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Development of a small gamma camera using wavelength-shifting fibres coupled to inorganic scintillation crystals for imaging 140 keV gamma rays

Soares, AJ; Cullum, I; Miller, DJ; Royle, GJ; Speller, RD; (1999) Development of a small gamma camera using wavelength-shifting fibres coupled to inorganic scintillation crystals for imaging 140 keV gamma rays. In: (pp. pp. 1277-1284).

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Abstract

We are developing a small gamma camera for scintimammography with Tc99m (140 keV). The camera is based on coupling wavelength-shifting fibres (WSF) to the surface of an inorganic scintillation crystal - CsI(Na) - in order to obtain information about the position of interaction of the gamma rays. We have performed experimental measurements on the light output of 1 mm round multi-clad WSFs coupled to two CsI(Na) slabs, 3 and 5 mm thick. The results show a mean of 3.8 photoelectrons per gamma ray interaction of Co57 122 keV, with a mean of 1 photoelectron at the fibre located nearest the collimated beam of gamma rays, for the 3 mm thick crystal. Simulations based on the single electron response of Photomultiplier Tubes show that a 1.7 mm FWHM spatial resolution can be achieved with this camera design. The camera can be shaped to suit any application, it is compact and has low cost, which, together with its predicted performance in terms of spatial resolution, makes this concept very promising as a small gamma camera for 140 keV.

Type: Proceedings paper
Title: Development of a small gamma camera using wavelength-shifting fibres coupled to inorganic scintillation crystals for imaging 140 keV gamma rays
ISBN: 0780350227
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1312300
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