A comparison of BCF-12 organic scintillators and Al2O3:C crystals for real-time medical dosimetry

Anders Ravnsborg Beierholm; Claus Erik Andersen; Lars Lindvold; Flemming Kjær-Kristoffersen; Joakim Medin

doi:10.1016/j.radmeas.2007.12.032

A comparison of BCF-12 organic scintillators and Al2O3:C crystals for real-time medical dosimetry

Anders Ravnsborg Beierholm, Claus Erik Andersen, Lars Lindvold, Flemming Kjær-Kristoffersen, Joakim Medin

Copenhagen University Hospital Herlev and Gentofte

Research output: Contribution to journal › Conference article › Research › peer-review

Abstract

Radioluminescence (RL) from aluminium oxide (Al2O3:C) crystals and organic scintillators such as the blue-emitting BCF-12 can be used for precise real-time dose rate measurements during radiation therapy of cancer patients. Attaching the dosimeters to thin light-guiding fiber cables enables in vivo use. The light signal is detected by a photomultiplier tube (PNIT). Unfortunately Cerenkov light and fluorescence are also generated in the fiber cable itself during irradiation, and this so-called stem effect can be significant compared with the dosimeter signal. In the case of Al2O3:C, this problem can be circumvented for pulsed beams due to the long life-time of the main luminescence center. In contrast, chromatic removal seems to be the most effective method for organic scintillators, but is found to yield some experimental complexities. In this paper, we report on dose rate measurements using BCF-12 as well as Al2O3:C. We focus our attention on comparing the efficiency of stem effect removal of the two materials, as well as the accuracy of the resulting depth-dose curves. (c) 2007 Elsevier Ltd. All rights reserved.

Original language	English
Journal	Radiation Measurements
Volume	43
Issue number	2-6
Pages (from-to)	898-903
ISSN	1350-4487
DOIs	https://doi.org/10.1016/j.radmeas.2007.12.032
Publication status	Published - 2008
Event	15th International Conference on Solid State Dosimetry - Delft, Netherlands Duration: 8 Jul 2007 → 13 Jul 2007 Conference number: 15

Conference

Conference	15th International Conference on Solid State Dosimetry
Number	15
Country/Territory	Netherlands
City	Delft
Period	08/07/2007 → 13/07/2007

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title = "A comparison of BCF-12 organic scintillators and Al2O3:C crystals for real-time medical dosimetry",

abstract = "Radioluminescence (RL) from aluminium oxide (Al2O3:C) crystals and organic scintillators such as the blue-emitting BCF-12 can be used for precise real-time dose rate measurements during radiation therapy of cancer patients. Attaching the dosimeters to thin light-guiding fiber cables enables in vivo use. The light signal is detected by a photomultiplier tube (PNIT). Unfortunately Cerenkov light and fluorescence are also generated in the fiber cable itself during irradiation, and this so-called stem effect can be significant compared with the dosimeter signal. In the case of Al2O3:C, this problem can be circumvented for pulsed beams due to the long life-time of the main luminescence center. In contrast, chromatic removal seems to be the most effective method for organic scintillators, but is found to yield some experimental complexities. In this paper, we report on dose rate measurements using BCF-12 as well as Al2O3:C. We focus our attention on comparing the efficiency of stem effect removal of the two materials, as well as the accuracy of the resulting depth-dose curves. (c) 2007 Elsevier Ltd. All rights reserved.",

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AU - Beierholm, Anders Ravnsborg

AU - Andersen, Claus Erik

AU - Lindvold, Lars

AU - Kjær-Kristoffersen, Flemming

AU - Medin, Joakim

N1 - Conference code: 15

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N2 - Radioluminescence (RL) from aluminium oxide (Al2O3:C) crystals and organic scintillators such as the blue-emitting BCF-12 can be used for precise real-time dose rate measurements during radiation therapy of cancer patients. Attaching the dosimeters to thin light-guiding fiber cables enables in vivo use. The light signal is detected by a photomultiplier tube (PNIT). Unfortunately Cerenkov light and fluorescence are also generated in the fiber cable itself during irradiation, and this so-called stem effect can be significant compared with the dosimeter signal. In the case of Al2O3:C, this problem can be circumvented for pulsed beams due to the long life-time of the main luminescence center. In contrast, chromatic removal seems to be the most effective method for organic scintillators, but is found to yield some experimental complexities. In this paper, we report on dose rate measurements using BCF-12 as well as Al2O3:C. We focus our attention on comparing the efficiency of stem effect removal of the two materials, as well as the accuracy of the resulting depth-dose curves. (c) 2007 Elsevier Ltd. All rights reserved.

AB - Radioluminescence (RL) from aluminium oxide (Al2O3:C) crystals and organic scintillators such as the blue-emitting BCF-12 can be used for precise real-time dose rate measurements during radiation therapy of cancer patients. Attaching the dosimeters to thin light-guiding fiber cables enables in vivo use. The light signal is detected by a photomultiplier tube (PNIT). Unfortunately Cerenkov light and fluorescence are also generated in the fiber cable itself during irradiation, and this so-called stem effect can be significant compared with the dosimeter signal. In the case of Al2O3:C, this problem can be circumvented for pulsed beams due to the long life-time of the main luminescence center. In contrast, chromatic removal seems to be the most effective method for organic scintillators, but is found to yield some experimental complexities. In this paper, we report on dose rate measurements using BCF-12 as well as Al2O3:C. We focus our attention on comparing the efficiency of stem effect removal of the two materials, as well as the accuracy of the resulting depth-dose curves. (c) 2007 Elsevier Ltd. All rights reserved.

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U2 - 10.1016/j.radmeas.2007.12.032

DO - 10.1016/j.radmeas.2007.12.032

M3 - Conference article

SN - 1350-4487

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EP - 903

JO - Radiation Measurements

JF - Radiation Measurements

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T2 - 15th International Conference on Solid State Dosimetry

Y2 - 8 July 2007 through 13 July 2007

ER -

A comparison of BCF-12 organic scintillators and Al2O3:C crystals for real-time medical dosimetry

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