Now showing items 11-20 of 288
Quantitative I-131 SPECT Reconstruction using CT Side Information from Hybrid Imaging
(IEEE, 2009-10-24)
A penalized-likelihood (PL) SPECT reconstruction method using a modified regularizer that accounts for anatomical boundary side information was implemented to achieve accurate estimates of both the total target activity ...
Injectable microparticle-gel system for prolonged and localized lidocaine release. I. In vitro characterization
(Wiley Subscription Services, Inc., A Wiley Company, 2004-09-01)
Current treatment protocol for postoperative pain is to infuse anesthetic solution around nerves or into the epidural space. This clinical practice is beset by the short duration of the anesthetic effect unless the infusion ...
Nano‐/microfiber scaffold for tissue engineering: Physical and biological properties
(Wiley Subscription Services, Inc., A Wiley Company, 2012-11)
Alginate hydrogel (AH) has intrinsic physical and biological limitations that hinder its broader application in tissue engineering. We hypothesized that the inclusion of nanofibers in the hydrogel and the use of a biotemplate ...
3D PET Reconstruction with FORE and WLS-OS-EM
(IEEE, 2002-11-10)
2D PET reconstructions by the ordered subsets version of the ML-EM algorithm (typically referred to as "OS-EM") assume that the random- and scattered-corrected coincidence data retain their Poisson statistics. Negative ...
Structural and mechanical evaluations of a topology optimized titanium interbody fusion cage fabricated by selective laser melting process
(Wiley Subscription Services, Inc., A Wiley Company, 2007-11)
A topology optimized lumbar interbody fusion cage was made of Ti-Al6-V4 alloy by the rapid prototyping process of selective laser melting (SLM) to reproduce designed microstructure features. Radiographic characterizations ...
An Expanded Theoretical Treatment of Iteration-Dependent Majorize-Minimize Algorithms
(IEEE, 2007-09-17)
The majorize-minimize (MM) optimization technique has received considerable attention in signal and image processing applications, as well as in statistics literature. At each iteration of an MM algorithm, one constructs ...
Joint Estimation of Respiratory Motion and Activity in 4D PET Using CT Side Information
(IEEE, 2006-04-06)
In previous work, we proposed a Poisson statistical model for gated PET data in which the distribution was parametrized in terms of both image intensity and motion parameters. The motion parameters related the activity ...
Iterative Tomographic Image Reconstruction Using Fourier-Based Forward and Back-Projectors
(IEEE, 2004-04-05)
Iterative image reconstruction algorithms play an increasingly important role in modern tomographic systems, especially in emission tomography. With the fast increase of the sizes of the tomographic data, reduction of the ...
Engineering of nanoparticle size via electrohydrodynamic jetting
(Wiley Periodicals, Inc., 2016-03)
Engineering the physical properties of particles, especially their size, is an important parameter in the fabrication of successful carrier systems for the delivery of therapeutics. Here, various routes were explored for ...
Penalized Likelihood Transmission Image Reconstruction:Unconstrained Monotonic Algorithms
(IEEE, 2004-04-15)
Statistical reconstruction algorithms in transmission tomography yield improved images relative to the conventional FBP method. The most popular iterative algorithms for this problem are the conjugate gradient (CG) method ...