title: Evaluation of mechanical accuracy for couch-based tracking system (CBTS).
abstract: This study evaluated the mechanical accuracy of an in-house-developed couch-based tracking system (CBTS) according to respiration data. The overall delay time of the CBTS was calculated, and the accuracy, reproducibility, and loading effect of the CBTS were evaluated according to the sinusoidal waveform and various respiratory motion data of real patients with and without a volunteer weighing 75kg. The root mean square (rms) error of the accuracy, the reproducibility, and the sagging measurements were calculated for the three axes (X, Y, and Z directions) of the CBTS. The overall delay time of the CBTS was 0.251 sec. The accuracy and reproducibility in the Z direction in real patient data were poor, as indicated by high rms errors. The results of the loading effect were within 1.0 mm in all directions. This novel CBTS has the potential for clinical application for tumor tracking in radiation therapy.
authors.affiliation: Department of Radiation Oncology, College of Medicine, Korea University, Seoul, Korea.
authors.forename: Suk
authors.initials: S
authors.lastname: Lee
authors.forename: Kyung-Hwan
authors.initials: KH
authors.lastname: Chang
authors.forename: Jand Bo
authors.initials: JB
authors.lastname: Shim
authors.forename: Yuanjie
authors.initials: Y
authors.lastname: Cao
authors.forename: Chang Ki
authors.initials: CK
authors.lastname: Lee
authors.forename: Sam Ju
authors.initials: SJ
authors.lastname: Cho
authors.forename: Dae Sik
authors.initials: DS
authors.lastname: Yang
authors.forename: Young Je
authors.initials: YJ
authors.lastname: Park
authors.forename: Won Seob
authors.initials: WS
authors.lastname: Yoon
authors.forename: Chul Yong
authors.initials: CY
authors.lastname: Kim
mesh_terms: D006801:Humans; D009068:Movement / Q000502:physiology*; D009369:Neoplasms / Q000000981:diagnostic imaging / Q000532:radiotherapy*; D010315:Particle Accelerators / Q000295:instrumentation*; D015203:Reproducibility of Results; D012119:Respiration; D014057:Tomography, X-Ray Computed