UNLABELLED This work addresses the issue of using (18)F-FDG PET in patients with renal failure. METHODS A model analysis has been developed to compare tissue (18)F-FDG uptake in a patient who has normal renal function with uptake in a theoretic limiting case that assumes tracer plasma decay is tracer physical decay and is trapped irreversibly. RESULTS This comparison has allowed us to propo...

This paper proposes a combination of source-normalized weighted linear discriminant analysis (SN-WLDA) and short utterance variance (SUV) PLDA modelling to improve the short utterance PLDA speaker verification. As short-length utterance i-vectors vary with the speaker, session variations and phonetic content of the utterance (utterance variation), a combined approach of SN-WLDA projection and S...

The purpose of this study was to compare different kinetic and semi-quantitative methods for analysing human [18F]FP-beta-CIT studies: plasma input models, simplified (SRTM) and full (FRTM) reference tissue models, standard uptake values (SUV) and SUV ratios (SUVr). Both simulations and clinical evaluations were performed to determine the effects of noise, scan duration and blood volume on Akai...

In the years 1992 through 2001, 986 sport utility vehicle (SUV) drivers of ages 16 through 19 years were fatally injured in U.S. rollover crashes – 128 in the year 2001, the most recent year for which complete data exist in the Fatality Analysis Reporting System (FARS). In these same years, 1,345 SUV drivers of ages 20-24 sustained fatal injuries in rollovers; of these, 326 occurred in the year...

OBJECTIVE To compare two different methods for the interpretation of interim PET/CT (PET/CT-i) in lymphomas, and to establish which one best predicts a complete metabolic response (CMR) in the PET/CT study at the end of treatment (PET/CT-et). MATERIAL AND METHODS Retrospective longitudinal analysis of the PET/CT studies for staging (PET/CT-s), PET/CT-i and PET/CT-et of 65 patients, 35 Hodgkin...

Estimates for bacterial production in nearshore western Atlantic Ocean sediments were made using the frequency of dividing cell and thymidine uptake methods. The frequency of dividing cell (FDC) method resulted in estimates in the range of 5 to 50 g C m-' d-'. The thymidine uptake (THY) method resulted in estimates of 1 to .8 g C mP2 d-'. Metabolic measurements based on sediment oxygen uptake s...

UNLABELLED The purpose of this study was to measure the errors introduced by regular calibration of PET/CT scanners and to minimize the effect of calibration error on standardized uptake value measurements. METHODS Global calibration factors from 2 PET/CT scanners were recorded for 3.5 and 1.8 y, comparing manufacturer-recommended protocols with modified protocols to evaluate error contributi...

This study examines geographical variations in the level of naturally occurring Pb-supported Po in permanent teeth of juveniles in the UK. Permanent teeth extracted from 278 juveniles for orthodontic purposes were obtained from 48 counties in the UK. Po activity concentration was measured on the outer enamel surface using TASTRAK α-particle sensitive plastic track detectors. Po levels in teeth ...

Objectives. To determine the prevalence of incidentalomas in a patient population with no known thyroid malignancy who underwent whole body FDG-PET/CT for staging or restaging of neoplasia. The additional aim of the study was to evaluate the feasibility of using PETCT as a screening tool for malignant thyroid incidentalomas. Methods. Retrospective review of medical records of all the thyroid ex...