Low-cost 3D print–based phantom fabrication to facilitate interstitial prostate brachytherapy training program

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: The purpose of this study was to manufacture a realistic and inexpensive prostate phantom to support training programs for ultrasound-based interstitial prostate brachytherapy. Methods and Materials: Five phantom material combinations were tested and evaluated for material characteristics; Ecoflex 00–30 silicone, emulsion silicone with 20% or 50% mineral oil, and regular or supersoft polyvinyl chloride (PVC). A prostate phantom which includes an anatomic simulated prostate, urethra, seminal vesicles, rectum, and normal surrounding tissue was created with 3D-printed molds using 20% emulsion silicone and regular and supersoft PVC materials based on speed of sound testing. Needle artifact retention was evaluated at weekly intervals. Results: Speed of sound testing demonstrated PVC to have the closest ultrasound characteristics of the materials tested to that of soft tissue. Several molds were created with 3D-printed PLA directly or cast on 3D-printed PLA with high heat resistant silicone. The prostate phantom fabrication workflow was developed, including a method to produce dummy seeds for low-dose-rate brachytherapy practice. A complete phantom may be fabricated in 1.5–2 h, and the material cost for each phantom was approximated at $23.98. Conclusions: A low-cost and reusable phantom was developed based on 3D-printed molds for casting. The proposed educational prostate phantom is an ideal cost-effective platform to develop and build confidence in fundamental brachytherapy procedural skills in addition to actual patient caseloads.

Original languageEnglish (US)
Pages (from-to)800-811
Number of pages12
JournalBrachytherapy
Volume19
Issue number6
DOIs
StatePublished - Nov 1 2020

Keywords

  • Brachytherapy
  • Brachytherapy simulation
  • Prostate cancer
  • Resident training

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging

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