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Ta B, Hutschemaekers S, Crijns A, Pisciotta P, Canters R, Vilches Freixas G, Cambraia Lopes P, Niezink A. OC-0294 Proton therapy in mediastinal lymphoma patients in a nationwide cohort, using model-based selection. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02552-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vilches Freixas G, Vaniqui A, Vaassen F, Hazelaar C, Öllers M, Canisius S, Tissen D, Van Enckevort E, Rousch E, Verhoeven K, Van Loon J, De Ruysscher D, Bosmans G, Van Elmpt W, Rinaldi I, Peeters S. PO-1614: Breath hold characteristics and intra-fraction motion during nasal high flow therapy assisted RT. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01632-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fonseca G, Almeida I, Wagenberg T, Wolfs C, Freixas GV, Rinaldi I, Martens J, Bosmans G, Verhaegen F. PH-0240: An independent platform for dose calculation and log file evaluation in proton therapy. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)00264-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Freixas GV, Unipan M, Rinaldi I, Martens J, Ares C, Bosmans G. PO-0942 Optimization of adaptive aperture margins in robustly optimized pencil beam scanning proton plans. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31362-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mirandola A, Molinelli S, Vilches Freixas G, Mairani A, Gallio E, Panizza D, Russo S, Ciocca M, Donetti M, Magro G, Giordanengo S, Orecchia R. Dosimetric commissioning and quality assurance of scanned ion beams at the Italian National Center for Oncological Hadrontherapy. Med Phys 2016; 42:5287-300. [PMID: 26328978 DOI: 10.1118/1.4928397] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To describe the dosimetric commissioning and quality assurance (QA) of the actively scanned proton and carbon ion beams at the Italian National Center for Oncological Hadrontherapy. METHODS The laterally integrated depth-dose-distributions (IDDs) were acquired with the PTW Peakfinder, a variable depth water column, equipped with two Bragg peak ionization chambers. fluka Monte Carlo code was used to generate the energy libraries, the IDDs in water, and the fragment spectra for carbon beams. EBT3 films were used for spot size measurements, beam position over the scan field, and homogeneity in 2D-fields. Beam monitor calibration was performed in terms of number of particles per monitor unit using both a Farmer-type and an Advanced Markus ionization chamber. The beam position at the isocenter, beam monitor calibration curve, dose constancy in the center of the spread-out-Bragg-peak, dose homogeneity in 2D-fields, beam energy, spot size, and spot position over the scan field are all checked on a daily basis for both protons and carbon ions and on all beam lines. RESULTS The simulated IDDs showed an excellent agreement with the measured experimental curves. The measured full width at half maximum (FWHM) of the pencil beam in air at the isocenter was energy-dependent for both particle species: in particular, for protons, the spot size ranged from 0.7 to 2.2 cm. For carbon ions, two sets of spot size are available: FWHM ranged from 0.4 to 0.8 cm (for the smaller spot size) and from 0.8 to 1.1 cm (for the larger one). The spot position was accurate to within ± 1 mm over the whole 20 × 20 cm(2) scan field; homogeneity in a uniform squared field was within ± 5% for both particle types at any energy. QA results exceeding tolerance levels were rarely found. In the reporting period, the machine downtime was around 6%, of which 4.5% was due to planned maintenance shutdowns. CONCLUSIONS After successful dosimetric beam commissioning, quality assurance measurements performed during a 24-month period show very stable beam characteristics, which are therefore suitable for performing safe and accurate patient treatments.
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Affiliation(s)
| | - S Molinelli
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | | | - A Mairani
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | - E Gallio
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | - D Panizza
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | - S Russo
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | - M Ciocca
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | - M Donetti
- INFN, Torino 10125, Italy and Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | - G Magro
- INFN-Dipartimento di Fisica, Università degli Studi di Pavia, Via U. Bassi 6, Pavia 27100, Italy and Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy
| | | | - R Orecchia
- Fondazione CNAO, strada Campeggi 53, Pavia 27100, Italy and Radiotherapy Division, European Institute of Oncology, Via Ripamonti 435, Milano 20141, Italy
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Coniglio A, Freixas GV, Santarelli A, Ciocca M, Begnozzi L. Quality assurance of phased array coils: Analysis of the noise amplification factor distribution. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.01.438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Molinelli S, Mairani A, Mirandola A, Vilches Freixas G, Tessonnier T, Giordanengo S, Parodi K, Ciocca M, Orecchia R. Dosimetric accuracy assessment of a treatment plan verification system for scanned proton beam radiotherapy: one-year experimental results and Monte Carlo analysis of the involved uncertainties. Phys Med Biol 2013; 58:3837-47. [DOI: 10.1088/0031-9155/58/11/3837] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Molinelli S, Mairani A, Mirandola A, Vilches Freixas G, Tessonnier T, Ciocca M. EP-1180: Dosimetric accuracy assessment of a treatment plan verification system for scanned proton beam radiotherapy. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33486-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Coniglio A, Di Renzi P, Vilches Freixas G, Della Longa G, Santarelli A, Capparella R, Nardiello B, Loiudice C, Bianchi S, D'Arienzo M, Begnozzi L. Multiple 3D inversion recovery imaging for volume T1 mapping of the heart. Magn Reson Med 2012; 69:163-70. [PMID: 22488966 DOI: 10.1002/mrm.24248] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2011] [Revised: 01/23/2012] [Accepted: 02/20/2012] [Indexed: 11/09/2022]
Abstract
In this article, a three-dimensional inversion recovery sequence was optimized with the aim of generating in vivo volume T(1) maps of the heart using a 1.5-T MR system. Acquisitions were performed before and after gadolinium diethylenetriamine penta-acetic acid (Gd-DTPA) administration in one patient with hypertrophic cardiomyopathy and in two healthy volunteers. Data were acquired with a multishot fast field echo readout using both ECG and respiratory triggers. A dedicated phantom, composed of four solutions with different T(1) values, was positioned on the subjects' thoracic region to perform patient-specific calibration. Pixel based T(1) maps were calculated with a custom Matlab(®) code. Phantom measurements showed a good accuracy of the technique and in vivo T(1) estimation of liver, skeletal muscle, myocardium, and blood resulted in good agreement with values reported in the literature. Multiple three-dimensional inversion recovery technique is a feasible and accurate method to perform T(1) volume mapping.
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Affiliation(s)
- A Coniglio
- AFaR, Department of Medical Physics, S. Giovanni Calibita, Fatebenefratelli Hospital, Rome, Italy.
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