Characterization, calibration and application in radiotherapy of a dosimetric system based on detectors AT2OR3: C

Authors

  • José Fernando Márquez Pachas Facultad de Ciencias Físicas, Universidad Nacional de San Marcos, Lima Cercado, Lima, Peru
  • Carmen Sandra Guzman Calcina Facultad de Medicina Humana, Universidad Ricardo Palma, Lima, Perú.
  • Jesus Aymar Alejos Laboratorio de Dosimetría, Control Nuclear SAC, San Isidro, Lima, Perú
  • Eduardo Carrasco Solis Departamento de Radioterapia, Instituto Nacional de Enfermedades Neoplásicas, Surquillo, Lima, Perú.
  • Carlos Herrera Castillo Departamento de Radioterapia, Instituto Nacional de Enfermedades Neoplásicas, Surquillo, Lima, Perú.
  • Galo Patino Camargo Facultad de Ciencias Físicas, Universidad Nacional de San Marcos, Lima Cercado, Lima, Perú.
  • Javier Solano Salinas Facultad de Ciencias, Universidad Nacional de Ingeniería, Rímac, Lima, Perú
  • Juan Abraham Méndez Velásquez Facultad de Ciencias Naturales y Matemática, Universidad Nacional del Callao, Callao, Perú
  • Rolando Juan Alva Zavaleta Facultad de Ciencias Naturales y Matemática, Universidad Nacional del Callao, Callao, Perú
  • Jessenia Brillit Villaverde Herrera Instituto de Fisica de Sao Carlos, Univerdade de Sao Paulo - USP, Sao Paulo, SP, Brasil

DOI:

https://doi.org/10.21754/tecnia.v32i1.1286

Keywords:

Dosimeter, Radiation therapy, Nanodot

Abstract

In radiotherapy, it is essential to have an alternative dosimetric system to identify possible errors at some stage of the process. The optically stimulated luminescence (OSL) technology represents a great advance in the detection of radiation in different areas, one of them being in the area of clinical dosimetry. Objective: To implement an alternative dosimetric system, based on OSL technology of carbon-doped aluminum oxide crystals.  Material and methods: Al2or3:C detectors called "nanodot", MicroStar reader, ionization chambers (Standard Imaging and PTW Freiburg), electrometers (PTW-Freiburg and MNCNP) and other accessories.  Results: The dosimetric - algorithmic procedure, developed for the calculation of the adsorbed dose in the tumor volume, reproduces the dose values with uncertainties less than 2% for a confidence level of 95% and with relative differences less than 5% compared to the values of the absorbed doses prescribed and / or foreseen in radiotherapy treatments.  Conclusions: The nanodot detectors  represent a viable alternative for the verification of the absorbed dose in the patient during radiotherapeutic practice for the verification of the prescribed dose and imparted by in vivo dosimetry. Its quality to preserve the information, as a physical witness of the procedure, contributes to security in the treatments.

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References

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Published

2022-06-30

How to Cite

[1]
J. F. Márquez Pachas, “Characterization, calibration and application in radiotherapy of a dosimetric system based on detectors AT2OR3: C”, TEC, vol. 32, no. 1, pp. 37–43, Jun. 2022.

Issue

Vol. 32 No. 1 (2022)

Section

Medical physics

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