Now showing items 21-30 of 204
Monitoring Chemical Reactions by Using Ion-Channel-Forming Peptides
(WILEY-VCH Verlag, 2006-03-06)
No Abstract
Channelized Hotelling Observer Performance for Penalized-Likelihood Image Reconstruction
(IEEE, 2002-11-10)
What type of regularization method is optimal for penalized-likelihood image reconstruction when the imaging task is signal detection based on a channelized Hotelling (CHO) observer? To answer such questions, one would ...
Globally Convergent Image Reconstruction for Emission Tomography Using Relaxed Ordered Subsets Algorithms
(IEEE, 2003-06-25)
We present two types of globally convergent relaxed ordered subsets (OS) algorithms for penalized-likelihood image reconstruction in emission tomography: modified block sequential regularized expectation-maximization (BSREM) ...
3-D Monte Carlo-Based Scatter Compensation in Quantitative I-131 SPECT Reconstruction
(IEEE, 2006-03-27)
We have implemented highly accurate Monte Carlo based scatter modeling (MCS) with 3-D ordered subsets expectation maximization (OSEM) reconstruction for I-131 single photon emission computed tomography (SPECT). The scatter ...
Relaxed Ordered Subsets Algorithm for Image Restoration of Confocal Microscopy
(IEEE, 2002-11-07)
The expectation-maximization (EM) algorithm for maximum-likelihood image recovery converges very slowly. Thus, the ordered subsets EM (OS-EM) algorithm has been widely used in image reconstruction for tomography due to an ...
Update on HE vs UHE Collimation for Focal Total-activity Quantification in I-131 SPECT Using 3D OSEM
(IEEE, 2003-10-19)
We calibrated a scintillation camera for the counts-to-activity conversion factor, CF, by measuring a phantom consisting of a sphere containing a known 131-I activity placed within an elliptical cylinder. Within a 3D OSEM ...
Regularized Estimation of Stokes Images from Polarimetric Measurements
(SPIE, 2008-01-28)
In the remote sensing context the goal of imaging polarimetry is to map the state of polarization of a scene
of interest. The polarization state of a scene can be represented by the Stokes parameters. Since the Stokes
parameters ...
Fast interpolation operations in non-rigid image registration
(SPIE, 2005-02-17)
Much literature on image registration1–3 has worked with purely geometric image deformation models. For such models,
interpolation/resampling operations are often the computationally intensive steps when iteratively ...
Human motion simulation for vehicle and workplace design
(Wiley Subscription Services, Inc., A Wiley Company, 2007-09)
Digital Human Models (DHMs) are fast becoming an effective tool for performing proactive ergonomics analysis and design. DHM software, such as Jack, SAFEWORK, RAMSIS, SAMMIE, and the UM 3DSSP, are meant to assist a designer ...
Three-dimensional Non-local Edge-preserving Regularization for PET Transmission Reconstruction
(IEEE, 2000-10-15)
Tomographic image reconstruction using statistical methods can provide more accurate system modeling, statistical models, and physical constraints than the conventional filtered backprojection (FBP) method. Because of the ...