TY - JOUR
T1 - Evaluation of a 3D-printed heterogeneous anthropomorphic head and neck phantom for patient-specific quality assurance in intensity-modulated radiation therapy
AU - Kadoya, Noriyuki
AU - Abe, Kota
AU - Nemoto, Hikaru
AU - Sato, Kiyokazu
AU - Ieko, Yoshiro
AU - Ito, Kengo
AU - Dobashi, Suguru
AU - Takeda, Ken
AU - Jingu, Keiichi
N1 - Funding Information:
This study was supported in part by the Japan Society for the Promotion of Science Grant-in-Aid for Young Scientists (B) (15K19199).
Publisher Copyright:
© 2019, Japanese Society of Radiological Technology and Japan Society of Medical Physics.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - 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.
AB - 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.
KW - 3D printer
KW - Head and neck
KW - Phantom
KW - Quality assurance
KW - Radiotherapy
KW - Structured exercise
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U2 - 10.1007/s12194-019-00527-5
DO - 10.1007/s12194-019-00527-5
M3 - Article
C2 - 31364005
AN - SCOPUS:85069941646
SN - 1865-0333
VL - 12
SP - 351
EP - 356
JO - Radiological Physics and Technology
JF - Radiological Physics and Technology
IS - 3
ER -
