| Performing MR-guided biopsies in clinical routine: factors that influence accuracy and procedure time. | |
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MedLine Citation:
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PMID: 21960160 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: To assess the accuracy, the duration and factors that influence the duration of MRI-guided liver or soft-tissue biopsies. METHODS: Nineteen liver biopsies and 19 soft-tissue biopsies performed using 1.5T-MRI guidance were retrospectively analysed. Diagnostic performance and complications were assessed. Intervention time was subdivided into preparation period, puncture period and control period. Correlation between procedure time and target size, skin-to-target-distance, used sequences and interventionalists' experience were analysed. RESULTS: Overall sensitivity, specificity and accuracy were 0.86, 1.0 and 0.92, respectively. Two minor complications occurred. Overall median procedure time was 103.5 min. Liver biopsies lasted longer than soft-tissue biopsies (mean([soft-tissue]): 73.0 min, mean([liver]): 134.1 min, P < 0.001). The most time consuming part was the preparation period in both, soft-tissue and liver biopsies corresponding to 59.6% and 47.4% of the total intervention time, respectively. Total procedure time in liver biopsies (P = 0.027) and puncture period in liver and soft-tissue biopsies (P ([liver]) = 0.048, P ([soft-tissue]) = 0.005) was significantly prolonged for longer skin-to-target-distances. Lower numbers of image acquisitions (P ([liver]) = 0.0007, P ([soft-tissue]) = 0.0012) and interventionalists' experience reduces the procedure duration significantly (P < 0.05), besides all false-negative results appeared during the first five biopsies of each individual radiologist. CONCLUSION: The interventionalists' experience, skin-to-target-distances and number of image acquisition influence the procedure time significantly. KEY POINTS : •Appropriate training and supervision is essential for inexperienced interventionalists. •Two perpendicular image orientations should confirm the correct biopsy needle position. •Communication between interventionalist and technician is essential for a fluent biopsy procedure. •To shorten intervention time appropriate previous imaging is essential. |
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Authors:
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Rüdiger Hoffmann; Christoph Thomas; Hansjörg Rempp; Diethard Schmidt; Philippe L Pereira; Claus D Claussen; Stephan Clasen |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-30 |
Journal Detail:
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Title: European radiology Volume: - ISSN: 1432-1084 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9114774 Medline TA: Eur Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Diagnostic and Interventional Radiology, University of Tübingen, Hoppe-Seyler-Strasse 3, 72076, Tübingen, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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