Radiant energy – Calibration or standardization methods
Reexamination Certificate
2007-06-19
2007-06-19
Porta, David (Department: 2884)
Radiant energy
Calibration or standardization methods
Reexamination Certificate
active
11165786
ABSTRACT:
Point source responses of pinhole apertures in a non-uniform grid mask used to spatially calibrate a gamma camera can be modeled as a two-dimensional Gaussian function with a set of seven parameters. The Gaussian parameters can be measured using a surface-fitting algorithm that seeks minimum error in the least squares sense. The process is repeated for data from each pinhole location and the data are added together to generate a complete model of the flood image from the mask, which then can be used in a peak detection process for clinical images.
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Chapman James T.
Malmin Ronald E.
Wang Sharon Xiaorong
Porta David
Siemens Medical Solutions USA , Inc.
Webb Christopher G
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