Boots – shoes – and leggings
Patent
1985-10-28
1988-06-14
Fleming, Michael R.
Boots, shoes, and leggings
378150, 378 8, G06F 1542
Patent
active
047516445
ABSTRACT:
In a fourth generation CT scanner, source views or data sets are generated for reconstruction processing. A fan beam (16) of radiation rays is rotated around an image region (12) to irradiate subsets of detectors of a detector ring (10). A data sampler (B) samples the detectors of each irradiated subset a plurality of times, each time with the radiation fan beam displaced incremently from the preceding time to generate a plurality of the source views or data sheets from the same detectors. A plurality of consecutive source views or data sets are interleaved to produce a signal interleaved view or data fan. More specifically, the data sets are stored in data set memories (20-26) and interleaved serially into a data fan memory (30). Each time the fan beam rotates sufficiently to irradiate a different detector subset, an additional plurality of data sets are generated and interleaved into another data fan. The data fans are reconstructed (E) into a representation of an image of radiation absorptive properties of an object disposed in the image region. This reconstruction method is especially applicable to cardiac synchronization or gated patient scanning. This method improves the dynamic scan capacity of fourth generation scanners, improves tolerance to detector drifts, and improves tolerance to temporal x-ray fluctuations.
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DeMeester Gordon D.
Koka Narasimharao
Mattson Rodney A.
Tuy Heang K.
Fleming Michael R.
Picker International Inc.
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