Local threshold for segmented attenuation correction of PET imaging of the thorax
- Mallinckrodt Inst. of Radiology, St. Louis, MO (United States)
- Mallinckrodt Inst. of Radiology, St. Louis, MO (United States) CTI-PET System, Inc., Knoxville, TN (United States)
- CTI-PET System, Inc., Knoxville, TN (United States)
A local threshold for segmented attenuation correction technique has been developed for positron emission tomography using short post-injection transmission scans. The technique implements an optimal threshold method on localized histograms to get pseudo-anatomic segmentation on transmission images. Theoretical values of attenuation coefficients are assigned to corresponding anatomic regions. Emission images are reconstructed using attenuation correction factors computed by forward-projecting segmented transmission images. Phantoms and clinical cardiac images are studied using this technique. The technique corrects emission images with accuracy similar to the standard, pre-injection method, reduces noise in the corrected emission images, and offers the potential for increased patient throughput by enabling shorter, post-injection data acquisition.
- OSTI ID:
- 6906776
- Report Number(s):
- CONF-931051--
- Journal Information:
- IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 41:4PT1; ISSN 0018-9499; ISSN IETNAE
- Country of Publication:
- United States
- Language:
- English
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62 RADIOLOGY AND NUCLEAR MEDICINE
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CHEST
COMPUTERIZED TOMOGRAPHY
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EFFICIENCY
EMISSION COMPUTED TOMOGRAPHY
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