Results: For the 2D and 3D techniques, the mean SI index and SI ratios were significantly different between C59 wnt adenomas and nonadenomas (P<.05), except for the adrenal-to-liver SI ratio with the 2D technique and the adrenal-to-muscle SI ratio with both techniques. For all evaluation methods, the AUCs were higher, although not statistically significant, for the 3D technique. The two techniques exploited different suggested thresholds for discriminating adenomas

from nonadenomas.

Conclusion: Adrenal adenomas can be readily differentiated from nonadenomas at 3-T MR imaging with either a 2D or 3D single-breath-hold dual GRE MR technique. Depending on the acquisition technique, different suggested thresholds need to be selected for various evaluation methods. (C) RSNA, 2010″
“Magnetization thermal switching dynamics under radio frequency (rf) excitations selleckchem are studied based upon optimal reversal path and logarithmic susceptibility concepts. We characterize thermal magnetization switching under both rf magnetic field and spin torque excitations. For rf magnetic field induced thermal switching, magnetization thermal stability barrier

dependence upon rf frequency is compared to zero temperature magnetization dynamic coercivity dependence upon rf frequency. The maximum thermal reversal barrier reduction happens near linearized small angle magnetization resonant frequency, quite different from zero temperature coercivity frequency Sonidegib response. For magnetic elements excited by rf spin torque current, we study adiabatic and nonadiabatic spin torque effects on thermal stability barrier frequency dependence. For cylindrical symmetric case, nonadiabatic term does not affect

thermal reversal barrier reduction to leading order. For thin film element without cylindrical symmetry, nonadiabatic term affects frequency response of normalized logarithmic susceptibility significantly only when its magnitude is comparable to that of the adiabatic spin torque term. (C) 2010 American Institute of Physics. [doi:10.1063/1.3501043]“
“Purpose: To assess the feasibility and accuracy of a synthetic-echo time (TE) magnetic resonance (MR) postprocessing technique for the diagnostic evaluation of abnormalities of menisci and articular cartilage in the knee.

Materials and Methods: This study was approved by the institutional review board. Twenty-four patients (three women, 21 men; mean age, 44.8 years) gave informed written consent to prospectively undergo evaluation of their knees (10 left and 14 right knees) with standard sagittal intermediate-weighted (repetition time msec/TE msec, 2200/17) and fat-saturated T2-weighted (3600/88) fast spin-echo sequences. In addition, sagittal multiecho fast gradient-echo sequences were performed for the generation of synthetic-TE images with variable T2- or T2*-weighted contrast by using a newly developed synthetic-TE analysis tool that was incorporated directly into the picture archiving and communication system.