Small Radiation Beam Dosimetry for Radiosurgery of Trigeminal Neuralgia: One Case Analysis

Journal Article · Mon Aug 11 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2979277· OSTI ID:21149278

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

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1. Laboratorio de Fisica Medica, Instituto Nacional de Neurologia y Neurocirugia. Insurgentes Sur 3677, Col. La Fama, C. P. 14269, Tlalpan, Mexico, D. F. (Mexico)
2. Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, C. P. 04510, Mexico, D. F., Mexico (Mexico)
3. Unidad de Radioneurocirugia, Instituto Nacional de Neurologia y Neurocirugia. Insurgentes Sur 3677, Col. La Fama, C. P. 14269, Tlalpan, Mexico, D. F. (Mexico)

The use of small radiation beams for trigeminal neuralgia (TN) treatment requires high precision and accuracy in dose distribution calculations and delivery. Special attention must be kept on the type of detector to be used. In this work, the use of GafChromic EBT registered radiochromic and X-OMAT V2 radiographic films for small radiation beam characterization is reported. The dosimetric information provided by the films (total output factors, tissue maximum ratios and off axis ratios) is compared against measurements with a shielded solid state (diode) reference detector. The film dosimetry was used for dose distribution calculations for the treatment of trigeminal neuralgia radiosurgery. Comparison of the isodose curves shows that the dosimetry produced with the X-OMAT radiographic film overestimates the dose distributions in the penumbra region.

• OSTI ID: 21149278
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1032; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
ACCURACY
BIOLOGICAL RADIATION EFFECTS
COMPARATIVE EVALUATIONS
FILM DOSIMETRY
IRRADIATION
ISODOSE CURVES
RADIATION DETECTION
RADIATION DOSE DISTRIBUTIONS
RADIOTHERAPY
SEMICONDUCTOR DETECTORS
SURGERY