Results: The mean acceleration achieved with dual-source parallel RF excitation was 36% (range,
18%-50%). The total imaging duration of a three-station JNJ-26481585 clinical trial total spinal examination was reduced by one-third by using dual-source parallel RF transmission. For all cases investigated, diagnostic image quality without significant differences between the two methods and with a good interobserver agreement was achieved (Kendall tau-b, 0.50-0.84). The observed image contrast changes were predominantly small (<0.10 in 15 of 24 CRs), though they were significantly different (P < .05).
Conclusion: While shortening examination times by approximately one-third, the dual-source parallel RF transmission mode in MR imaging of the spine yielded diagnostic image quality comparable to that with the conventional single-source RF transmission mode. (C)RSNA, 2010″
“In connection with
fast heating in a laser produced plasma (LPP) extreme ultraviolet (EUV) source, the superheating behavior of bulk tin (Sn) at high heating rates is investigated. A constant temperature and pressure molecular dynamics simulation using modified Lennard-Jones and Coulomb potentials suitable for studying the liquid structure of Sn is employed in order to derive the caloric curves of the solid and liquid phases. The results have shown transient effects on the phase transitions. Superheating is observed during the melting and vaporizing processes. The velocity distribution of Sn particles against typical laser fluence in a LPP EUV light source has been numerically find more investigated using a simplified method including a one-dimensional, two-temperature, molecular dynamics, and steady-state ionization model. In the framework of our model, it was found that ejected Sn particles have a maximum velocity on the order of 10 to 40 km/s in plasma created using a nanosecond pre-pulse neodymium-doped yttrium aluminum garnet (Nd:YAG, 1.06 mu m) laser in EUV lithography experiments. (C) 2011 American Institute of Physics. [doi:10.1063/1.3601346]“
“Purpose: To assess the association between trochanteric surface irregularities selective HDAC inhibitors seen on
conventional radiographs and magnetic resonance (MR) evidence of abductor tendon abnormalities.
Materials and Methods: A total of 150 consecutive patients were evaluated in this retrospective study (age range, 21-88 years; mean age, 58.7 years +/- 16.1 [standard deviation]; 57 men, 93 women). Because patients’ rights are protected by a procedure in which they are asked to provide general approval for their records and images to be reviewed for scientifi c purposes, specifi c approval by the institutional review board was not required. Two readers independently analyzed conventional radiographs and MR images of the hip. Trochanteric surface was graded on conventional radiographs as normal, osseous irregularities extending 1- 2 mm, or osseous irregularities extending more than 2 mm.