Optimization of a coded aperture coherent scatter spectral imaging system for medical imaging

2015 ◽  
Author(s):  
Joel A. Greenberg ◽  
Manu N. Lakshmanan ◽  
David J. Brady ◽  
Anuj J. Kapadia
Keyword(s):  
Medical Imaging ◽  
Imaging System ◽  
Spectral Imaging ◽  
Coded Aperture ◽  
Coherent Scatter

SU-F-I-53: Coded Aperture Coherent Scatter Spectral Imaging of the Breast: A Monte Carlo Evaluation of Absorbed Dose

2016 ◽  
Vol 43 (6Part8) ◽  
pp. 3398-3399 ◽  
Author(s):  
R Morris ◽  
M Lakshmanan ◽  
G Fong ◽  
A Kapadia ◽  
J Greenberg
Keyword(s):  
Monte Carlo ◽  
Absorbed Dose ◽  
Spectral Imaging ◽  
Coded Aperture ◽  
Coherent Scatter ◽  
Monte Carlo Evaluation

scholarly journals High-dynamic range compressive spectral imaging by grayscale coded aperture adaptive filtering

2015 ◽  
Vol 35 (3) ◽  
pp. 53-60 ◽  
Author(s):  
Nelson Eduardo Diaz ◽  
Hoover Fabian Rueda Chacon ◽  
Henry Arguello Fuentes
Keyword(s):  
Dynamic Range ◽  
Imaging System ◽  
Three Dimensional ◽  
Spectral Imaging ◽  
Reconstruction Algorithm ◽  
High Dynamic Range ◽  
Data Cube ◽  
Coded Aperture ◽  
Coded Apertures

<p class="p1">The coded aperture snapshot spectral imaging system (CASSI) is an imaging architecture which senses the three dimensional informa-tion of a scene with two dimensional (2D) focal plane array (FPA) coded projection measurements. A reconstruction algorithm takes advantage of the compressive measurements sparsity to recover the underlying 3D data cube. Traditionally, CASSI uses block-un-block coded apertures (BCA) to spatially modulate the light. In CASSI the quality of the reconstructed images depends on the design of these coded apertures and the FPA dynamic range. This work presents a new CASSI architecture based on grayscaled coded apertu-res (GCA) which reduce the FPA saturation and increase the dynamic range of the reconstructed images. The set of GCA is calculated in a real-time adaptive manner exploiting the information from the FPA compressive measurements. Extensive simulations show the attained improvement in the quality of the reconstructed images when GCA are employed.  In addition, a comparison between traditional coded apertures and GCA is realized with respect to noise tolerance.</p>

Design and Fabrication of an Integrated Multi-Channel Optical Filter Working in Visible and near-Infrared Bands

2013 ◽  
Vol 289 ◽  
pp. 63-68
Author(s):  
Jian Jin ◽  
Si Di ◽  
Yu Pei Yao
Keyword(s):  
Medical Imaging ◽  
Wavelength Range ◽  
Near Infrared ◽  
Imaging System ◽  
Optical Filter ◽  
Spectral Imaging ◽  
Vacuum Deposition ◽  
Infrared Band ◽  
Novel Method ◽  
Channel Filter

Multi-channel optical filter can separate the target light so that it can be integrated in the multi-spectral imaging system for collecting the images in different spectrum. However, conventional multi-channel optical filter cannot work in visible band and near-infrared band simultaneously. This paper will present a novel method for fabricating the multi-channel filter which can work for the two bands. The method combines pigment-based colorant photoresist microlithography with traditional multi-film vacuum deposition technologies so that the filter has a high integrated level. The results of test show that the filter can be used for the wavelength range from 400 to1200 nm. Because of its wide working wavelength range, this optical filter has a great prospect of being applied in the fields of day and night surveillance, medical imaging, and so on.

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