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Related Experiment Videos

Prostatic conformal brachytherapy: 125I/103Pd postoperative dosimetric analysis

G S Merrick1, W M Butler, A T Dorsey

  • 1Schiffler Oncology Center, Wheeling Hospital, WV 26003, USA. oncology@hgo.net

Radiation Oncology Investigations
|January 1, 1997
PubMed
Summary

This study demonstrates that transperineal ultrasound conformal prostate brachytherapy can be successfully replicated in community hospitals. The technique achieves excellent dose coverage and comparable outcomes to specialized centers, with acceptable toxicity for prostate cancer treatment.

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Area of Science:

  • Urology
  • Radiation Oncology
  • Medical Physics

Background:

  • Replicating the success of Seattle's prostate brachytherapy requires demonstrating technical quality is achievable elsewhere.
  • Transperineal ultrasound-guided conformal brachytherapy offers precise radiation delivery for prostate cancer.

Purpose of the Study:

  • To assess the reproducibility and dosimetric quality of transperineal ultrasound conformal prostate brachytherapy in a community hospital setting.
  • To compare outcomes with established results from specialized centers.

Main Methods:

  • Preplanning utilized a modified uniform loading algorithm with low-activity seeds.
  • Transverse and longitudinal ultrasound with contrast-enhanced fluoroscopy guided implant placement.
  • Postoperative dosimetric analysis of 125I and 103Pd implants in 12 patients with T1/T2 prostate cancer.

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Main Results:

  • Median prostate volume coverage to the minimal peripheral dose (mPD) was 96%.
  • Isodose coverage at 80% of mPD reached 100% of the prostate volume.
  • Median maximal urethral dose was 175% of mPD; rectal mucosa dose was 105% of mPD.

Conclusions:

  • High-quality transperineal ultrasound conformal prostate brachytherapy is reproducible in community hospitals.
  • Achieved dosimetric parameters suggest comparable biochemical no evidence of disease (NED) and local control rates to specialized centers.
  • No unexpected urethral or rectal complications were observed.