A count-dependent reconstruction filter optimized to match the lesion size and the object contrast in SPECT
Journal Article
·
· IEEE Transactions on Nuclear Science
OSTI ID:148084
- Pohang Univ. of Science and Technology (Korea, Republic of). Dept. of Mathematics
The authors present a new formulation, based on a physical model of SPECT lesion delectability, for a reconstruction filter optimized to improve lesion delectability. To determine the optimal parameters for the filter, the authors focused on improving the local delectability of the lesion corresponding to the SPECT detection limit, or equivalently increasing the local S/N ratio of the threshold detectable lesion. The threshold lesion was determined by the minimum detectable lesion size (MDLS) from the SPECT lesion delectability contrast-detail curve. The proposed filter showed the characteristics of resolution recovery and smoothing for MDLS in the resolution-limited and photon-limited regions, respectively, compensating for the relative impacts of the main limitation factors on threshold detectability. In simulations which varied physical factors such as photon counts, object contrast and detector system resolution, the proposed filter produced a considerable improvement in SPECT image quality in terms of lesion detectability.
- OSTI ID:
- 148084
- Report Number(s):
- CONF-941061--
- Journal Information:
- IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 42; ISSN 0018-9499; ISSN IETNAE
- Country of Publication:
- United States
- Language:
- English
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