title: A software tool to automatically assure and report daily treatment deliveries by a cobalt-60 radiation therapy device.
abstract: The aims of this study were to develop a method for automatic and immediate verification of treatment delivery after each treatment fraction in order to detect and correct errors, and to develop a comprehensive daily report which includes delivery verification results, daily image-guided radiation therapy (IGRT) review, and information for weekly physics reviews. After systematically analyzing the requirements for treatment delivery verification and understanding the available information from a commercial MRI-guided radiotherapy treatment machine, we designed a procedure to use 1) treatment plan files, 2) delivery log files, and 3) beam output information to verify the accuracy and completeness of each daily treatment delivery. The procedure verifies the correctness of delivered treatment plan parameters including beams, beam segments and, for each segment, the beam-on time and MLC leaf positions. For each beam, composite primary fluence maps are calculated from the MLC leaf positions and segment beam-on time. Error statistics are calculated on the fluence difference maps between the plan and the delivery. A daily treatment delivery report is designed to include all required information for IGRT and weekly physics reviews including the plan and treatment fraction information, daily beam output information, and the treatment delivery verification results. A computer program was developed to implement the proposed procedure of the automatic delivery verification and daily report generation for an MRI guided radiation therapy system. The program was clinically commissioned. Sensitivity was measured with simulated errors. The final version has been integrated into the com-mercial version of the treatment delivery system. The method automatically verifies the EBRT treatment deliveries and generates the daily treatment reports. Already in clinical use for over one year, it is useful to facilitate delivery error detection, and to expedite physician daily IGRT review and physicist weekly chart review.
authors.affiliation: Washington University in St. Louis. dyang@radonc.wustl.edu.
authors.forename: Deshan
authors.initials: D
authors.lastname: Yang
authors.forename: H Omar
authors.initials: HO
authors.lastname: Wooten
authors.forename: Olga
authors.initials: O
authors.lastname: Green
authors.forename: Harold H
authors.initials: HH
authors.lastname: Li
authors.forename: Shi
authors.initials: S
authors.lastname: Liu
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Li
authors.forename: Vivian
authors.initials: V
authors.lastname: Rodriguez
authors.forename: Sasa
authors.initials: S
authors.lastname: Mutic
authors.forename: Rojano
authors.initials: R
authors.lastname: Kashani
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011785:Quality Assurance, Health Care / Q000592:standards*; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods* / Q000592:standards; D050397:Radiotherapy, Intensity-Modulated / Q000295:instrumentation / Q000379:methods* / Q000592:standards; D011996:Records / Q000592:standards*; D012984:Software
chemical_list: D003037:Cobalt Radioisotopes