Yik-Kiong Hue

TL;DR: Simulation of logging-while-drilling tools in complex thee-dimensional borehole environments using a finite-difference time-domain (FDTD) scheme in cylindrical coordinates shows very good agreement.

TL;DR: This paper presents a complete overview of the electromagnetics (radiofrequency aspect) of MRI at low and high fields and examines the physical and technological feasibilities by which all or any of these specified electromagnetic quantities can be manipulated through techniques such as B1 shimming and signal combination using a receive array in order to advance MRI at high field strengths.

TL;DR: NMM results are compared with 3-D simulation results using finite-difference time-domain method and a pseudoanalytical approach based on Sommerfeld integrals (for problems where the latter is applicable), showing very good agreement.

TL;DR: In this article, the authors analyzed the response of logging tools with tilted coil antennas in eccentric boreholes crossing cylindrical multilayered formations (earth formations with invasion zones) by two approaches.

TL;DR: The numerical results illustrate that the B1+ field homogeneity can be greatly improved in 3D slabs that vary in orientations and sizes, in the brain, and in the entire head volume without increasing the total RF power deposition in the head to exceed that obtained with quadrature excitation.