Automated crystal identification achieved via watershed segmentation
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United States of America Patent
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Jul 22, 2014
Grant Date -
Nov 28, 2013
app pub date -
Jul 31, 2013
filing date -
Jun 15, 2010
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Abstract
A nuclear imaging system includes a crystal identification system which receives a flood image which includes a plurality of peaks, each peak responsive to radiation detected by a corresponding scintillator crystal. A crystal identification processor partitions the flood image into a plurality of candidate regions with a watershed segmentator implementing a watershed algorithm. The candidate regions are linked in an adjacency graph, and then classified as background or relevant, where relevant regions contain a peak within the watershed lines. The regions are then assigned to a crystal according to an objective function and an assignability score. A calibration processor maps the peaks to a rectangular grid.
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