Published in IEEE Transactions on Nuclear Science
Estimation of the tracer uptake in a region of interest (ROI) is an important task in emission tomography. ROI quantification is essential for measuring clinical factors such as tumor activity, growth rate, and the efficacy of therapeutic interventions. Accuracy of ROI quantification is significantly affected by image reconstruction algorithms. In ...
Published in Journal of Nuclear Medicine
Published in Thorax
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...
Published in Nuclear Medicine Communications
Published in Case Reports in Cardiology
Spontaneous coronary artery dissection is a rare condition, usually presenting as an acute coronary syndrome, and is often seen in states associated with high systemic estrogen levels such as pregnancy or oral contraceptive use. While topical hormonal replacement therapy may result in increased estrogen levels similar to those documented with oral ...
Published in The Journal of Rheumatology
Published in Physica Medica
Published in Medical Physics
Published in British Journal of Radiology
Published in Catheterization and Cardiovascular Interventions
Published in Journal of the Royal Society of Medicine
Published in Journal of Nuclear Medicine
Published in The Journal of invasive cardiology
Published in Physics in Medicine and Biology
Molecular probes used for in vivo optical fluorescence tomography (OFT) studies in small animals are typically chosen such that their emission spectra lie in the 680-850 nm wavelength range. This is because tissue attenuation in this spectral band is relatively low, allowing optical photons even from deep sites in tissue to reach the animal surface...
Published in Technology in Cancer Research & Treatment
Mammography has served the population of women who are at-risk for breast cancer well over the past 30 years. While mammography has undergone a number of changes as digital detector technology has advanced, other modalities such as computed tomography have experienced technological sophistication over this same time frame as well. The advent of lar...
Published in IEEE Transactions on Nuclear Science
Position-sensitive avalanche photodiodes (PSAPDs) are gaining widespread acceptance in modern PET scanner designs, and owing to their relative insensitivity to magnetic fields, especially in those that are MRI-compatible. Flood histograms in PET scanners are used to determine the crystal of annihilation photon interaction and hence, for detector ch...
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...
Published in Physica Medica
Emerging applications for positron emission tomography (PET) may require the ability to image very low activity source distributions in the body. The performance of clinical PET scanners in the regime where activity in the field of view is <1 MBq has not previously been explored. In this study, we compared the counting rate performance of two clini...
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...
