연세대 / 천보위, 이세형, 한민철*, 민철희*
Abstract
Purpose: Tetrahedral mesh (TM)-based computational human phantoms have recently been developed for evaluation of exposure dose with the merit of precisely representing human anatomy and the changing posture freely. However, conversion of recently developed TM phantoms to the Digital Imaging and Communications in Medicine (DICOM) file format, which can be utilized in the clinic, has not been attempted. The aim of this study was to develop a technique, called TET2DICOM, to convert the TM phantoms to DICOM datasets for accurate treatment planning.
Materials and methods: The TM phantoms were sampled in voxel form to generate the DICOM computed tomography images. The DICOM-radiotherapy structure was defined based on the contour data. To evaluate TET2DICOM, the shape distortion of the TM phantoms during the conversion process was assessed, and the converted DICOM dataset was implemented in a commercial treatment planning system (TPS).
Results: The volume difference between the TM phantoms and the converted DICOM dataset was evaluated as less than about 0.1% in each organ. Subsequently, the converted DICOM dataset was successfully implemented in MIM (MIM Software Inc., Cleveland, USA, version 6.5.6) and RayStation (RaySearch Laboratories, Stockholm, Sweden, version 5.0). Additionally, the various possibilities of clinical application of the program were confirmed using a deformed TM phantom in various postures.
Conclusion: In conclusion, the TM phantom, currently the most advanced computational phantom, can be implemented in a commercial TPS and this technique can enable various TM-based applications, such as evaluation of secondary cancer risk in radiotherapy.
Affiliations
Bo-Wi Cheon 1 , Se Hyung Lee 2 3 , Min Cheol Han 4 , Chul Hee Min 1 , Haegin Han 2 , Chan Hyeong Kim 2 , Jin Sung Kim 4
1 Department of Radiation Convergence Engineering, Yonsei University, Wonju, Korea.
2 Department of Nuclear Engineering, Hanyang University, Seoul, Korea.
3 Department of Radiation Oncology, Bundang Jesaeng General Hospital, Seongnam, Korea.
4 Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Korea.
편집위원
국내에 디지털 휴먼팬톰 분야의 상당한 기술을 보유하고 있는 것으로 알고 있는데, 사면체를 기반으로한 디지털 팬톰을 구성해서 상용프로그램에 여러 가지 자세로 적용될 수 있음을 보였다. 앞으로 디지털 팬톰을 사용한 응용분야가 기대된다.
2022-01-05 13:42:02