsy handy. Complications and biopsy findings were documented.

An accurate puncture was easily performed using this new system in a high-field system. Pathological findings revealed sufficient probes in 29 cases and insufficient material in 1 case, due to technical problems with the biopsy device. This problem was corrected with a modification of the software. No side effects or complications due to the system or the procedure were observed in all patients. The T2-weighted images are superior for the evaluation of the anatomy and the needle position during the interventions.

MR-guided biopsies for histological clarification of suspicious prostate or retroperitoneal lesions using the new MR-compatible assistance system are practicable for accurate needle placement in high-field MR systems.

Performing MR-guided biopsies using the new MR-compatible assistance system Inomotion are practicable with accurate needle placement in high-field MR systems.

Zangos, S, Mack, M, Eichler, K, Lehnert, T, Mueller, C, Vogl, T, Technique and Results of High-field MR-guided Biopsies of the Prostate Gland and the Retroperitoneal Space with a New MR-compatible Assistance System.  Radiological Society of North America 2009 Scientific Assembly and Annual Meeting, November 29 - December 4, 2009 ,Chicago IL. http://archive.rsna.org/2009/8011727.html