Local threshold for segmented attenuation correction of PET imaging of the thorax

Local threshold for segmented attenuation correction technique has been developed for positron emission tomography using short (2-3 minutes) post-injection transmission scans. The technique implements an optimal threshold method on localized histograms to get pseudo-anatomic segmentation on transmis...

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Bibliographic Details
Main Authors: Xu, M., Luk, W.K., Cutler, P.D., Digby, W.
Format: Conference Proceeding
Language:English
Subjects:
Attenuation
Biological tissues
Histograms
Image segmentation
Lungs
Pollution measurement
Positron emission tomography
Radiology
Thorax
Throughput
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Summary:Local threshold for segmented attenuation correction technique has been developed for positron emission tomography using short (2-3 minutes) 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 coefficient are assigned to correspondent 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 has been found linearly correlated with the standard method (15 minutes, pre-injection transmission scans), reducing noise in the final emission Images, eliminating process for substraction emission data from transmission scan, cutting down scan time and increasing patient throughput.< >
DOI:10.1109/NSSMIC.1993.373615