In vivo dosimetry in total body irradiation

Main Article Content

E Llanes Veiga
R Alfonso Laguardia
R Caballero Pinelo

Abstract

Total Body Irradiation (TBI) is a radiotherapy technique that consists of irradiating homogeneously the whole patient’s body and it is characterized by an extended source to surface distances and the use of large irradiation fields. The limitations of the available input data and inherent problems with the calculation procedures make it very difficult to accurately determine the dose distributions in TBI. For these reasons, it is highly recommended to use In Vivo Dosimetry (IVD), to guarantee the quality of TBI treatments as a direct measurement of the delivered dose. An IVD QA system was implemented based on semiconductor diodes and radiochromic films. For the commissioning of the system, both detector types were calibrated independently, using as reference an ionization chamber with a valid certificate in terms of absorbed dose to water (Dw). This guarantees the traceability of the measurements. An experiment was carried out to simulate a clinical TBI procedure to a phantom. In this way, the calibration of the dosimetry system was confirmed.

Article Details

How to Cite
Llanes Veiga, E., Alfonso Laguardia, R., & Caballero Pinelo, R. (2019). In vivo dosimetry in total body irradiation. Nucleus, (65), 51-55. Retrieved from http://nucleus.cubaenergia.cu/index.php/nucleus/article/view/680
Section
Ciencias Nucleares

References

[1] BELTRÁN D. Irradiacion corporal total (TBI). Murcia: Fundación Grupo IMO, 2015.
[2] American Association of Physicists in Medicine by Medical Physics. Diode in vivo dosimetry for patients receiving external beam radiation therapy. AAPM Report No. 087. Report of Task Group 62 of the Radiation Therapy Committee. American Association of Physicists in Medicine by Medical Physics, 2005.
[3] American Association of Physicists in Medicine by Medical Physics. Diode in vivo dosimetry for patients receiving external beam radiation therapy. AAPM Report No. 087. Report of Task Group 62 of the Radiation Therapy Committee. American Association of Physicists in Medicine by Medical Physics, 2005.
[4] RIBAS M, JORNET N, EUDALDO T, CARRASCO P. Aspectos generales de la dosimetría in vivo con diodos. Servei de Radiofisica I Radioproteccio, Hospital Santa Creu I Sant Pau. Barcelona, Spain, 2010.
[5] PTW. Manual de usuario MULTIDOS T10004. 2011.
[6] MOYLAN R, TRENT A, KAIRN T. Dosimetric accuracy of Gafchromic EBT2 and EBT3 film for in vivo dosimetry. Phys Eng Sci Med. 2013; (36): 331-337
[7] VAN DAN J, MARINELLO G. Methods for in vivo dosimetry in external radiotherapy. Brussels: ESTRO, 2006.
[8] PTW. Manual de usuario VivoSoft a partir de la versión 3.0.1. 2010.