Randoms variance reduction in 3D PET.

Published in Physics in Medicine and Biology

In positron emission tomography (PET), random coincidence events must be removed from the measured signal in order to obtain quantitatively accurate data. The most widely implemented technique for estimating the number of random coincidences on a particular line of response is the delayed coincidence channel method. Estimates obtained in this way a...

Algorithms for calculating detector efficiency normalization coefficients for true coincidences in 3D PET.

Published in Physics in Medicine and Biology

Accurate normalization of lines of response in 3D PET is a prerequisite for quantitative reconstruction. Most current methods are component based, calculating a series of geometric and intrinsic detector efficiency factors. We have reviewed the theory behind several existing algorithms for calculating detector efficiency factors in 2D and 3D PET, a...

Initial characterization of a dedicated breast PET/CT scanner during human imaging.

Published in Journal of Nuclear Medicine

Optimal treatment of renal artery in-stent restenosis: repeat stent placement versus angioplasty alone.

Published in Catheterization and Cardiovascular Interventions

Does pre-transplant in vitro detection of anti-endothelial cell antibodies predict renal allograft outcome?

Published in The Egyptian journal of immunology / Egyptian Association of Immunologists

Endothelial cells lining the vasculature proved to be the target for immune-mediated assault, conceivably through the so-called anti-endothelial cell antibodies (AECA). The aim of this work was to detect the AECAs, and to show its correlation with kidney allograft rejection and graft survival. The study included 60 patients who underwent live-donor...

Using global illumination in volume visualization of rheumatoid arthritis CT data.

Published in IEEE Computer Graphics and Applications

Proper lighting in rendering is essential for visualizing 3D objects, but most visualization software tools still employ simple lighting models. The advent of hardware-accelerated advanced lighting suggests that volume visualization can be truly usable for clinical work. Researchers studied how volume rendering incorporating global illumination imp...

Experimental procedure for the manufacture and calibration of polyacrylamide gel (PAG) for magnetic resonance imaging (M...

Published in Physics in Medicine and Biology

A simple methodology for the manufacture and calibration of polyacrylamide gel (PAG) for magnetic resonance imaging (MRI) radiation dosimetry is presented to enable individuals to undertake such work in a routine clinical environment. Samples of PAG were irradiated using a linear accelerator and imaged using a 0.5 T (22 MHz) Philips Gyroscan MRI sc...

Hiccups and bilateral carotid artery dissection.

Published in Journal of the Royal Society of Medicine

Two in one: a variant of the Stener lesion.

Published in Injury