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방사선치료 시 환자자세 검증을 위한 분석용 도구 개발

Other Titles
 Patients Setup Verification Tool for RT (PSVTS) : DRR, Simulation, Portal and Digital images 
Authors
 이석  ;  성진실  ;  서창옥  ;  이창걸  ;  추성실  ;  권수일 
Citation
 Journal of the Korean Society for Therapeutic Radiology and Oncology, Vol.21(1) : 100-106, 2003 
Journal Title
Journal of the Korean Society for Therapeutic Radiology and Oncology(대한방사선종양학회지)
ISSN
 1229-8719 
Issue Date
2003
MeSH
영상융합
Keywords
환자자세검증 ; 디지털화재구성사진 ; 포탈영상 ; 디지털영상 ; 영상융합
Abstract
Purpose : To develop a patients' setup verification tool (PSVT) to verify the alignment of the machine and the target isocenters, and the reproduclbility of patients' setup for three dimensional conformal radiotherapy (3DCRT) and intensity modulated radiotherapy (IMRT). The utilization of this system is evaluated through phantom and patient case studies. Materials and methods : We developed and clinically tested a new method for patients' setup verification, using digitally reconstructed radiography (DRR), simulation, porial and digital images. The PSVT system was networked to a Pentium PC for the transmission of the acquired images to the PC for analysis. To verify the alignment of the machine and target isocenters, orthogonal pairs of simulation images were used as verification images. Errors in the isocenter alignment were measured by comparing the verification images with DRR of CT Images. Orthogonal films were taken of all the patients once a week. These verification films were compared with the DRR were used for the treatment setup. By performing this procedure every treatment, using humanoid phantom and patient cases, the errors of localization can be analyzed, with adjustments made from the translation. The reproducibility of the patients' setup was verified using portal and digital images. Results : The PSVT system was developed to verify the alignment of the machine and the target isocenters, and the reproducibility of the patients' setup for 3DCRT and IMRT. The results show that the localization errors are 0.8±0.2 mm (AP) and 1.0±0.3 mm (Lateral) in the cases relating to the brain and 1.1±0.5 mm (AP) and 1.0±0.6 mm (Lateral) in the cases relating to the pelvis. The reproducibility of the patients' setup was verified by visualization, using real-time image acquisition, leading to the practical utilization of our software Conclusions : A PSVT system was developed for the verification of the alignment between machine and the target isocenters, and the reproduclbility of the patients' setup in 3DCRT and IMRT. With adjustment of the completed GUI-based algorithm, and a good quality DRR image, our software may be used for clinical applications.
Files in This Item:
T200306293.pdf Download
DOI
OAK-2003-01182
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Suh, Chang Ok(서창옥)
Seong, Jin Sil(성진실) ORCID logo https://orcid.org/0000-0003-1794-5951
Lee, Chang Geol(이창걸) ORCID logo https://orcid.org/0000-0002-8702-881X
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/114342
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