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Related Experiment Video

Updated: May 9, 2026

Transperineal Prostate Biopsy Using a Cone-shaped Double-hole Method with Dual-plane Probe Guidance
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Improving accuracy in image-guided prostate biopsy by using trocar-sharpened needles.

Timur H Kuru1, Tobias Simpfendörfer, Matthias Roethke

  • 1Department of Urology, University Hospital Heidelberg, Heidelberg, Germany.

Urologia Internationalis
|July 11, 2013
PubMed
Summary

Trocar-sharpened needles significantly reduce targeting errors in image-guided prostate biopsies compared to conventional beveled needles. This novel needle design enhances accuracy for precise lesion assessment.

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Area of Science:

  • Medical Imaging
  • Surgical Technology
  • Urology

Background:

  • Image-guided biopsies are crucial for accurate prostate cancer diagnosis.
  • Conventional beveled needles can deviate during biopsy, potentially increasing targeting error.
  • Optimizing needle design is essential for improving biopsy accuracy.

Purpose of the Study:

  • To evaluate the efficacy of trocar-sharpened needles in minimizing procedural targeting error (PTE) during stereotactic prostate biopsies.
  • To compare the accuracy of trocar-sharpened needles against conventional beveled needles in a phantom model.

Main Methods:

  • Stereotactic biopsies were performed on prostate phantoms with simulated lesions.
  • Biopsies were conducted using both conventional beveled and novel trocar-sharpened needles under live ultrasound guidance.

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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
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Last Updated: May 9, 2026

Transperineal Prostate Biopsy Using a Cone-shaped Double-hole Method with Dual-plane Probe Guidance
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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
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  • Procedural targeting error (PTE) was calculated by comparing planned and actual needle trajectories.

    • Main Results:

    • The novel trocar-sharpened needles demonstrated a significantly lower absolute overall targeting error (0.13 mm) compared to beveled needles.
    • A statistically significant difference in PTE was observed in the axial plane (p=0.03) favoring the trocar-sharpened needles.
    • The highest PTE for trocar needles was in the sagittal plane (0.18 ± 0.16 mm).

    Conclusions:

    • Trocar-sharpened needles significantly reduce targeting error in stereotactic biopsies.
    • This improved accuracy facilitates precise assessment of suspicious prostate lesions.
    • The findings suggest trocar-tip configurations enhance computer-assisted biopsies for various organs.