O13. A comparison of TPS commissioning dosimeters

Purpose: Commissioning of a linear accelerator is a process of acquiring a set of data used for patient treatment. This article presents the beam data measurement results from the commissioning of a VitalBeamTM linac. Materials and Methods: Dosimetric properties for 6,10, and 15 MV photon beams and 6, 9, 12, and 16 MeV electron beams have been performed. Parameters, including Percentage Depth Dose (PDD), depth dose profile, symmetry, flatness, quality index, output factors, and the vital data for Treatment Planning System (TPS) commissioning were measured. The imported data were checked by CIRS phantom accordingly to IAEA TRS-430, TECDOC. Eight different positions of CIRS phantom CT were planned and treated. Finally, the calculated dose at a determined position was compared with measuring data to TPS validation. Results: After comparing 84 points in a different plan, the 83 points were in agreement with the criteria, and just for one point in 15 MV failed. Conclusion: Commissioning of dose and field flatness and symmetry are in tolerance intervals given by Varian. This proves that the studied lines meet the specification and can be used in clinical practice with all available electron and photon energies.

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WE-C-AUD C-01: The Extraction of True Profiles for TPS Commissioning and Its Impact On IMRT Patient-Specific QA

Medical Physics ◽

10.1118/1.2962698 ◽

2008 ◽

Vol 35 (6Part23) ◽

pp. 2935-2935

Author(s):

G Yan ◽

C Fox ◽

C Liu ◽

JG Li

Keyword(s):

Patient Specific ◽

Tps Commissioning ◽

Patient Specific Qa

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SU-F-T-49: Dosimetry Parameters and TPS Commissioning for the CivaSheet Directional Pd-103 Brachytherapy Source

Medical Physics ◽

10.1118/1.4956184 ◽

2016 ◽

Vol 43 (6Part13) ◽

pp. 3472-3472

Author(s):

MJ Rivard

Keyword(s):

Tps Commissioning ◽

Brachytherapy Source

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TU-D-BRA-01: TPS Commissioning and QA: Planning and Monitoring

Medical Physics ◽

10.1118/1.4957486 ◽

2016 ◽

Vol 43 (6Part34) ◽

pp. 3746-3746

Author(s):

G. Salomons

Keyword(s):

Tps Commissioning

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On the sensitivity of TG-119 and IROC credentialing to TPS commissioning errors

Journal of Applied Clinical Medical Physics ◽

10.1120/jacmp.v17i1.5452 ◽

2016 ◽

Vol 17 (1) ◽

pp. 34-48 ◽

Cited By ~ 5

Author(s):

Drew McVicker ◽

Fang-Fang Yin ◽

Justus D. Adamson

Keyword(s):

Tps Commissioning

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Evaluation of Calculation Algorithms for photon Beam dose in Heterogeneous Medium

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v9i2.1405 ◽

2015 ◽

Vol 9 (2) ◽

pp. 2378-2387

Author(s):

G.S. Hassan ◽

Saleh A. Mohamed ◽

Khaled M. Elshahat

Keyword(s):

Heterogeneous Medium ◽

Dose Calculation ◽

Planning System ◽

Treatment Planning System ◽

Calculation Algorithms ◽

Tps Commissioning ◽

Dose Calculation Algorithms ◽

Dosimetry System ◽

Pencil Beam Algorithm ◽

Beam Dose

The success of the implementations of a radiotherapy treatment planning system is determined by the ability of the dose calculation algorithms to reproduce the algorithm input data, and in most cases the agreement was found within Â±2%. Varian linear accelerator DMX, TPS Eclipse (version 10.33) is used and absolute dosimetry and relative dosimetry system (PTW, Freiburg, Germany) and 2D array were also used. The Calculation of Analytical Anisotropic Algorithm (AAA) is more accurate than the Pencil beam Algorithm (PBC) in heterogeneity medium in comparison with practical measurement. The extent of the effort required to carry out a validation study of the complexity of that described here precludes its use as a routine component of TPS commissioning. Our realistic recommendation is that commissioning includes tests aimed at confirming that raw beam data have been entered correctly and that the operation of the system is understood. Finally, the study tell us that the observed deviations between TPS calculated using Eclipse version 10.33 and measured dose in the present of heterogeneous medium are well within the tolerance levels and the study also show that the use of Eclipse (version 10.33) TPS, AAA algorithm records significant improvement than the previous TPS versions especially in the present of low density inhomogeneity.

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