Dose-response characterization of a prototype aluminium oxide detector for megavoltage photon dosimetry


Author(s): Hadi Nasrollahi*, Mohsen Hasani, Hasan Ali Nedaei, Hamideh Naderi and Hossein Arabi

Background: Aluminium oxide (Al2O3:C), a material with Radio Luminescence (RL) property, is extensively used for dosimetry of ionizing radiations due to its high sensitivity, small size, and low fading properties. The present study aims to investigate the response rate of a prototype aluminium oxide (Al2O3) detector, previously introduced, for megavoltage photon beam dosimetry, and also to determine its dosimetric characteristics. Materials and methods: A piece of the prototype Al2O3 crystal was cut into smaller fragments (0.2 cm3 × 0.2 cm3 × 0.1 cm3). Then, the calibration curve of the dosimeters was obtained through investigating its luminescence feature while exposed to 6 mV, 10 mV, and 18 mV photon beams using an Elekta linear accelerator (linac). The dependence of the dosimeter response on the energy of the radiation beam, dependence of the dosimeter response to the dose alteration, and its repeatability were also investigated. Results: For the megavoltage photon energies, the prototype Al2O3 crystal exhibited dosimetric responses independent of the dose changes and energy of the radiation beam (photons). This dosimeter showed a linear calibration curve with three peaks at 308, 375, and 595 nm, as well as acceptable repeatability in the measurement of radiation doses ranging from 20 cGy to 200 cGy. Conclusion: The prototype Al2O3 crystal exhibited reproducible and reliable dosimetric properties which can be exploited for the dosimetry megavoltage photon beams in radiotherapy clinical settings.

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Awards Nomination

Editors List

  • Prof. Elhadi Miskeen

    Obstetrics and Gynaecology Faculty of Medicine, University of Bisha, Saudi Arabia

  • Ahmed Hussien Alshewered

    University of Basrah College of Medicine, Iraq

  • Sudhakar Tummala

    Department of Electronics and Communication Engineering SRM University – AP, Andhra Pradesh




  • Alphonse Laya

    Supervisor of Biochemistry Lab and PhD. students of Faculty of Science, Department of Chemistry and Department of Chemis


  • Fava Maria Giovanna


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