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Spectral Breast Ct : Effect Of Adaptive Filtration On Ct Numbers, Ct Noise, And Ct Dose, Justin Silkwood
Spectral Breast Ct : Effect Of Adaptive Filtration On Ct Numbers, Ct Noise, And Ct Dose, Justin Silkwood
LSU Master's Theses
Purpose: Adaptive filtration facilitates spectral breast CT by decreasing count rate and dynamic range requirements of photon counting detectors. This project investigated the effect of adaptive filtration on beam hardening, CT numbers, noise, and dose in dedicated breast CT. Methods: Adaptive filters were simulated to provide a flat fluence at the detector surface when used with a 14 cm breast phantom at 120 kVp. Beam hardening with each filter type was measured against increasing x-ray beam half-fan angle.. Breast CT images were simulated with and without an adaptive filter in the beam at multiple tube voltages. CT number, noise, and …