Intracavitary in vivo dosimetry based on multichannel fiber-coupled Radioluminescence and Optically Stimulated Luminescence of Al&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;3&lt;/inf&gt;:C

Spasic, E.; Magne, Sylvain; Aubineau-Lanièce, I.; Carlan, L. de; Malet, C.; Ginestet, C.; Ferdinand, Pierre

doi:10.1109/animma.2011.6172964

Cited by 3 publications

(4 citation statements)

References 15 publications

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“…For the sake of demonstration, only one sensor was used but this measurement protocol may be extended to a plurality of sensors (e.g. a dosimetric catheter including a chain of Al2O3:C crystals for intracavitary IVD [20]), connected to a multichannel RL-OSL/FO reader.…”

Section: Discussionmentioning

confidence: 99%

Fiber-Coupled, Time-Gated <formula formulatype="inline"> <tex Notation="TeX">${\hbox {Al}}_{2}{\hbox {O}}_{3}\!:\!{\hbox {C}}$</tex> </formula> Radioluminescence Dosimetry Technique and Algorithm for Radiation Therapy With LINACs

Magne

Deloule

Ostrowsky

et al. 2013

IEEE Trans. Nucl. Sci.

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An original algorithm for real-time In Vivo Dosimetry (IVD) based on Radioluminescence (RL) of dosimetricgrade Al2O3:C crystals is described and demonstrated in reference conditions with 12-MV photon beams from a Saturne 43 linear accelerator (LINAC), simulating External Beam Radiation Therapy (EBRT) treatments. During the course of irradiation, a portion of electrons is trapped within the Al2O3:C crystal while another portion recombines and generates RL, recorded on-line using an optical fiber. The RL sensitivity is dosedependent and increases in accordance with the concentration of trapped electrons. Once irradiation is completed, the Al2O3:C crystal is reset by laser light (reusable) and the resultant OSL (Optically Stimulated Luminescence) is also collected back by the remote RL-OSL reader and finally integrated to yield the absorbed dose. During irradiation, scintillation and Cerenkov lights generated within the optical fiber ("stem effect") are removed by a time-discrimination method involving a discriminating unit and a fiber-coupled BGO scintillator placed in the irradiation room, next to the LINAC. The RL signals were then calibrated with respect to reference dose and dose rate data using an ionization chamber (IC). The algorithm relies upon the integral of the RL and provides the accumulated dose (useful to the medical physicist) at any time during irradiation, the dose rate being derived afterwards. It is tested with both step and arbitrary dose rate profiles, manually operated from the LINAC control desk. The doses measured by RL and OSL are both compared to reference doses and deviations are about ± 2 % and ± 1 % respectively, thus demonstrating the reliability of the algorithm for arbitrary profiles and wide range of dose rates. Although the calculation was done off-line, it is amenable to realtime processing during irradiation.

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Section: Discussionmentioning

confidence: 99%

Fiber-Coupled, Time-Gated <formula formulatype="inline"> <tex Notation="TeX">${\hbox {Al}}_{2}{\hbox {O}}_{3}\!:\!{\hbox {C}}$</tex> </formula> Radioluminescence Dosimetry Technique and Algorithm for Radiation Therapy With LINACs

Magne

Deloule

Ostrowsky

et al. 2013

IEEE Trans. Nucl. Sci.

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“…The second generation (OSL2) relies on alumina crystals. We have shown that the dose resolution is well < 50 µGy [13], enabling for instance, an average dose rate measurement as low as 50 µGy/h with 1 h integration [12]. The OSL2 system is a CW multichannel unit (16 outputs) built in a 19" enclosure including a diode-pumped solid-state laser (532 nm), and a 16-channel fibre switch.…”

Section: Dosimetry Based On Fiber Remote Optically Stimulated Lumines...mentioning

confidence: 99%

“…The OSL2 system is a CW multichannel unit (16 outputs) built in a 19" enclosure including a diode-pumped solid-state laser (532 nm), and a 16-channel fibre switch. It is linked by USB to a laptop running with a dedicated LabView  software [13]. It includes PMMA fibers and tiny alumina crystals (0.3 x 0.3 x 1 mm 3 ) inserted into fiber tips.…”

Section: Dosimetry Based On Fiber Remote Optically Stimulated Lumines...mentioning

confidence: 99%

Optical fiber sensors to improve the safety of nuclear power plants

Ferdinand

Magne

Laffont

2013

Fourth Asia Pacific Optical Sensors Conference

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Safety must always prevail in Nuclear Power Plants (NPPs), as shown at Fukushima-Daiichi, in March 2011. So, innovations are clearly needed to strengthen instrumentations, which went inoperative during this nuclear accident as a consequence of power supply losses. Possible improvements concern materials and structures, which may be remotely monitored thanks to Optical Fiber Sensors (OFS). We detail topics involving OFS helpful for monitoring, in nominal conditions as well as during a severe accident. They include distributed sensing (Rayleigh, Raman, Brillouin) for both temperature and structure monitoring as well as H 2 concentration and ionizing radiation monitoring. For future plants, Fiber Bragg Grating (FBG) sensors are considered up to high temperature for sodium-cooled fast reactor monitoring. These applications can benefit from fiber advantages: sensor multiplexing, multi-km range, no risk-to-people, no common failure mode with other technologies, remote sensing, and the ability to operate in case of power supply loss in the NPP.

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“…The fiber collects the light emitted by the scintillator during irradiation (radioluminescence, RL) and a light detector placed at the other extreme of the optical fiber measures its intensity. In other words, FOD technique allows for in-vivo and real-time dose assessment, and since its small size not only permits accurate measurements in regions of high dose gradients but intracavitary measurements can also be performed (Spasic et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Response characterization of an Y2O3:Eu-based radioluminescence probe under 60Co irradiation

Molina

Sommer

Kattner

et al. 2013

Radiation Measurements

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Intracavitary in vivo dosimetry based on multichannel fiber-coupled Radioluminescence and Optically Stimulated Luminescence of Al<inf>2</inf>O<inf>3</inf>:C

Cited by 3 publications

References 15 publications

Fiber-Coupled, Time-Gated <formula formulatype="inline"> <tex Notation="TeX">${\hbox {Al}}_{2}{\hbox {O}}_{3}\!:\!{\hbox {C}}$</tex> </formula> Radioluminescence Dosimetry Technique and Algorithm for Radiation Therapy With LINACs

Fiber-Coupled, Time-Gated <formula formulatype="inline"> <tex Notation="TeX">${\hbox {Al}}_{2}{\hbox {O}}_{3}\!:\!{\hbox {C}}$</tex> </formula> Radioluminescence Dosimetry Technique and Algorithm for Radiation Therapy With LINACs

Optical fiber sensors to improve the safety of nuclear power plants

Response characterization of an Y2O3:Eu-based radioluminescence probe under 60Co irradiation

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