NDLI: Fast and precise verification of proton beam position, range, and dose using a plastic scintillator at PET-dedicated cyclotrons

Content Provider	IEEE Xplore Digital Library
Author	Ghithan, S. do Carmo, S.J.C. Ferreira Marques, R. Fraga, F.A.F. Simoes, H. Alves, F. Crespo, P.
Copyright Year	2013
Description	Author affiliation: Inst. de Cienc. Nucl. Aplic. a Saude, Univ. of Coimbra, Coimbra, Portugal (do Carmo, S.J.C.; Alves, F.) \|\| Lab. de Instrumentacao e Fis. Exp. de Particulas, Coimbra, Portugal (Ghithan, S.; Ferreira Marques, R.; Fraga, F.A.F.; Simoes, H.; Crespo, P.)
Abstract	The number of cyclotrons capable of accelerating protons to about 20MeV is increasing throughout the world. Originally aiming at the production of positron emission tomography (PET) radionuclides, some of these facilities are equipped with several beam lines suitable for scientific research. Radiobiology, radiophysiology, and other dosimetric studies can be performed using these beam lines. In this work, we report on experimental results and SRIM/TRIM simulations, which aim at measuring the Bragg peak of the 18 -MeV proton beam from the PET cyclotron. By using a piece of plastic scintillator and a D-link Ethernet-based camera, we measured the proton beam range and width with a spatial resolution of 0.1mm. The relation between the intensity of the scintillation light, which was generated by irradiation with the proton beam, and the cyclotron stripper current shows good linearity below 0.6 μA. In addition, we plotted the stability of the proton beam range within the scintillator block. The ranges of the proton beam in the plastic scintillator were used to assess its energy after trespassing one or two Havar windows and either a 40-cm-long or a 2.4-m-long aluminum pipe. The initial energy of the proton beam from the PET cyclotron was found to be 18MeV. The dose calculation follows immediately by taking into consideration the total beam current delivered on a target, which was measured by means of a thin aluminum foil trespassed by the beam and readout by in-house made transimpedance amplifiers.
Starting Page	1
Ending Page	8
File Size	803222
Page Count	8
File Format	PDF
e-ISBN	9781479905348
DOI	10.1109/NSSMIC.2013.6829604
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-27
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Particle beams Plastics Cyclotrons Aluminum Protons Radiation effects Positron emission tomography SRIM/TRIM Bragg peak Cyclotron Dosimetry Longitudinal and lateral beam profiles Plastic scintillator
Content Type	Text
Resource Type	Article

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