Real-time cardiac and coronary MRI at 1.5T is relatively "signal starved" and the 3T platform is attractive for its immediate factor of two increase in magnetization. Cardiac imaging at 3T, however, is both subtly and significantly different from imaging at 1.5T because of increased susceptibility artifacts, differences in tissue relaxation, and RF homogeneity issues. New RF excitation and puls...

MR imaging at high B0 field strength presents significant diagnostic opportunities derived from enhancements in SNR, spectral resolution and image contrast. However there are technical challenges that substantially hamper the practice of high-field MRI, including a major one that is related to the exploitation of the radio frequency EM field (B1 field and concomitant E field). As field strength...

Aluminum doped zinc oxide (ZnO:Al) thin films with high conductivity, resistance to ion irradiation, high transparency in the visible range and moderate costs will be one of the most promising candidates for the present predominant transparent conducting materials. However, there are still some problems such as long preparation cycle and high surface resistance. In this paper, adding a certain ...

ing certain features of physical measurement, we have examined those conjoint structures in which there are non-trivial factorizable automorphisms. One important result is the fact that (0, q> is a factorizable automorphism iff Q = n’&r-’ where n and rr’ are solutions of the structure mapping the first component onto the second and 8 is an isomorphism between induced structures (Theorem 8). It ...

Introduction An important application of compact MRI is the measurement of trabecular bone volume fraction (TBVF) in peripheral bones for diagnosis of osteoporosis [1,2]. We reported a compact MRI system for TBVF measurement of the calcaneus and demonstrated its usefulness by discovering the age dependence of the relaxation times of the bone marrow protons [3]. However, there are still several ...

Radiofrequency (RF) field (B 1) inhomogeneity due to shortened wavelength at high field is a major cause of magnetic resonance imaging (MRI) nonuniformity in high dielectric biological samples (e.g., human body). In this work, we propose a method to improve the B 1 and MRI homogeneity by using pre-emphasized non-uniform B 1 distribution. The intrinsic B 1 distribution that could be generated by...

in  this  study  we  determined  the  frequency,  sensitivity  and  specificity  of  anti  cyclic citrullinated peptides (anti-ccp) igg antibody, total rheumatoid factor (rf-t), and rf isotypes in iranian patients with rheumatoid arthritis (ra) and their association with age, clinical and serological parameters. anti-ccp and rf-t and rf isotypes level were measured in 418 patients and 399 healt...