GAIN CALIBRATION AND CORRECTION IN RADIATION SYSTEM

• Main Authors: Shaughnessy, Charles H, Rozas, David, Roshi, Aleksander
• Format: Patent
• Language: English
• Published: 27.06.2019
• Subjects: BASIC ELECTRIC ELEMENTS; CALCULATING; COMPUTING; COUNTING; DIAGNOSIS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY

Among other things, one or more techniques and/or systems for calibration of a radiation system to compute a gain correction(s) are provided. A calibration procedure is performed during which a portion of the detector array is shadowed by an object, causing the detector array to be non-uniformly exposed to radiation. A portion of a projection generated from the calibration procedure and indicative of radiation that did not traverse the object is separated from a portion of the projection indicative of radiation that did traverse the object, and a gain correction(s) is computed from the portion of the projection indicative of radiation that did not traverse the object (e.g., and is thus indicative of radiation that merely traversed air).