Preliminary experience with interactive guided brain biopsies using a vertically opened 0.5-T MR system
| Autor: | P. Franke, S. Lieberenz, Ralf Schober, Jens P. Schneider, Volker Seifert, Frank Schmidt, Steffen Kellermann, J. Dietrich, O Sorge, Christos Trantakis |
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| Rok vydání: | 1999 |
| Předmět: |
Adult
Male medicine.medical_specialty Lymphoma Brain Abscess Astrocytoma Whole systems Diagnosis Differential Biopsy Humans Medicine Radiology Nuclear Medicine and imaging Aged Neuroradiology Medical systems medicine.diagnostic_test Brain Neoplasms business.industry Brain biopsy Biopsy Needle Brain Reproducibility of Results Magnetic resonance imaging Interventional radiology General Medicine Middle Aged Image enhancement Image Enhancement Magnetic Resonance Imaging Feasibility Studies Female Radiology Glioblastoma business |
| Zdroj: | European Radiology. 9:230-236 |
| ISSN: | 1432-1084 0938-7994 |
| DOI: | 10.1007/s003300050660 |
| Popis: | The purpose of our study was to evaluate the feasibility and accuracy of brain biopsies performed within a vertically opened MR system. We worked with the interventional 0.5-T MR "SIGNA SP" (General Electric Medical Systems, Milwaukee, Wis.) with an integrated tracking device "Flashpoint Position Encoder" (Image Guided Technologies, USA). As a holding device for this instrument we constructed a special frame. The whole system allows an exact adjustment of an optimum biopsy direction and guidance of the biopsy in a non-stereotactic, interactive mode in near real-time. As biopsy tools we used MR-compatible aspiration and specially made side-cut needles (Daum, Germany; E-Z-EM, USA). We performed a prospective diagnostic brain biopsy study in 18 patients. Guidance of the needle was carried out using gradient-echo single-slice technique. The sample was taken after controlling the exact position of the needle tip on spin-echo images. In 12 cases an exact neuropathological diagnosis was possible. In 6 cases of negative biopsy (4 aspiration biopsies) the samples were not representative. Our results demonstrate the feasibility of interactive MR-guided minimally invasive brain biopsies in an open MR system. The best results were achieved using cut needles for biopsies of contrast-enhancing lesions visible on T1-weighted gradient-echo guidance sequence. |
| Databáze: | OpenAIRE |
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