T
Tamer S. Ibrahim
Researcher at University of Pittsburgh
Publications - 85
Citations - 2137
Tamer S. Ibrahim is an academic researcher from University of Pittsburgh. The author has contributed to research in topics: Electromagnetic coil & Radiofrequency coil. The author has an hindex of 24, co-authored 85 publications receiving 1946 citations. Previous affiliations of Tamer S. Ibrahim include Ohio State University & University of Oklahoma.
Papers
More filters
Journal ArticleDOI
Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator.
Tamer S. Ibrahim,Robert J. Lee,Brian A. Baertlein,Amir M. Abduljalil,Hui Zhu,Pierre-Marie Robitaille +5 more
TL;DR: The results show that significant improvement in the circularly polarized component of the transverse magnetic field could be obtained when using multiple ports andVariable phase and fixed magnitude, or variable phase and variable magnitude excitations.
Journal ArticleDOI
Dielectric resonances and B(1) field inhomogeneity in UHFMRI: computational analysis and experimental findings.
Tamer S. Ibrahim,Robert J. Lee,Amir M. Abduljalil,Brian A. Baertlein,Pierre-Marie Robitaille +4 more
TL;DR: It is concluded that in clinical UFHMRI, the most important determinants of B(1) field homogeneity consist of 1) the RF Coil design, 2) the interaction between the RF coil, the excitation source and the sample, and finally 3) the geometry and electrical properties of the sample.
Journal ArticleDOI
Application of finite difference time domain method for the design of birdcage RF head coils using multi-port excitations.
TL;DR: A three-dimensional finite difference time domain model was developed where the high pass birdcage coil and the imaged object are analysed as a single unit, and driving the coil in four ports provides an SAR distribution with peak values that are significantly less than those with linear or quadrature excitations.
Journal ArticleDOI
Dielectric resonance phenomena in ultra high field MRI.
Allahyar Kangarlu,Brian A. Baertlein,R. Lee,Tamer S. Ibrahim,Lining Yang,Amir M. Abduljalil,Pierre-Marie Robitaille +6 more
TL;DR: Theoretical results demonstrate that distilled water can sustain dielectric resonances in head-sized spheres near 200 and 360 MHz, but the presence of significant conductivity suppresses these resonances.
Journal ArticleDOI
Computational analysis of the high pass birdcage resonator: finite difference time domain simulations for high-field MRI.
TL;DR: In this work, a finite difference time domain (FDTD) algorithm is validated at 1.5 tesla using the standard GE Signa quadrature head coil and a muscle phantom and a thorough description of both B(1) fields and RF radiation is provided.