Penalized-Likelihood Reconstruction with High-Fidelity Measurement Models for High-Resolution Cone-Beam Imaging

no code implementations • 14 Dec 2017 • Steven Tilley II, Matthew Jacobson, Qian Cao, Michael Brehler, Alejandro Sisniega, Wojciech Zbijewski, J. Webster Stayman

In a simulation study, GPL-BC was able to achieve lower bias as compared to deblurring followed by FDK as well as a model-based reconstruction method without integration of measurement blur.

Medical Physics

High-Fidelity Modeling of Shift-Variant Focal-Spot Blur for High-Resolution CT

no code implementations • 27 Jun 2017 • Steven Tilley II, Wojciech Zbijewski, J. Webster Stayman

While the high-fidelity models used here are applied using the specifications of a dedicated extremities imaging system, the methods are general and may be applied to optimize imaging performance in any CT system.

Medical Physics

Modeling shift-variant X-ray focal spot blur for high-resolution flat-panel cone-beam CT

no code implementations • 17 Oct 2016 • Steven Tilley II, Wojciech Zbijewski, Jeffrey H. Siewerdsen, J. Webster Stayman

In both experiments image quality using the shift-variant model was significantly improved over approaches that modeled no blur or only a shift-invariant blur, suggesting a potential means to overcome traditional CBCT spatial resolution and system design limitations.

Medical Physics Optimization and Control