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Transperineal Prostate Biopsy under Magnetic Resonance Image Guidance: A Needle Placement Accuracy Study
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Institution: |
Department of Radiology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA. |
Publisher: |
Wiley-Liss, Inc. |
Publication Date: |
Sep-2007 |
Volume Number: |
26 |
Issue Number: |
3 |
Pages: |
688-694 |
Citation: |
J Magn Reson Imaging. 2007 Sep;26(3):688-94. |
PubMed ID: |
17729363 |
Keywords: |
intraoperative MRI, biopsy, prostate, needle misplacement, accuracy assessment |
Appears in Collections: |
NCIGT, Prostate Group, SNR |
Sponsors: |
NIH 1 R01 CA111288 NIH 5 R01 EB002963 NIH 5 P01 CA067165 NIH 5 U41 RR019703 NSF EEC 9731748 |
Generated Citation: |
Blumenfeld P., Hata N., Dimaio S.P., Zou K.H., Haker S., Fichtinger G., Tempany C.M. Transperineal Prostate Biopsy under Magnetic Resonance Image Guidance: A Needle Placement Accuracy Study. J Magn Reson Imaging. 2007 Sep;26(3):688-94. PMID: 17729363. |
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To quantify needle placement accuracy of magnetic resonance image (MRI)-guided core needle biopsy of the prostate. MATERIALS AND METHODS: A total of 10 biopsies were performed with 18-gauge (G) core biopsy needle via a percutaneous transperineal approach. Needle placement error was assessed by comparing the coordinates of preplanned targets with the needle tip measured from the intraprocedural coherent gradient echo images. The source of these errors was subsequently investigated by measuring displacement caused by needle deflection and needle susceptibility artifact shift in controlled phantom studies. Needle placement error due to misalignment of the needle template guide was also evaluated. RESULTS: The mean and standard deviation (SD) of errors in targeted biopsies was 6.5±3.5 mm. Phantom experiments showed significant placement error due to needle deflection with a needle with an asymmetrically beveled tip (3.2-8.7 mm depending on tissue type) but significantly smaller error with a symmetrical bevel (0.6-1.1 mm). Needle susceptibility artifacts observed a shift of 1.6±0.4 mm from the true needle axis. Misalignment of the needle template guide contributed an error of 1.5±0.3 mm. CONCLUSION: Needle placement error was clinically significant in MRI-guided biopsy for diagnosis of prostate cancer. Needle placement error due to needle deflection was the most significant cause of error, especially for needles with an asymmetrical bevel.
Additional Material
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Blumenfeld-JMRI2007-fig1.jpg (126.461kB)