Abstract
An MR compatible PET system has been assigned and is currently under construction. It will consist of four concentric rings of LSO crystals, each coupled to one of eight multi-channel photomultplier tubes via 3.5m optical fibres. The photomultiplier tubes may be located outside the main magnetic field of the MR scanner. A highly reproducible method has been established to optimise the amount of scintillation light that reaches the PM tubes, as this factor will heavily influence the scanner performance. Two small sections of the scanner, each containing 4 by 4 crystal arrays, demonstrated good flood position histograms with all sixteen channels clearly identifiable. The light loss through a fibre of length of 3.25m was approximately 70%. The spatial resolution of the two arrays in coincidence was measured at 1.6mm (FWHM). The temporal resolution of one array in coincidence with a single LSO crystal was measured to be 10.9ns. A technique for improving sampling at the centre of the field of view within the scanner has also been investigated, whereby the concentric rings are offset with respect to one another. An offset of one quarter of the crystal width between layers results in significantly improved sampling. These results indicate that the scanner will be capable of carrying out the studies for which it has been designed.
Original language | English (US) |
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Title of host publication | IEEE Nuclear Science Symposium Conference Record |
Editors | J.A. Seibert |
Pages | 3271-3274 |
Number of pages | 4 |
Volume | 5 |
State | Published - 2004 |
Event | 2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors - Rome, Italy Duration: Oct 16 2004 → Oct 22 2004 |
Other
Other | 2004 Nuclear Science Symposium, Medical Imaging Conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors |
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Country/Territory | Italy |
City | Rome |
Period | 10/16/04 → 10/22/04 |
ASJC Scopus subject areas
- Computer Vision and Pattern Recognition
- Industrial and Manufacturing Engineering