Image analysis – Applications – Biomedical applications
Reexamination Certificate
2005-12-27
2005-12-27
Couso, Jose L. (Department: 2621)
Image analysis
Applications
Biomedical applications
C250S363030
Reexamination Certificate
active
06980683
ABSTRACT:
A device and method for on-line correction of patient motion in three-dimensional positron emission tomography. The devices encompass an on-line hardware pipelining architecture to support 3D translation, normalization, and weighted histogramming as required. Five stages of processing for the PET event stream are utilized in the present invention. Each stage feeds the next with progressively modified event packets proceeding at a processing speed of at least 10M packets/sec. Stage1calculates an event correction factor (ECF) for each incoming detector-pair event packet. This ECF is incorporated into the event packet for use later in Stage5.Stage2converts the detector-index-pair content of each packet into (x,y,z) pair content. Specifically, the representation of each detector element is converted from a discrete crystal index into a 3-D coordinate index. Stage3transforms the (x,y,z) pair into an (x′,y′,z′) pair. Stage4converts the (x′,y′,z′) pair into a bin address. Output from Stage5is a normalized projection data set available at the end of each acquisition frame. Stage5performs on-line weighted histogramming.
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Couso Jose L.
CTI PET Systems, Inc.
Lu Tom Y.
Pitts & Brittian P.C.
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