OBJECTIVE This study investigates the application of a modified reversed gradient algorithm to the Propeller-EPI imaging method (periodically rotated overlapping parallel lines with enhanced reconstruction based on echo-planar imaging readout) for corrections of geometric distortions due to the EPI readout. MATERIALS AND METHODS Propeller-EPI acquisition was executed with 360-degree rotationa...

The dominant feature in the acoustic spectrum of a propeller-driven aircraft is the spectral line corresponding to the propeller blade rate that is equal to the product of the propeller shaft rotation rate and the number of blades on the propeller. The frequency of this line, when measured by a stationary observer on the ground, changes with time due to the acoustical Doppler effect. In this pa...

A non-linear mathematical model, for the roll-yaw behaviour of a ship, is used to predict the prevention of capsize of a small ship. The problem was simulated using the digital package SIMULINK. Simulated responses of the ship with simple hydrodynamic fin stabilisers show that capsize could have been prevented by this means in waves up to 7 m in height. Active control using a simple full span c...

PROPELLER MRI (periodically rotated overlapping parallel lines with enhanced reconstruction) provides images with significantly fewer B(0)-related artifacts than echo-planar imaging (EPI), as well as reduced sensitivity to motion compared to conventional multiple-shot fast spin-echo (FSE). However, the minimum imaging time in PROPELLER is markedly longer than in EPI and 50% longer than in conve...

The extracellular portions of cell surface receptor proteins are often comprised of independently folding protein domains. As they are translated into the endoplasmic reticulum (ER), some of these domains require protein chaperones to assist in their folding. Members of the low-density lipoprotein receptor (LDLR) family require the chaperone called Boca in Drosophila or its ortholog, Mesoderm d...

BACKGROUND The practice of tattooing and piercing has expanded in western society. In order to verify young adults' knowledge of the risk and practices related to body art, an investigation was conducted among freshmen of the University of Bari in the region of Apulia, Italy. METHODS The study was carried out in the Academic Year 2009-2010 through an anonymous self-administered written questi...

Abstract Background In the last decades, body art practices such as tattooing and piercing have known an increasing popularity, mainly in young people. These procedures are associated with infectious non-infectious health risks. The aim of this multicenter study was to evaluate knowledge risks related among undergraduate students from ten Italian universities. Methods A cross-sectional performe...

J. Deng, A. Stemmer, F. H. Miller, T. K. Rhee, R. Salem, D. Li, R. A. Omary, A. C. Larson Department of Radiology, Northwestern University, Chicago, IL, United States, Department of Biomedical Engineering, Northwestern University, Chicago, IL, United States, Siemens Medical Solutions, Erlangen, Germany Introduction: Diffusion-weighted imaging (DWI) techniques use water mobility as an exogenous ...