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• W1998436666 abstract "Cone-beam CT images of a patient with a pre-defined distribution of noise in the image and dose to the patient can be accomplished through the development of advanced compensation schemes. Such compensation schemes involve delivery of x-ray fluence patterns that vary in intensity both across a single projection image (u,v) and for different projection view angles (&#952;) and provide the ability to perform intensity-modulated cone-beam CT. Implementation of an intensity-modulated cone-beam CT system for task-specific imaging has potential for tremendous reductions in patient dose and x-ray scatter reaching the detector. Pursuing this advanced imaging technique requires detailed characterization of the cone-beam CT platform. Determination of appropriately modulated fluence patterns relies on knowledge of numerous properties of the imaging system, including the constraints imposed by the modulator, the magnitude of x-ray scatter under different patient sizes and modulator positions, and properties of the detector. With an estimate of the patient anatomy and knowledge of the imaging system, an iterative process can be used to determine modulated fluence patterns corresponding to an image prescribed for the specific task and patient. Delivery of such modulated fluence patterns provide a CBCT image tailored to a specific patient and imaging task offering the optimum balance between image quality and patient dose. Specifically, arbitrary regions of interest requiring high image signal-to-noise ratio can be generated through knowledgeable spatio-angular intensity modulation, allowing image quality to degrade in other regions in order to minimize x-ray scatter and imaging dose." @default.
• W1998436666 created "2016-06-24" @default.
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• W1998436666 date "2007-03-08" @default.
• W1998436666 modified "2023-10-05" @default.
• W1998436666 title "Intensity-modulated fluence patterns for task-specific imaging in cone-beam CT" @default.
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• W1998436666 doi "https://doi.org/10.1117/12.713724" @default.
• W1998436666 hasPublicationYear "2007" @default.
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