title: Performance of an improved first generation optical CT scanner for 3D dosimetry.
abstract: Performance analysis of a modified 3D dosimetry optical scanner based on the first generation optical CT scanner OCTOPUS is presented. The system consists of PRESAGE dosimeters, the modified 3D scanner, and a new developed in-house user control panel written in Labview program which provides more flexibility to optimize mechanical control and data acquisition technique. The total scanning time has been significantly reduced from initial 8 h to ∼2 h by using the modified scanner. The functional performance of the modified scanner has been evaluated in terms of the mechanical integrity uncertainty of the data acquisition process. Optical density distribution comparison between the modified scanner, OCTOPUS and the treatment plan system has been studied. It has been demonstrated that the agreement between the modified scanner and treatment plans is comparable with that between the OCTOPUS and treatment plans.
authors.affiliation: Department of Radiation Oncology, Columbia University, New York, NY, USA.
authors.forename: Xin
authors.initials: X
authors.lastname: Qian
authors.forename: John
authors.initials: J
authors.lastname: Adamovics
authors.forename: Cheng-Shie
authors.initials: CS
authors.lastname: Wuu
mesh_terms: D055096:Optical Devices; D019047:Phantoms, Imaging; D011874:Radiometry / Q000295:instrumentation*; D011880:Radiotherapy Planning, Computer-Assisted; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*