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First results with high-resolution PET detector modules using wavelength-shifting fibers

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4 Author(s)
Worstell, W. ; Dept. of Phys., Boston Univ., MA, USA ; Johnson, O. ; Kudrolli, H. ; Zavarzin, V.

The authors have constructed and tested prototype PET detector modules incorporating wavelength-shifting fiber ribbons alternating with thin CsI(Na) scintillator plates in multilayer stacks. Modules with cross-sectional area of 11 cm×11 cm and with 9 mm of total crystal thickness have been tested. A reconstructed spatial resolution of 3 mm FWHM has been obtained for a line source, with an energy resolution of <20% and a time resolution of 25 ns FWHM. Energy measurements and coincidence timing are provided by 4 photomultipliers in an Anger array on one 11 cm×11 cm module face. Multiplexed fiber readout has been implemented with multianode photomultipliers coupled to several fiber ribbons. The methods and resolution achieved are readily extended to larger systems in a straightforward and cost-effective manner. Results of tests with several phantoms are presented

Published in:

Nuclear Science Symposium, 1997. IEEE  (Volume:2 )

Date of Conference:

9-15 Nov 1997

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