BACKGROUND AND PURPOSE Salivary duct carcinoma (SDC) is regarded as a high-grade malignancy in the current classification of salivary gland neoplasms. The aim of our study was to describe the MR imaging features of SDC. METHODS Nine patients with SDC underwent MR imaging study. The apparent diffusion coefficient (ADC) values of SDCs were measured from diffusion-weighted images. Time-signal in...

This paper proposes a new method for image enhancement by incorporating the concept of guided image filter and wavelet based edge detection. Guided image filter is a spatial domain filter performs the filtering by considering the content of the guidance image, which can be the input image itself or another different image. Guided image filter has no gradient distortion and better performance ne...

The quantum efficiency enhancement in nanocrystal solids is critically important for their efficient use as luminophors on color-conversion light emitting diodes LEDs . For this purpose, we investigate energy gradient mixture of nanocrystal solids for recycling their trapped excitons by varying their donor-acceptor nanocrystal ratios and study the resulting quantum efficiency enhancement as a f...

nitration of phenol and various 4-substituted phenols with cu(no3)2.3h2o, cu(no3)2.3h2o/sio2, 9h2o and cr(no3)2. 9h2o in different anhydrous organic solvents are investigated. high selectivity ratio of para vs ortho isomers has been observed. mono- and dinitro compounds from phenol and 4-substituted phenols by choosing the proper solvents and reaction conditions, are also obtained with high sel...

We describe an inclusive search for avor changing neutral current decays of the type b!s gluon in the SLD experiment. Models of b!sg indicate that the production of high momentum kaons is enhanced over background from standard B decays. If the branching ratio for b!sg is 10, then such an enhancement should have a goodsignal to background ratio. The analysis makes use of the particle identiicati...

BACKGROUND AND PURPOSE High-resolution MR imaging can depict intracranial arterial atherosclerotic plaques. Our aim was to evaluate the relationship between the degree of enhancement of MCA plaques on contrast-enhanced high-resolution MR imaging and ischemic stroke and stenosis severity. MATERIALS AND METHODS This study enrolled 36 patients diagnosed with moderate-to-severe atherosclerotic MC...

Flow exiting a convergent-divergent nozzle operated at o -design conditions exhibits an instability that causes mixing enhancement in the ow itself and can destabilize an adjacent ow. The latter property enables mixing enhancement of an arbitrary jet via parallel injection of a secondary gas ow. In this study we investigated the e ect of mixing enhancement using secondary parallel injection (ME...