Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Reexamination Certificate
2005-02-08
2005-02-08
Hannaher, Constantine (Department: 2878)
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
C250S363020, C250S363040
Reexamination Certificate
active
06852980
ABSTRACT:
A method and apparatus for on-line DOI rebinning for LSO PET/SPECT to improve spatial resolution, for use in a hybrid Positron Emission Tomography (PET)/Single Photon Emission Computed Tomography (SPECT) system running in PET-mode. Data acquisition hardware is used to feed a detector pair coincidence event stream to an on-line rebinner. Gamma centroid location measurements are made by rastering assumed transaxial and radial head positions and the corresponding rebinning maps for optimal back-projected image resolution. Optimal positions are found by collecting a 64-bit list mode file, assuming a crystal position as the centroid for each of the heads, defining a sequence for varying the assumed positions, making the rebinning look-up tables, rebinning the list mode data, histogramming and reconstructing the image, assessing the image resolution, recording the best resolution number and the associated trial position variables, repeating these on the next trial variable set.
REFERENCES:
patent: 6490476 (2002-12-01), Townsend et al.
S.J. Glick, et al., “the Effect of Photon Incident Angle on Spatial Resolution with Thick Crystal Hybrid PET,” The Journal of Nuclear Medicine—Proceedings of the 47th Annual Meeting, Jun. 5, 2000.
Bendriem Bernard
Casey Michael E.
Jones William F.
CTI PET Systems, Inc.
Hannaher Constantine
Moran Timothy J.
Pitts & Brittian P.C.
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