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Tytuł pozycji:

In-bore biopsies of the prostate assisted by a remote-controlled manipulator at 1.5 T.

Tytuł:
In-bore biopsies of the prostate assisted by a remote-controlled manipulator at 1.5 T.
Autorzy:
Linder, Nicolas
Schaudinn, Alexander
Petersen, Tim-Ole
Bailis, Nikolaos
Stumpp, Patrick
Horn, Lars-Christian
Stolzenburg, Jens-Uwe
Kahn, Thomas
Moche, Michael
Busse, Harald
Temat:
ENDORECTAL ultrasonography
PROSTATE biopsy
EXOCRINE glands
Źródło:
MAGMA: Magnetic Resonance Materials in Physics, Biology & Medicine; Oct2019, Vol. 32 Issue 5, p599-605, 7p
Czasopismo naukowe
Purpose: To evaluate the technical and clinical utility of a fully MRI-compatible, pneumatically driven remote-controlled manipulator (RCM) for targeted biopsies of the prostate at 1.5 T. Materials and methods: The data of the first 22 patients that were biopsied under robotic assistance were analyzed. Interventional planning relied on T2-weighted (T2w) turbo spin-echo (TSE) images (axial and sagittal) with a high-b-value diffusion-weighted acquisition added in selected cases. Alignment of the needle guide was controlled with a short balanced SSFP sequence in two oblique planes along the MR-visible sheath. Signals were acquired with a combination of elements from a 30-channel body and a 32-channel spine coil. Biopsy samples were taken with a fully automatic 18-G biopsy gun with a length of 150 or 175 mm. Results: Mean age was 66.6 years and average PSA level was 11.5 ng/ml. Fourteen out of 22 patients (63%) had received prior biopsies under transrectal ultrasound guidance. Diagnostic MRI reports (before biopsy) involved 17 cases with a single suspicious finding (four PI-RADS 3, one PI-RADS 3–4, eight PI-RADS 4 and nine PI-RADS 5 cases). The median effective procedure time was 33.9 (range 25.0–55.9) min for 16 cases with one CSR and 63.4 (52.7–81.8) min for 5 cases with two CSRs. The biopsy with three CSRs took 74.0 min. Histopathologic examination revealed prostate cancer in 14 of 22 cases. Conclusion: MR-targeted, transrectal biopsy of the prostate could be reliably performed with a robotic manipulator at a field strength of 1.5 T. Balanced SSFP imaging is considered a viable option for fast procedural control. Follow-up work needs to evaluate to what extent in-bore adjustments and workflow enhancements will contribute to shorter procedure times or higher patient comfort. [ABSTRACT FROM AUTHOR]
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