Estimation of the response function of a PADC based neutron dosimeter in terms of fluence and Hp(10)

Domingo, C.; de-San-Pedro, M.; García-Fusté, M.J.; Romero, Marta; Amgarou, K.; Fernández, F.

doi:10.1016/j.radmeas.2012.02.016

Cited by 12 publications

(3 citation statements)

References 6 publications

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“…Type I track detectors (type HARZLAS TD-1, Nagase Landauer Ltd., Japan) use the relationship between the parameters of etched tracks and LET ( 46 ). Type II track detectors (Intercast Europe S.R.L., Parma, Italy) include a set of converters (polyethylene, Makrofol, and nylon) specifically designed to make the detector sensitive to neutrons from thermal to high energy range ( 47 , 48 ). A weighted average of the fluence response factor can be evaluated from the specific response factor and the fraction of neutrons arriving to the point in each energy range (thermal, epithermal, evaporation, and high energy) ( 39 ).…”

Section: Methodsmentioning

confidence: 99%

Out-of-Field Doses Produced by a Proton Scanning Beam Inside Pediatric Anthropomorphic Phantoms and Their Comparison With Different Photon Modalities

Knežević

Stolarczyk²,

Ambrožová³

et al. 2022

Front. Oncol.

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Since 2010, EURADOS Working Group 9 (Radiation Dosimetry in Radiotherapy) has been involved in the investigation of secondary and scattered radiation doses in X-ray and proton therapy, especially in the case of pediatric patients. The main goal of this paper is to analyze and compare out-of-field neutron and non-neutron organ doses inside 5- and 10-year-old pediatric anthropomorphic phantoms for the treatment of a 5-cm-diameter brain tumor. Proton irradiations were carried out at the Cyclotron Centre Bronowice in IFJ PAN Krakow Poland using a pencil beam scanning technique (PBS) at a gantry with a dedicated scanning nozzle (IBA Proton Therapy System, Proteus 235). Thermoluminescent and radiophotoluminescent dosimeters were used for non-neutron dose measurements while secondary neutrons were measured with track-etched detectors. Out-of-field doses measured using intensity-modulated proton therapy (IMPT) were compared with previous measurements performed within a WG9 for three different photon radiotherapy techniques: 1) intensity-modulated radiation therapy (IMRT), 2) three-dimensional conformal radiation therapy (3D CDRT) performed on a Varian Clinac 2300 linear accelerator (LINAC) in the Centre of Oncology, Krakow, Poland, and 3) Gamma Knife surgery performed on the Leksell Gamma Knife (GK) at the University Hospital Centre Zagreb, Croatia. Phantoms and detectors used in experiments as well as the target location were the same for both photon and proton modalities. The total organ dose equivalent expressed as the sum of neutron and non-neutron components in IMPT was found to be significantly lower (two to three orders of magnitude) in comparison with the different photon radiotherapy techniques for the same delivered tumor dose. For IMPT, neutron doses are lower than non-neutron doses close to the target but become larger than non-neutron doses further away from the target. Results of WG9 studies have provided out-of-field dose levels required for an extensive set of radiotherapy techniques, including proton therapy, and involving a complete description of organ doses of pediatric patients. Such studies are needed for validating mathematical models and Monte Carlo simulation tools for out-of-field dosimetry which is essential for dedicated epidemiological studies which evaluate the risk of second cancers and other late effects for pediatric patients treated with radiotherapy.

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Section: Methodsmentioning

confidence: 99%

Out-of-Field Doses Produced by a Proton Scanning Beam Inside Pediatric Anthropomorphic Phantoms and Their Comparison With Different Photon Modalities

Knežević

Stolarczyk²,

Ambrožová³

et al. 2022

Front. Oncol.

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“…Universitat Autònoma de Barcelona (UAB) has developed a dosimeter based on PADC track-etched detectors (García et al 2005, Domingo et al 2013 with a layered structure described in detail by Domingo et al (2013) and García et al (2005). These detectors were previously used in EURADOS WG9 experiments and the procedure for reading the dose, based on MC simulation, was presented by Stolarczyk et al (2018) and García-Fusté et al (2020).…”

Section: Track-etched and Bd Used For Out-of-field Neutron Dosimetrymentioning

confidence: 99%

“…The neutron dose equivalent H was computed according to the Kerma Approximation (therefore using the neutron fluence-to-kerma conversion coefficients k Φ (E) in ICRU 4-component tissue substitute (Chadwick et al 1999) and using the neutron quality factors Q(E) (Siebert and Schuhmacher 1995)). From the experimental net track density per Gy, C PADC , the response function of the whole dosimeter in terms of fluence R Φ (E) (Domingo et al 2013) and the MC unit spectral neutron fluence, φ E (E). Based on that quantities, neutron dose equivalent, H, and neutron fluence, Φ PADC , can be evaluated.…”

Section: Track-etched and Bd Used For Out-of-field Neutron Dosimetrymentioning

confidence: 99%

Out-of-field doses for scanning proton radiotherapy of shallowly located paediatric tumours—a comparison of range shifter and 3D printed compensator

et al. 2021

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Calculating the ambient dose equivalent of fast neutrons using elemental composition of human body

Saeed

Nafee

Shaheen

et al. 2016

Applied Mathematics and Computation

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Estimation of the response function of a PADC based neutron dosimeter in terms of fluence and Hp(10)

Cited by 12 publications

References 6 publications

Out-of-Field Doses Produced by a Proton Scanning Beam Inside Pediatric Anthropomorphic Phantoms and Their Comparison With Different Photon Modalities

Out-of-Field Doses Produced by a Proton Scanning Beam Inside Pediatric Anthropomorphic Phantoms and Their Comparison With Different Photon Modalities

Out-of-field doses for scanning proton radiotherapy of shallowly located paediatric tumours—a comparison of range shifter and 3D printed compensator

Calculating the ambient dose equivalent of fast neutrons using elemental composition of human body

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