46 citations · 93 across the 4 of their papers we have counts for
6 papers · 1 filter
Optimized Spatial-Spectral CT for Multi-Material Decomposition
Matthew Tivnan, Wenying Wang, Steven Tilley +2
Spectral CT is an emerging modality that uses a data acquisition scheme with varied spectral responses to provide enhanced material discrimination in addition to the structural inf…
Physical Modeling and Performance of Spatial-Spectral Filters for CT Material Decomposition
Matthew Tivnan, Steven Tilley, J. Webster Stayman
Material decomposition for imaging multiple contrast agents in a single acquisition has been made possible by spectral CT: a modality which incorporates multiple photon energy spec…
High-Fidelity Modeling of Detector Lag and Gantry Motion in CT Reconstruction
Steven Tilley, Alejandro Sisniega, Jeffrey H. Siewerdsen +1
Detector lag and gantry motion during x-ray exposure and integration both result in azimuthal blurring in CT reconstructions. These effects can degrade image quality both for high-…
Penalized-Likelihood Reconstruction with High-Fidelity Measurement Models for High-Resolution Cone-Beam Imaging
Steven Tilley, Matthew Jacobson, Qian Cao +4
We present a novel reconstruction algorithm based on a general cone-beam CT forward model which is capable of incorporating the blur and noise correlations that are exhibited in fl…
High-Fidelity Modeling of Shift-Variant Focal-Spot Blur for High-Resolution CT
Steven Tilley, Wojciech Zbijewski, J. Webster Stayman
Dedicated application-specific CT systems are popular solutions to high-resolution clinical needs. Some applications, such as mammography and extremities imaging, require spatial r…
Model-based Iterative Reconstruction for Flat-Panel Cone-Beam CT with Focal Spot Blur, Detector Blur, and Correlated Noise
Steven Tilley, Jeffrey H. Siewerdsen, J. Webster Stayman
While model-based reconstruction methods have been successfully applied to flat-panel cone-beam CT (FP-CBCT) systems, typical implementations ignore both spatial correlations in th…