Dosimetric Verification of the System of Planning Brainscan for Stereotactic Radiosurgery at Oncology Department of the General Hospital of Mexico
- SSDL, Departamento de Metrologia ININ, Salazar, Estado de Mexico 15245 (Mexico)
- Departamento de Radioterapia de la Unidad de Oncologia del Hospital General de Mexico, SS, Dr. Balmis 148, Mexico D.F. (Mexico)
The verification consists on the planning and administration of stereotactic treatments by means of conformed static beams, several polyethylene capsules with powder TLD 100 (type IAEA) located inside the head of a phantom Alderson-Rando. Because the planning system corrects for no-homogeneity in the density from the tomographic information, it is assumed that the absorbed dose in the tumor volume (capsule) corresponds to the dose absorbed to LiF: DLiF. Applying different cavity theories, the percent deviations to the nominal dose are: -1.81%{<=}{delta}%{<=}0.71%, which are consistent with the order of the U%'s. The values of DW are calculated from two calibration curve: TL Response (nC) vs DW for the energy of the 60Co corrected for energy dependence to the accelerator photon beam quality D20/D10=0.57. Once curve for 0.5 to 5 Gy and other for 5 to 35 Gy. The traceability for the Dwater is obtained by means of a secondary standard ionization chamber Farmer PTW 30013 calibrated at the NRC.
- OSTI ID:
- 20888208
- Journal Information:
- AIP Conference Proceedings, Vol. 854, Issue 1; Conference: 9. Mexican symposium on medical physics, Guadalajara, Jal. (Mexico), 18-21 Mar 2006; Other Information: DOI: 10.1063/1.2356393; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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