Introduction: Head motion while imaging stroke is often observed during acquisition of spatio-temporal data like perfusion-weighted imaging (PWI). In stroke data analysis, retrospective motion correction is the norm due to acquisition time-constraints, while symmetry correction (SC) is used frequently for contralateral analysis. Previously it was demonstrated that the motion correction (MC) sch...

The spliceosomal RNA helicase Brr2 is required for the assembly of a catalytically active spliceosome on a messenger RNA precursor. Brr2 exhibits an unusual organization with tandem helicase units, each comprising dual RecA-like domains and a Sec63 homology unit, preceded by a more than 400-residue N-terminal helicase-associated region. Whereas recent crystal structures have provided insights i...

BACKGROUND AND PURPOSE In acute stroke with proximal artery occlusion, FLAIR vascular hyperintensities observed beyond the boundaries of the cortical lesion on DWI (newly defined "FLAIR vascular hyperintensity-DWI mismatch") may be a marker of tissue at risk of infarction. Our aim was to compare the occurrence of FLAIR vascular hyperintensity-DWI mismatch relative to that of perfusion-weighted ...

In recent years, research in narrow-band digital speech coding has achieved good quality speech coders at low rates of 4.8 to 8.0 kb/s. This thesis examines the method proposed by W.B. Kleijn called prototype waveform interpolation (PWI) for coding the voiced sections of speech efficiently to achieve a coder below 4.8 kb/s while maintaining, even improving, the perceptual quality of current cod...

The idea that picture-word interference (PWI) and the Stroop effect are two manifestations of the same process has been widely accepted. However, recently Dell’Acqua and colleagues (2007) have questioned the identical nature of the Stroop effect and picture-word interference, based on the observation that the loci of both effects in the mental processing stream differ. In this paper, we will pr...

BACKGROUND AND PURPOSE It is hypothesized that early diffusion-weighted imaging (DWI) lesions accurately estimate the size of the irreversibly injured core and thresholded perfusion-weighted imaging (PWI) lesions (time to maximum of tissue residue function [Tmax] >6 seconds) approximate the volume of critically hypoperfused tissue. With incomplete reperfusion, the union of baseline DWI and post...