Efficacy of patient-specific bolus created using three-dimensional printing technique in photon radiotherapy

被引:36
|
作者
Fujimoto, Koya [1 ,2 ]
Shiinoki, Takehiro [1 ]
Yuasa, Yuki [1 ,2 ]
Hanazawa, Hideki [1 ]
Shibuya, Keiko [1 ]
机构
[1] Yamaguchi Univ, Grad Sch Med, Dept Radiat Oncol, 1-1-1 Minamikogushi, Yamaguchi 7558535, Japan
[2] Yamaguchi Univ, Dept Radiol Technol, 1-1-1 Minamikogushi, Yamaguchi 7558535, Japan
来源
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS | 2017年 / 38卷
关键词
Bolus; 3D printing; Photon radiotherapy; Acrylonitrile butadiene styrene (ABS); ELECTRON BOLUS; BEAM RADIOTHERAPY; FABRICATION; THERAPY; DESIGN;
D O I
10.1016/j.ejmp.2017.04.023
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: A commercially available bolus ("commercial-bolus") does not make complete contact with the irregularly shaped patient skin. This study aims to customise a patient-specific three-dimensional (3D) bolus using a 3D printing technique ("3D-bolus") and to evaluate its clinical feasibility for photon radiotherapy. Methods: The 3D-bolus was designed using a treatment planning system (TPS) in Digital Imaging and Communications in Medicine-Radiotherapy (DICOM-RT) format, and converted to stereolithographic format for printing. To evaluate its physical characteristics, treatment plans were created for water-equivalent phantoms that were bolus-free, or had a flat-form printed 3D-bolus, a TPS-designed bolus ("virtual-bolus"), or a commercial-bolus. These plans were compared based on the percentage depth dose (PDD) and target-volume dose volume histogram (DVH) measurements. To evaluate the clinical feasibility, treatment plans were created for head phantoms that were bolus-free or had a 3D-bolus, a virtual-bolus, or a commercial-bolus. These plans were compared based on the target volume DVH. Results: In the physical evaluation, the 3D-bolus provided effective dose coverage in the build-up region, which was equivalent to the commercial-bolus. With regard to the clinical feasibility, the air gaps were lesser with the 3D-bolus when compared to the commercial-bolus. Furthermore, the prescription dose could be delivered appropriately to the target volume. The 3D-bolus has potential use for air-gap reduction compared to the commercial-bolus and facilitates target-volume dose coverage and homogeneity improvement. Conclusions: A 3D-bolus produced using a 3D printing technique is comparable to a commercial-bolus applied to an irregular-shaped skin surface. (C) 2017 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1 / 9
页数:9
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