Scintillating array for real – time high – resolution ion therapy dosimetry – Initial Design and Simulations

Guerreiro, Duarte; Sampaio, J. M.; Peralta, L.; Gentil, J.; Santos, Matilde; Lopes, L.; Assis, P.; Ferreira, Miguel A.; Nogueira, José Carlos; Evans, Guiomar Gaspar de Andrade; Teubig, P.; Gurriana, L.; Oliva, Abel; Herrera, Federico; Alves, F. S. F.; Carmo, S.J.C. do

doi:10.22323/1.380.0041

Cited by 1 publication

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“…Calibration data were obtained by irradiating 6 films with dose ranging between 0.38 and 14.37 Gy, corresponding to pixel values ranging between 15 and 113. The beam amplitude pixel values were fit in Python to the applied dose in Gy using the four-parameter Rodbard (logistics) function shown in Equation (1), which represents the non-linear behaviour of the film when irradiated [46,47]:…”

Section: Ionization Chamber and Radiochromic Filmmentioning

confidence: 99%

“…Radiotherapy systems employing or potentially benefiting from multipoint sensing range from particle radiotherapy [1][2][3] to brachytherapy [4][5][6][7][8][9] and teletherapy [10][11][12][13]. The simultaneous, real-time monitoring of multiple points inside and outside of an irradiated volume using fibre-based sensors is currently under investigation by several groups with some success, namely in the form of the commercially available Hyperscint™ scintillator dosimeter [14]-a system that utilises a spectrometer and employs a spectral separation method to chromatically remove induced Čerenkov and fluorescence from the total signal [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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A Multi-Point Optical Fibre Sensor for Proton Therapy

Penner,

Usherovich,

Andru

et al. 2024

Electronics

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As the technology to deliver precise and very high radiotherapeutic doses with narrow margins grows to better serve patients with complex radiotherapeutic needs, so does the need for sensors and sensor systems that can reliably deliver multi-point dose monitoring and dosimetry for enhanced safety and access. To address this need, we investigated a novel five-point scintillator system for simultaneously sampling points across a 74 MeV proton beam with a Hamamatsu 16-channel MPPC array. We studied the response across beam widths from 25 mm down to 5 mm in diameter and in multiple depths to observe beam penumbrae and output factors as well as depth–dose. We found through comparison to ionization chambers and radiochromic film that the array is capable of measurements accurate to within 8% in the centre of proton beams from 5 to 25 mm in diameter, and within 2% at 3.5 cm depth in water. The results from three trials are repeatable after calibration to within <1%. Overall, the five optical fibre sensor system shows promise as a fast, multipoint relative dosimetry system.

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Section: Ionization Chamber and Radiochromic Filmmentioning

confidence: 99%