title: Three-dimensional radiochromic film dosimetry of proton clinical beams using a gafchromic EBT2 film array.
abstract: In this work, three-dimensional (3D) film-based proton beam measurements were used for the first time to verify the patient-specific radiation dose distribution, beam range and compensator shape. Three passively scattered proton beams and one uniform scanning proton beam were directed onto an acrylic phantom with inserted Gafchromic EBT films. The average gamma index for a comparison of the dose distributions was less than one for 97.2 % of all pixels from the passively scattered proton beams and 98.1 % of all pixels for the uniform scanning proton beams, with a 3 % dose and a 3 mm distance-to-dose agreement tolerance limit. The results also showed that the average percentage of points within the acceptance criteria for proton beam ranges was 94.6 % for the passively scattered proton beams. Both the dose distribution and the proton beam range determined by the 3D EBT film measurement agreed well with the planning system values.
authors.affiliation: Department of Radiation Oncology,  Samsung Medical Center, Seoul,  Korea.
authors.forename: Jinsung
authors.initials: J
authors.lastname: Kim
authors.forename: Myonggeun
authors.initials: M
authors.lastname: Yoon
authors.forename: Seonkyu
authors.initials: S
authors.lastname: Kim
authors.forename: Dongho
authors.initials: D
authors.lastname: Shin
authors.forename: Se Byeong
authors.initials: SB
authors.lastname: Lee
authors.forename: Young Kyung
authors.initials: YK
authors.lastname: Lim
authors.forename: Dong Wook
authors.initials: DW
authors.lastname: Kim
authors.forename: Sung Yong
authors.initials: SY
authors.lastname: Park
mesh_terms: D000369:Aged, 80 and over; D002138:Calibration; D002648:Child; D005373:Film Dosimetry / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional; D008875:Middle Aged; D009369:Neoplasms / Q000532:radiotherapy*; D019047:Phantoms, Imaging; D061766:Proton Therapy; D011874:Radiometry / Q000295:instrumentation / Q000379:methods*; D011879:Radiotherapy Dosage; D011522:Protons
chemical_list: D011522:Protons