Evaluation of a 3D-printed heterogeneous anthropomorphic head and neck phantom for patient-specific quality assurance in intensity-modulated radiation therapy

Noriyuki Kadoya, Kota Abe, Hikaru Nemoto, Kiyokazu Sato, Yoshiro Ieko, Kengo Ito, Suguru Dobashi, Ken Takeda, Keiichi Jingu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We evaluated an anthropomorphic head and neck phantom with tissue heterogeneity, produced using a personal 3D printer, with quality assurance (QA), specific to patients undergoing intensity-modulated radiation therapy (IMRT). Using semi-automatic segmentation, 3D models of bone, soft tissue, and an air-filled cavity were created based on computed tomography (CT) images from patients with head and neck cancer treated with IMRT. For the 3D printer settings, polylactide was used for soft tissue with 100% infill. Bone was reproduced by pouring plaster into the cavity created by the 3D printer. The average CT values for soft tissue and bone were 13.0 ± 144.3 HU and 439.5 ± 137.0 HU, respectively, for the phantom and 12.1 ± 124.5 HU and 771.5 ± 405.3 HU, respectively, for the patient. The gamma passing rate (3%/3 mm) was 96.1% for a nine-field IMRT plan. Thus, this phantom may be used instead of a standard shape phantom for patient-specific QA in IMRT.

Original languageEnglish
Pages (from-to)351-356
Number of pages6
JournalRadiological Physics and Technology
Volume12
Issue number3
DOIs
Publication statusPublished - 2019 Sep 1

Keywords

  • 3D printer
  • Head and neck
  • Phantom
  • Quality assurance
  • Radiotherapy
  • Structured exercise

ASJC Scopus subject areas

  • Radiation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Radiology Nuclear Medicine and imaging

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