Design and development of an MR-compatible PET scanner for imaging small animals

J. E. Mackewn, D. Strul, W. A. Hallett, P. Halsted, R. A. Page, S. F. Keevil, S. C R Williams, Simon R Cherry, P. K. Marsden

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

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 languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium Conference Record
EditorsJ.A. Seibert
Pages3271-3274
Number of pages4
Volume5
StatePublished - 2004
Event2004 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 2004Oct 22 2004

Other

Other2004 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
CountryItaly
CityRome
Period10/16/0410/22/04

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

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    Mackewn, J. E., Strul, D., Hallett, W. A., Halsted, P., Page, R. A., Keevil, S. F., Williams, S. C. R., Cherry, S. R., & Marsden, P. K. (2004). Design and development of an MR-compatible PET scanner for imaging small animals. In J. A. Seibert (Ed.), IEEE Nuclear Science Symposium Conference Record (Vol. 5, pp. 3271-3274). [M6-1]