title: Development of a real-time internal and external marker tracking system for particle therapy: a phantom study using patient tumor trajectory data.
abstract: Target motion-induced uncertainty in particle therapy is more complicated than that in X-ray therapy, requiring more accurate motion management. Therefore, a hybrid motion-tracking system that can track internal tumor motion and as well as an external surrogate of tumor motion was developed. Recently, many correlation tests between internal and external markers in X-ray therapy have been developed; however, the accuracy of such internal/external marker tracking systems, especially in particle therapy, has not yet been sufficiently tested. In this article, the process of installing an in-house hybrid internal/external motion-tracking system is described and the accuracy level of tracking system was acquired. Our results demonstrated that the developed in-house external/internal combined tracking system has submillimeter accuracy, and can be clinically used as a particle therapy system as well as a simulation system for moving tumor treatment.
authors.affiliation: Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
authors.forename: Junsang
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Health Sciences and Technology,Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 135-710, Korea.
authors.forename: Wonjoong
authors.initials: W
authors.lastname: Cheon
authors.affiliation: Department of Health Sciences and Technology,Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 135-710, Korea.
authors.forename: Sanghee
authors.initials: S
authors.lastname: Ahn
authors.affiliation: Department of Health Sciences and Technology,Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 135-710, Korea.
authors.forename: Hyunuk
authors.initials: H
authors.lastname: Jung
authors.affiliation: School of Medicine, Sungkyunkwan University, Seoul 135-710, Korea.|GE Healthcare Korea, Seoul, 135-100, Korea.
authors.forename: Heesoon
authors.initials: H
authors.lastname: Sheen
authors.affiliation: Department of Radiation Oncology, Samsung Medical Center, SAIHST, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
authors.forename: Hee Chul
authors.initials: HC
authors.lastname: Park
authors.affiliation: Department of Radiation Oncology, Samsung Medical Center, SAIHST, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
authors.forename: Youngyih
authors.initials: Y
authors.lastname: Han
mesh_terms: D003199:Computer Systems; D006801:Humans; D009038:Motion; D009369:Neoplasms / Q000628:therapy*; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D013997:Time Factors
keywords: correlation; internal/external fiducials; marker tracking; patient external surface; respiratory gating