BACKGROUND AND PURPOSE We sought to investigate the relation between collateral flow via different pathways and hemodynamic parameters measured by dynamic susceptibility contrast-enhanced MRI in patients with severe carotid artery disease. METHODS Dynamic susceptibility contrast-enhanced MRI was performed in 66 patients and 33 control subjects. Patients had severe stenosis (>70%, n=12), unila...

68Ga-labeled octreotide analogs, including DOTATOC, DOTATATE and DOTANOC, are very useful PET radiopharmaceuticals in the management of neuroendocrine tumors (NETs). However, a considerable number of malignancies beyond NETs, including lymphomas, express somatostatin receptors and are eligible to accumulate radiolabeled octreotide analogs, leading to misleading findings on somatostatin receptor...

when the a/s are complex constants. The case of real a/s has already been adequately treated by Gauss, Lucas, Jensen, and Bôcher in connection with their study of the derivative of a polynomial and the jacobian of two binary forms. In terms of $, their results may be stated as follows. (a) If all the ay's have the same sign, there are no zeros of $ outside of any convex polygon enclosing the po...

Optical modeling suggests that levels of retinal defocus routinely caused by presbyopia should produce phase reversals (spurious resolution−SR) for spatial frequencies in the 2 cycles/letter range known to be critical for reading. Simulations show that such reversals can have a decisive impact on character legibility, and that correcting only this feature of defocused images (by re-reversing co...

Road sign detection is an important for regulating the traffic. In this paper oversegmentation technique is used for the detection and recognition of a road sign with the integration of shape analysis. The main focus is on the implementation and efficiency aspect of this technique. There is a detailed analysis of oversegmentation has been shown. This proposed algorithm can be used as a part of ...

Depth perception in strabismus SIR, Recently Henson and Williams published an article entitled 'Depth perception in strabismus." Regettably, the authors did not review the literature completely. If they had, they would have noted that Cooper and Warshowsky2 scientifically evaluated monocular cues in the Titmus stereo test, and that Cooper and Feldman36 looked at the availability of monocular cu...

A signed graph is a graph where each edge is labeled as either positive or negative. A circle is positive if the product of edge labels is positive. The frustration index is the least number of edges that need to be removed so that every remaining circle is positive. The maximum frustration of a graph is the maximum frustration index over all possible sign labellings. We prove two results about...

Hydrodynamic simulations of the merger of stellar mass black hole-neutron star binaries are compared with mergers of binary neutron stars. The simulations are Newtonian but take into account the emission and back-reaction of gravitational waves. The use of a physical nuclear equation of state allows us to include the effects of neutrino emission. For low neutron star-to-black hole mass ratios, ...