Diffusion-weighted imaging (DWI) is a sophisticated magnetic resonance imaging (MRI) technique with rapid acquisition time and high sensitivity for depicting acute cerebral ischemia. It is currently part of the routine workup in most medical centers when ischemic stroke is in the differential diagnosis. DWI helps establish a diagnosis of acute ischemic infarct even in cases where the clinical presentation is not typical for ischemic stroke. However, contrary to popular belief, not every hyperintensity on DWI is an ischemic stroke. Consequently, DWI with high intensity signals, commonly called "positive" DWI, is sometimes misinterpreted and leads to incorrect medical management. In this report, we briefly discuss some of the essential, technical aspects of DWI and report various clinical scenarios, which may lead to "positive" DWI findings but are not ischemic strokes. Although the sensitivity of DWI for ischemic stroke is very high, the specificity is not as high, and a "positive" DWI does not exclude other diagnoses that should be considered based on each patient's clinical history and examination, and the appearance of other sequences of MRI scans.
We calculate explicitly the constant factor $C$ in the
Large $N$ asymptotics of the partition function $Z_N$ of the six-vertex model
With domain wall boundary conditions on the critical line between the
Disordered and ferroelectric phases. On the critical line the weights $a,b,c$
Of the model are pa...
We perform hydrodynamical simulations of a young galactic disc embedded in a
Hot gaseous halo using parameters typical for Lyman break galaxies (LBGs). We
Take into account the (static) gravitational potentials due to a dark matter
Halo, a stellar bulge and a disc of stars and gas. Star formation is...
Incorporate the KLD measure into the resampling in which the distribution of
Interest is just the posterior distribution. That is to say, for sample size
Adjustment, it is more theoretically rigorous and practically flexible to
Measure the fit of the distribution represented by weighted particles...
Pubget Updates sends you emails when Pubget finds new papers that match your search. Use Pubget Updates to get the latest articles for your specialty, written by a colleague, or published by your favorite journals.