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First tests in the application of silicon photomultiplier arrays to dose monitoring in hadron therapy

G. Llosa 1 J. Barrio 1 C. Lacasta 1 S. Callier 2 L. Raux 2 C. de la Taille 2
1 IFIC - Instituto de Fisica Corpuscular
2 LAL - Laboratoire de l'Accélérateur Linéaire
Abstract : A detector head composed of a continuous LaBr3 crystal coupled to a silicon photomultiplier array has been mounted and tested, for its use in a Compton telescope for dose monitoring in hadron therapy. The LaBr3 crystal has 16 mm×18 mm×5 mm size, and it is surrounded with reflecting material in five faces. The SiPM array has 16 (4 ×4) elements of 3 mm×3 mm size. The SPIROC1 ASIC has been employed as readout electronics. The detector shows a linear behavior up to 1275 keV. The energy resolution obtained at 511 keV is 7% FWHM, and it varies as one over the square root of the energy up to the energies tested. The variations among the detector channels are within 12%. A preliminary measurement of the timing resolution gives 7 ns FWHM. The spatial resolution obtained with the center of gravity method is 1.2 mm FWHM. The tests performed confirm the correct functioning of the detector.
Keywords : Hadron therapy Compton imaging LaBr3 Continuous crystal SiPM MPPC G-APD
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Conference papers
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http://hal.in2p3.fr/in2p3-00551630
Contributor : Sabine Starita <>
Submitted on : Tuesday, January 4, 2011 - 11:19:51 AM
Last modification on : Saturday, December 26, 2020 - 1:46:05 PM

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G. Llosa, J. Barrio, C. Lacasta, S. Callier, L. Raux, et al.. First tests in the application of silicon photomultiplier arrays to dose monitoring in hadron therapy. Imaging 2010. International conference on imaging techniques in subatomic physics, astrophysics, medicine, biology and industry, Jun 2010, Stockholm, Sweden. pp.S96-S99, ⟨10.1016/j.nima.2010.12.092⟩. ⟨in2p3-00551630⟩

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