Comparative Analysis of Different Measurement Techniques for MLC Characterization: Preliminary Results

Journal Article · Mon Aug 11 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2979309· OSTI ID:21149298

Larraga-Gutierrez, J M; Ballesteros-Zebadua, P; Garcia-Garduno, O A ^[1]; Martinez-Davalos, A; Rodriguez-Villafuerte, M ^[2]; Moreno-Jimenez, S; Celis, M A ^[3]

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1. Laboratorio de Fisica Medica, Instituto Nacional de Neurologia y Neurocirugia, Insurgentes Sur 3877, Tlalpan, 14269, Mexico D. F. (Mexico)
2. Instituto de Fisica, UNAM, Ciudad Universitaria, 04510, Mexico, D. F. (Mexico)
3. Unidad de Radioneurocirugia, Instituto Nacional de Neurologia y Neurocirugia, Insurgentes Sur 3877, Tlalpan, 14269, Mexico D. F. (Mexico)

Radiation transmission, leakage and beam penumbra are essential dosimetric parameters related to the commissioning of a multileaf collimation system. This work shows a comparative analysis of commonly used film detectors: X-OMAT V2 and EDR2 radiographic films, and GafChromic EBT registered radiochromic film. The results show that X-OMAT over-estimates radiation leakage and 80-20% beam penumbra. However, according to the reference values reported by the manufacturer for these dosimetric parameters, all three films are adequate for MLC dosimetric characterization, but special care must be taken when X-OMAT V2 film is used due to its low energy photon dependence.

• OSTI ID: 21149298
• Journal Information: AIP Conference Proceedings, Vol. 1032, Issue 1; Conference: 10. Mexican symposium on medical physics, Mexico City (Mexico), 17-19 Mar 2008; Other Information: DOI: 10.1063/1.2979309; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
BEAM OPTICS
BIOLOGICAL RADIATION EFFECTS
COLLIMATORS
COMMISSIONING
DOSIMETRY
FILM DOSIMETRY
FILMS
PHOTONS
RADIATION TRANSPORT
RADIOTHERAPY