title: Validation of a radiotherapy treatment planning system using an anthropomorphic phantom and MTS-N thermoluminescent detectors.
abstract: A treatment planning system (TPS) was validated in conditions of simulated radiotherapy (RT) of an anthropomorphic tissue-equivalent phantom. Individually calibrated solid MTS-N (LiF:Mg,Ti) detectors were placed within the treatment volume in this phantom which was then repeatedly irradiated by external 60Co or 6 MV X ray beams. On the basis of TLD-measured depth-dose curves for the two beams, the relative accuracy of determining dose (of the order of 1 Gy) at live depths in a water phantom is about 0.4-0.6%. In the volume of interest representing the target volume, the relative standard difference between the calculated and measured dose values ranged between 1.3% and 2.2% for the 60Co and 6 MV X ray beams, respectively. The TPS-calculated uniformity of irradiation of that volume is within 1%. While fraction-to-fraction repeatability was within 1-2%, systematic underexposure around the reference point, by 2-3%, was found in two consecutive exposures by sets of both beams.
authors.affiliation: Centre of Oncology, Kraków, Poland. z5waligo@cyf-kr.edu.pl
authors.forename: M P R
authors.initials: MP
authors.lastname: Waligórski
authors.forename: P
authors.initials: P
authors.lastname: Bilski
authors.forename: J
authors.initials: J
authors.lastname: Lesiak
authors.forename: E
authors.initials: E
authors.lastname: Byrski
authors.forename: B
authors.initials: B
authors.lastname: Rozwadowska-Bogusz
authors.forename: R
authors.initials: R
authors.lastname: Barańczyk
authors.forename: E
authors.initials: E
authors.lastname: Góra
authors.forename: E
authors.initials: E
authors.lastname: Ochab
authors.forename: P
authors.initials: P
authors.lastname: Olko
mesh_terms: D000042:Absorption; D006801:Humans; D019047:Phantoms, Imaging; D011868:Radioisotopes / Q000493:pharmacokinetics* / Q000627:therapeutic use; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation / Q000379:methods*
chemical_list: D011868:Radioisotopes