Analysis of the absorption spectra of EBT2 and EBT3 radiochromic films

  • E Y León Marroquín Laboratorio de Fotomedicina Biofotónica Láser de Pulsos Ultracortos, Facultad de Medicina, Universidad Autónoma del Estado de México. Laboratorio de Física Médica y Unidad de Radiocirugía, Instituto Nacional de Neurología y Neurocirugía
  • A M Camacho López Laboratorio de Fotomedicina Biofotónica Láser de Pulsos Ultracortos, Facultad de Medicina, Universidad Autónoma del Estado de México,
  • A O García Garduño Laboratorio de Física Médica y Unidad de Radiocirugía, Instituto Nacional de Neurología y Neurocirugía
  • A J Herrera González Laboratorio de Física Médica y Unidad de Radiocirugía, Instituto Nacional de Neurología y Neurocirugía
  • E J Villarreal Barajas Department of Oncology and Department of Physics and Astronomy, University of Calgary, Calgary AB, and Department of Medical Physics, Tom Baker Cancer Center, Alberta, Canada
  • A C Martínez Quiroz Laboratorio de Fotomedicina Biofotónica Láser de Pulsos Ultracortos, Facultad de Medicina, Universidad Autónoma del Estado de México
  • D De la Cruz Pérez Laboratorio de Fotomedicina Biofotónica Láser de Pulsos Ultracortos, Facultad de Medicina, Universidad Autónoma del Estado de México
  • G Jiménez Avilés Laboratorio de Fotomedicina Biofotónica Láser de Pulsos Ultracortos, Facultad de Medicina, Universidad Autónoma del Estado de México
Keywords: Absorption spectrum, spectrophotometer, radiochromic film

Abstract

To analyze the net absorption spectra of EBT2 and EBT3 radiochromic films to describe their influenceon the behavior of dose-response curves. The films were irradiated in a linear accelerator of 6 MV. The net absorption spectra were obtained with a UV / VIS spectrophotometer. Dose-response curves were obtained with a scanner, a He-Ne laser and a spectrophotometer. The absorption spectrum of the EBT2 shows three focused absorption bands that retain position and increase their intensity as a function of dose, however, this behavior is not observed in EBT3 films. The dose-response curve shows maximum sensitivity using the spectrophotometer, but does not show a defined behavior. Generation of new knowledge for the creation of new optical systems capable of amplifying the responsiveness of the films. Show the correlation between net absorption spectra and their influence on dose-response curves in three different optical systems. The behavior of absorption spectra combined with the behavior of the dose-response curves helps to discard the use of optical systems that do not guarantee a reliable clinical use.

Published
2017-01-15
How to Cite
León Marroquín, E. Y., Camacho López, A. M., García Garduño, A. O., Herrera González, A. J., Villarreal Barajas, E. J., Martínez Quiroz, A. C., De la Cruz Pérez, D., & Jiménez Avilés, G. (2017). Analysis of the absorption spectra of EBT2 and EBT3 radiochromic films. Mexican Journal of Biomedical Engineering, 38(1), 363-371. Retrieved from https://rmib.com.mx/index.php/rmib/article/view/40
Section
Special Issue