Referenced Items are not available for this document.
A prototype annihilation photon detector combining a 50 mm×50 mm×8 mm BaF2 scintillator with an MWPC (multiwire proportional chamber) filled with a photoionizing vapor (TMAE) at low pressure has been constructed. The structure of the detector is currently undergoing optimization but its present performance includes 8 mm FWHM (full width at half maximum) spatial resolution, 12-ns timing resolution, and 19% efficiency. It is intended that this technology, once proven, should form the basis for a clinical PET (positron emission tomography) system. In order to cover the large active areas (600 mm×400 mm) of a clinical system, it will be necessary to use tiles of BaF2. Crystal boundary effects on image quality, studied using Monte Carlo methods, show degraded spatial resolution by 40% axially and 27% radially/tangentially for a 6×4 array of 16 mm-thick crystals replacing a hypothetical large single crystal. Further studies to characterize the distribution of scattered events in the proposed camera are described
Published in:
Nuclear Science, IEEE Transactions on
(Volume:38
,
Issue:
2
)
Date of Publication: Apr 1991
- Page(s):
- 703 - 708
- ISSN :
- 0018-9499
- INSPEC Accession Number:
- 3948704
- Digital Object Identifier :
- 10.1109/23.289377
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Apr 1991
- Sponsored by :
- IEEE Nuclear and Plasma Sciences Society
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