Review of technologies and procedures of clinical dosimetry for scanned ion beam radiotherapy

Giordanengo, S.; Manganaro, L.; Vignati, A.

doi:10.1016/j.ejmp.2017.10.013

Cited by 35 publications

(41 citation statements)

References 205 publications

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“…The measurements described in Section 2 are the basis for precise and accurate charged‐particle dosimetry but additional dosimetric information is needed for realistic patient‐specific scenarios and the different dose delivery configurations, above all for the advanced pencil beam scanning technique. Actually, pre‐clinical pencil beam characterization (acceptance and commissioning) and QA procedures require various relative dose measurements as summarized in a recent review on technologies and procedures of clinical dosimetry for scanned ion beam radiotherapy . Commissioning and QA is not only necessary for the beam parameters but also for the equipment itself and an overview of a comprehensive implementation addressing the specific demands of scanned beams is given by Grevillot et al …”

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

“…Segmented ICs are also adequate for planar dose checks but for the low spatial resolution (5–10 mm) these dosimeters are not recommended for commissioning and TPS validation while are a good choice for QA tests …”

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

“…Currently, as mentioned in a recent review, a number of commercial plane‐parallel IC are used like the Pin‐Point and the advanced Markus (PTW), or the PPC05 (IBA Dosimetry) models. Among the large‐area IC, the Bragg peak chamber (PTW) is the current clinical standard for the longitudinal profiles of individual pencil beam characterization.…”

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

“…Actually, pre-clinical pencil beam characterization (acceptance and commissioning) and QA procedures require various relative dose measurements as summarized in a recent review on technologies and procedures of clinical dosimetry for scanned ion beam radiotherapy. 88 Commissioning and QA is not only necessary for the beam parameters but also for the equipment itself and an overview of a comprehensive implementation addressing the specific demands of scanned beams is given by Grevillot et al 89 Specific detectors for dose, relative dose or surrogates of dose (such as ionization) have been developed for easy and fast verification of 3D delivered dose distributions. To reduce the acquisition time, measurements can be performed in air or in tissue-equivalent phantoms rather than in water phantoms.…”

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

“…Segmented ICs 99-101 are also adequate for planar dose checks but for the low spatial resolution (5-10 mm) these dosimeters are not recommended for commissioning and TPS validation while are a good choice for QA tests. 88 Alternative detectors based on diode [102][103][104][105] or diamond arrays [106][107][108] are under development since many years to replace film. Their main advantages are the good spatial and dose (large signal) resolution.…”

Section: A1 1d and 2d Transversal Dose Profilesmentioning

confidence: 99%

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Dose detectors, sensors, and their applications

Giordanengo

2018

Medical Physics

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This article is intended to present the different types of particle and radiation detectors available for applications in particle therapy. Several types of detectors and sensors exist for measurements of absorbed dose in reference and nonreference conditions and the ones in use for beam monitoring. Therefore, this manuscript focuses on the following applications: (a) primary methods for dosimetry in ion beams, (b) measurements of absorbed dose in realistic patient‐specific scenarios with different dose delivery configurations, and (c) beam monitoring. Water and graphite calorimeters, Faraday cups, ionization based gas detectors are described first, followed by the description of the protocols for proton and ion dosimetry. Then films, scintillator and solid‐state detectors are reviewed. Finally, several types of ionization chambers (large, pinpoint, arrays of chambers arranged in regular 1D or 2D pattern, parallel‐plate configuration with large integral electrodes or with anode segmented in strips or pixels, multi‐wire, and the multi‐gap prototype) have been considered. New beam monitors to deal with a wide range of intensity and pulsed beams expected from new accelerators, different dose fractionation and advanced delivery techniques are presented. The existing detectors available for particle therapy have been described taking into account the different requirements for devices used in reference and nonreference conditions and the ones designed for beam monitoring.

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Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

Section: Detectors For Absorbed Dose In Nonreference Conditionsmentioning

confidence: 99%

Section: A1 1d and 2d Transversal Dose Profilesmentioning

confidence: 99%

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Dose detectors, sensors, and their applications

Giordanengo

2018

Medical Physics

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Evaluation of the IAEA‐TRS 483 protocol for the dosimetry of small fields (square and stereotactic cones) using multiple detectors

Smith

Montesari

Oliver³

et al. 2019

J Applied Clin Med Phys

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The IAEA TRS 483 protocol1 for the dosimetry of small static fields in radiotherapy was used to calculate output factors for the Elekta Synergy linac at the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA). Small field output factors for both square and circular fields were measured using nine different detectors. The “corrected” output factors (ratio of detector readings multiplied by the appropriate correction factor from the protocol) showed better consistency compared to the “uncorrected” output factors (ratio of detector readings only), with the relative standard deviation decreasing by approximately 1% after the application of the relevant correction factors. Comparisons relative to an arbitrarily chosen PTW 60019 microDiamond detector showed a reduction of maximal variation for the corrected values of approximately 3%. A full uncertainty budget was prepared to analyze the consistency of the output factors. Agreement within uncertainties between all detectors and field sizes was found, except for the 15 mm circular field. The results of this study show that the application of IAEA TRS 4831 when measuring small fields will improve the consistency of small field measurements when using multiple detectors contained within the protocol.

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Implementation of Sphinx/Lynx as daily QA equipment for scanned proton and carbon ion beams

Grevillot

Moreno

Fuchs

et al. 2023

J Applied Clin Med Phys

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Purpose Reporting on the first implementation of a proton dedicated commercial device (IBA Sphinx/Lynx) for daily Quality Assurance (QA) of scanned proton and carbon ion beams. Methods Daily QA trendlines over more than 3 years for protons and more than 2 years for carbon ions have been acquired. Key daily QA parameters were reviewed, namely the spot size and position, beam range, Bragg peak width, coincidence (between beam and imaging system isocenters), homogeneity and dose. Results The performance of the QA equipment for protons and carbon ions was evaluated. Daily QA trendlines allowed us to detect machine performance drifts and changes. The definition of tolerances and action levels is provided and compared with levels used in the literature. Conclusion The device has been successfully implemented for routine daily QA activities in a dual particle therapy facility for more than 2 years. It improved the efficiency of daily QA and provides a comprehensive QA process.

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Review of technologies and procedures of clinical dosimetry for scanned ion beam radiotherapy

Cited by 35 publications

References 205 publications

Dose detectors, sensors, and their applications

Dose detectors, sensors, and their applications

Evaluation of the IAEA‐TRS 483 protocol for the dosimetry of small fields (square and stereotactic cones) using multiple detectors

Implementation of Sphinx/Lynx as daily QA equipment for scanned proton and carbon ion beams

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