Mailed dosimetric audit of therapeutic proton beams using thermoluminescence MTS-N (LiF:Mg,Ti) powder – First results

Kunst, J.J.; Kopeć, Renata; Kukołowicz, Paweł; Mojżeszek, Natalia; Sadowski, Bartłomiej; Stolarczyk, Liliana; Ślusarczyk-Kacprzyk, Wioletta; Toboła, A.; Olko, P.

doi:10.1016/j.radmeas.2017.03.031

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…In Europe and the United States, TLDs have been used for postal audit of proton therapy [13,42], however, the postal audit protocol for proton beam has not been established in Japan. The RGD are used for postal audits of various irradiation methods such as IMRT for their excellent dose characteristics in photon therapy [10][11][12][13].…”

Section: Tablementioning

confidence: 99%

Dosimetric response of a glass dosimeter in proton beams: LET-dependence and correction factor

et al. 2021

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A radiophotoluminescent glass dosimeter (RGD) is widely used in postal audit system for photon beams in Japan. However, proton dosimetry in RGDs is scarcely used owing to a lack of clarity in their response to beam quality. In this study, we investigated RGD response to beam quality for establishing a suitable linear energy transfer (LET)-corrected dosimetry protocol in a therapeutic proton beam.The RGD response was compared with ionization chamber measurement for a 100-225 MeV passive proton beam. LET of the measurement points was calculated by the Monte Carlo method. An LET-correction factor, defined as a ratio between the non-corrected RGD dose and ionization chamber dose, of 1.226 × (LET) − 0.171 was derived for the RGD response. The magnitude of the LET-dependence of RGD increased with LET; for an LET of 8.2 keV/μm, the RGD under-response was up to 16%. The coefficient of determination, mean difference ± SD of non-corrected RGD dose, residual range-corrected RGD dose, and LET-corrected RGD dose to the ionization chamber are 0.923, 3.7 ± 4.2%, − 2.4 ± 7.5%, and 0.04 ± 2.1%, respectively. The LET-corrected RGD dose was within 5% of the corresponding ionization chamber dose at all energies until 200 MeV, where it was 5.3% lower than the ionization chamber dose.A corrected LET-dependence of RGD using a correction factor based on a power function of LET and precise dosimetric verification close to the maximum LET were realized here. We further confirmed establishment of an accurate postal audit under various irradiation conditions.

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Section: Tablementioning

confidence: 99%

Dosimetric response of a glass dosimeter in proton beams: LET-dependence and correction factor

et al. 2021

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“…The CCB proton therapy center is a cyclotron-based facility (IBA Proteus 235), featuring an active pencil-beam scanning as beam delivery technique. The operating energy supplied from the cyclotron ranges from 70 to 230 MeV: for more information about the commissioning of the proton scanning beam see [29,30].…”

Section: B Irradiation Parameters and Phantomsmentioning

confidence: 99%

Monitoring Proton Therapy Through in-Beam PET: An Experimental Phantom Study

Topi

Kraan

Krzempek

et al. 2020

IEEE Trans. Radiat. Plasma Med. Sci.

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In this work, we investigate the use of a PET system to monitor the proton therapy. The monitoring procedure is based on the comparison between the β+activity generated in the irradiated volume during the treatment, with the β+activity distribution obtained with Monte Carlo simulation. The dedicated PET system is a dual head detection system; each head is composed of nine scintillating LYSO crystal matrices read out independently with a custom modularized acquisition system. Our experimental data were acquired at the Cyclotron Centre Bronowice, Institute Nuclear Physics in Krakow, Poland and were simulated with the FLUKA Monte Carlo code. Homogeneous and heterogeneous plastic phantoms were irradiated with monoenergetic 130-MeV protons. The capabilities of our PET system to distinguish different irradiated materials were investigated, and the proton pencil beams were used as probes. Our focus was to analyze the activity width and the total activity event number in several cases. Irradiations were performed using either single pencil beams one at a time, or two pencil beams during the same data taking. The comparison of 1D activity profile for experimental data and MC simulation were always in good agreement showing that, the treatment quality assessment in proton therapy can be based on β+ activity measurements.

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Microdosimetric specific energy probability distribution in nanometric targets and its correlation with the efficiency of thermoluminescent detectors exposed to charged particles

Parisi

Hoey

Mégret

et al. 2019

Radiation Measurements

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Mailed dosimetric audit of therapeutic proton beams using thermoluminescence MTS-N (LiF:Mg,Ti) powder – First results

Cited by 3 publications

References 9 publications

Dosimetric response of a glass dosimeter in proton beams: LET-dependence and correction factor

Dosimetric response of a glass dosimeter in proton beams: LET-dependence and correction factor

Monitoring Proton Therapy Through in-Beam PET: An Experimental Phantom Study

Microdosimetric specific energy probability distribution in nanometric targets and its correlation with the efficiency of thermoluminescent detectors exposed to charged particles

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