UNLABELLED We prospectively investigated the ideal imaging time to measure vascular uptake after injection of (18)F-FDG. METHODS A total of 17 patients with atherosclerotic abdominal aortic aneurysm underwent dynamic abdominal PET/CT using 2-min frames between 45 and 53, 57 and 65, 115 and 123, and 175 and 183 min after injection of (18)F-FDG. For each period of dynamic imaging, vessel wall a...

The most elementary statistical test is the paired samples t-test with just two pairs. Here the data set to be analysed consists of two numbers (the two paired differences), and the statistical test examines whether the population mean is zero. This test can be derived in a surprisingly fast and intuitive manner by plotting one number against the other on a piece of graph paper, then joining th...

We compared the performance of the T-SPOT.TB assay with blood used within 0 to 3.5 h after collection (control) to its performance with blood stored for 0 to 3.5, 5 to 8, 18 to 21, or 31 to 33 h with the addition of T-Cell Xtend (experimental), using samples from 154 participants. The 95.4% concordance between paired specimens indicated that blood can be stored for up to 33 h prior to T-SPOT.TB...

p s t m w t n p a g e r t A procedure to calculate probability limits for the inference that the absence of a taxon from a woodrat (Neotoma) midden implies bsence from the paleolandscape uses paired samples of modern egetation communities and paired samples of paleocommunities. ssumptions are: (1) each member of a sample pair is an indeendent measure of the same vegetation assemblage; (2) behav...

In this paper, we present an experiment in which human subjects were asked to manually excite a virtual sprung mass into resonance under various feedback conditions: visual, haptic or visual and haptic combined. We are interested in comparing the value of these feedback conditions in terms of their influence on the achievable performance in a dynamic task such as exciting a resonant mechanical ...

OBJECTIVE To examine, for polio survivors, whether walking with a carbon-fibre reinforced plastic knee-ankle-foot orthosis (carbon KAFO) is more efficient than walking with an ordinary KAFO or without an orthosis. DESIGN Consecutive sample. SETTING Post-polio clinic, University Hospital of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan. PARTICIPANTS Eleven polio survivo...

Appropriate statistical analyses are an integral part of surgical research. The purpose of this work is to assist surgeons and clinicians with the interpretation of statistics by providing a general understanding of the basic concepts that lead to choosing an appropriate statistical test for common study designs. It is extremely important to understand the nature of the data before embarking on...

Although immunosuppression has long been recognized in Hodgkin lymphoma (HL), the underlying basis for the lack of an effective immune response against the tumor remains unclear. The aim was to test our hypothesis that regulatory T cells dominate involved lymph nodes. The approach was to assay CD4+ T-cell function in HL-infiltrating lymphocytes (HLILs) and paired peripheral blood mononuclear ce...

Abstract The multivariate normal and the multivariate t distributions belong to the most widely used multivariate distributions in statistics, quantitative risk management, and insurance. In contrast to the multivariate normal distribution, the parameterization of the multivariate t distribution does not correspond to its moments. This, paired with a non-standard implementation in the R package...