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US 6,471,400 B1Granted
Adaptive CT monitor correction system and method
AssigneeAnalogic Corporation
InventorsSergey Simanovsky, Carl R. Crawford
Life of this patent
Estimating the term…
Abstract
Monitor detectors can be obstructed by the patient and/or the table, leading to image artifacts in a CT scanner. An algorithm for adaptive monitor correction is therefore provided, in which the algorithm replaces obstructed monitor readings with a value consistent with unobstructed monitor readings for the scan.
Claims19
A system for performing CT scans, comprising:
- an X-ray source for providing X-rays during a plurality of views of a CT scan;
- a subsystem for correcting for X-ray fluctuations occurring during a CT scan, including:
- measurement means for measuring at least one value of the level of X-rays received from the X-ray source during each view;
- determination means for determining which of the measured values of levels of X-rays represent at least partially attenuated measurements due to an unintended obstruction during the measurement;
- and
- replacement means for replacing measured values of levels of X-rays representing partially attenuated measurements with replacement values determined from values of remaining measurements.
3 more elements
A method of normalizing CT data acquired exposing an object with X-rays from a X-ray source through multiple views using a detector monitor subassembly, comprising:
- measuring at least one value of the level of X-rays received from the X-ray source during each view;
- determining which of the measured values of levels of X-rays represent at least partially attenuated measurements due to an unintended obstruction during the measurement;
- and
- replacing measured values of levels of X-rays representing partially attenuated measurements with replacement values determined from values of remaining measurements.
1 more element
Dependencies are inferred from the claim text.