UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 17:14

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Biophysics; Medical Physics


Title:
Evaluation of the commissioning of the treatment planning system in radiotherapy using specific anthropomorphic phantoms


Authors:
Iuliana TARAN(1), Mihai DUMITRACHE(2), Alexandru JIPA(1)


Affiliation:
1) Faculty of Physics, University of Bucharest

2) Dr. Carol Davila Central Military Emergency University Hospital


E-mail
iuliana.taran5@gmail.com


Keywords:
Commissioning, treatment planning system, anthropomorphic phantoms


Abstract:
Quality Assurance (QA) in the radiotherapy treatment planning process is important to ensure accurate dose delivery to the patient and to minimize the possibility of accidental exposure. The process of commissioning involves testing of system functions, documentation of the different capabilities and verification of the ability of the dose calculation algorithms to reproduce measured dose and also, it represents one of the most important parts of the entire QA programme for both the RTPS and the planning process. The procedures for clinical commissioning tests described in this paper are based on the use of the recommandations of the IAEA-TECDOC-1583 and on the use of the CIRS phantom Model 002LFC. During clinical commissioning tests the RTPS performance will be verified for typical conventional and conformal radiotherapy techniques, including the comparison of dose calculation results and measured values for an inhomogeneous anthropomorphic phantom, and the MU calculation checks. Prior to this, the HU-RED curve was evaluated. The tests are structured so that at first, the dose distributions for single beams are considered, then standard multiple field techniques are used, and finally complex multi-field arrangements are applied. The objectiv of this testing is to confirm that the logistic chain beginning from CT scanning, anatomic modelling, treatment planning and monitor unit calculation is operable for typical techniques and leads to the desired results with sufficient accuracy.


References:

Commissioning of Radiotherapy Treatment Planning Systems:Testing for Typical External Beam Treatment Techniques (IAEA-TECDOC-1583)