3 papers
stat.AP2014
Efficient Low Dose X-ray CT Reconstruction through Sparsity-Based MAP Modeling
SayedMasoud Hashemi, Soosan Beheshti, Patrick R. Gill +2
Ultra low radiation dose in X-ray Computed Tomography (CT) is an important clinical objective in order to minimize the risk of carcinogenesis. Compressed Sensing (CS) enables signi…
physics.optics2013
Odd-symmetry phase gratings produce optical nulls uniquely insensitive to wavelength and depth
Patrick R. Gill
I present the analysis of a new class of diffractive optical element, the odd-symmetry phase grating, which creates wavelength- and depth-robust features in its near-field diffract…
physics.optics2011
Robustness of Planar Fourier Capture Arrays to Colour Changes and Lost Pixels
Patrick R. Gill, Changhyuk Lee, Sriram Sivaramakrishnan +1
Planar Fourier capture arrays (PFCAs) are optical sensors built entirely in standard microchip manufacturing flows. PFCAs are composed of ensembles of angle sensitive pixels (ASPs)…