title: Application of a video-optical beam imaging system for quality assurance of medical accelerators.
abstract: Method validation techniques were developed and experiments were carried out using a beam imaging system (BIS, Wellhöfer Dosimetrie, Schwarzenbruck, Germany) for routine quality assurance of medical accelerators. The routine quality assurance tasks include x-ray beam flatness and symmetry check, light/radiation field congruence test, beam energy constancy for electrons and mechanical checks for couch and collimator rotations. Comparisons were made between the BIS application and conventional quality assurance methods that use radiographic films or detector arrays. In this work, we have demonstrated efficiency and accuracy of the BIS to perform some of the routine quality assurance tasks for medical linear accelerators.
authors.affiliation: Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore 21017, USA. lma001@umaryland.edu
authors.forename: L
authors.initials: L
authors.lastname: Ma
authors.forename: A L
authors.initials: AL
authors.lastname: Boyer
authors.forename: D O
authors.initials: DO
authors.lastname: Findley
authors.forename: P B
authors.initials: PB
authors.lastname: Geis
authors.forename: E
authors.initials: E
authors.lastname: Mok
mesh_terms: D004583:Electrons; D005373:Film Dosimetry; D008432:Mathematical Computing; D010315:Particle Accelerators / Q000592:standards*; D011786:Quality Control; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation; D011877:Radionuclide Imaging; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted; D011882:Radiotherapy, High-Energy / Q000592:standards*; D012588:Scintillation Counting; D014965:X-Rays