Browsing by Keywords "Radiofrequency"
Now showing items 1-5 of 5
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Approximate fourier domain expression for bloch-siegert shift
(John Wiley and Sons Inc., 2015)Purpose: In this study, a newsimple Fourier domain-based analytical expression for the Bloch-Siegert (BS) shift-based B1 mapping method is proposed to obtain |B1+| more accurately while using short BS pulse durations and ... -
Simultaneous radiofrequency (RF) heating and magnetic resonance (MR) thermal mapping using an intravascular MR imaging/RF heating system
(John Wiley & Sons, 2005-06)Previous studies have confirmed the possibility of using an intravascular MR imaging guidewire (MRIG) as a heating source to enhance vascular gene transfection/expression. This motivated us to develop a new intravascular ... -
Specific absorption rate reduction using nonlinear gradient fields
(Wiley, 2013)The specific absorption rate is used as one of the main safety parameters in magnetic resonance imaging. The performance of imaging sequences is frequently hampered by the limitations imposed on the specific absorption ... -
Superconductivity in high-frequency fields
(Overseas Publishers Association, 1998-01-15)Fundamentals of BCS and GLAG theories of superconductivity are reviewed with a focus on high.;,frequency properties of bulk superconductors, superconducting films and superconducting cavities. Superconductivity as a ... -
Theory of Q-degradation and nonlinear effects in Nb-coated superconducting cavities
(Gordon and Breach - Harwood Academic, 1998)Amplitude-dependent absorption of RF power in superconducting cavity with a wall of normal metal (Cu ) covered by a film of superconductor (Nb ) is determined by three factors: (1)depairing effect of high-current density ...
