Initial Characterization of a Nonpixelated Scintillator Detector in a PET Prototype Demonstrator

Previous experimental results have demonstrated that a PET detector module based on a 20times10times10 mm LSO block read out by a Hamamatsu S8550 APD array is able to determine the impinging position of perpendicularly incident 511-keV photons with a resolution better than 2-mm FWHM. A prototype PET...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2006-10, Vol.53 (5), p.2543-2548
Main Authors: Bruyndonckx, P., Lemaitre, C., Leonard, S., Schaart, D.R., van der Laan, D.J., Maas, M.C., Devroede, O., Yibao Wu, Krieguer, M., Tavernier, S.
Format: Article
Language:English
Subjects:
Animals
Blocking
Computer simulation
Construction
Detectors
Head
Image resolution
Light sharing
Monte Carlo methods
neural network
PET
Photonic crystals
Positron emission
Positron emission tomography
Prototypes
scintillator
Sensor arrays
Solid scintillation detectors
Spatial resolution
Tomography
Two dimensional displays
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Summary:Previous experimental results have demonstrated that a PET detector module based on a 20times10times10 mm LSO block read out by a Hamamatsu S8550 APD array is able to determine the impinging position of perpendicularly incident 511-keV photons with a resolution better than 2-mm FWHM. A prototype PET demonstrator using two of these detector heads was build and evaluated. The axial and transaxial resolution measured in two-dimensional (2-D) OSEM and 2-D FBP reconstructed images is better than 1.5- and 2-mm FWHM, respectively, for radial distances less than 15 mm. A Monte Carlo simulation showed that a four-ring PET scanner based on these monolithic scintillator blocks has a sensitivity which is about 2.5 times higher than the sensitivity of a similar system equipped with detector heads using a 4times8 matrix of 2times2times10 mm LSO pixels
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2006.875998