In this work, we propose and investigate a volume coil array design method using different types of birdcage coils for MR imaging. Unlike the conventional radiofrequency (RF) coil arrays of which the array elements are surface coils, the proposed volume coil array consists of a set of independent volume coils including a conventional birdcage coil, a transverse birdcage coil, and a helix birdca...

Undesirable detachment or stretching of coils within the parent artery during aneurysm embolization can be related with thrombus formation, which can be caused occlusion of parent artery or embolic event(s). To escape from this situation, several rescue methods have been reported. A case with undesirably stretched coil in which another rescue method was used, is presented. When the stretched co...

Wireless power transmission technology based on coil coupling has been widely applied in various fields. However, the performance of system is affected by malposition coil-couple, which inevitable wireless (WPTS). In this study, a multi-transmitter array proposed to build more uniform magnetic flux density for WPTS, intending enhance WPTS case coil-couple malposition. The model built and differ...

Three-coil inductive power transfer (IPT) charging system can not only achieve inherent constant current (CC) to voltage (CV) transition but also tolerate load open-circuit. However, due the cross-coupling between auxiliary coil and receiver coil, output in CV mode may deviate from significantly, which makes design freedom of three-coil coupler low. By replacing with a transformer, an improved ...

gap resonator coil; B) a loop-gap resonator implantable coil coated with PDMS; and C) a surface coil. Each coil contains two tuning capacitors and a decoupling circuit that includes a hand-wound inductor and Schottky anti-parallel diodes. Development of a Receive-Only Inductively-Coupled RF Coil System to Enhance H NMR Localized Spectroscopy to Monitor an Implantable Bioartificial Construct at ...

The investigation on the constant current (CC)/constant voltage (CV) charging for electric vehicle wireless power transfer (WPT) system has been widely conducted. However, CC/CV performance under misalignment cases scarcely studied especially multi-coil WPT system. resonant tank compensation methodology exciter-quadrature-repeaters (EQR) transmitter-based is to achieve high factor with low leak...

Introduction Before we embark on the topic of array coils designs, the reader is referred to a historic paper by Hoult [1] that provides a detailed overview and discussion on the NMR receiver. Most of today’s RF receive coil designs are based upon the phased array coil technology proposed by Roemer et al. in 1990 [2], and its application to volume imaging was discussed by Hayes et al. in 1991 [...

OBJECTIVES The purpose of this study was to compare defibrillation thresholds with lead systems consisting of an active left pectoral electrode and either single or dual transvenous coils. BACKGROUND Lead systems that include an active pectoral pulse generator reduce defibrillation thresholds and permit transvenous defibrillation in nearly all patients. A further improvement in defibrillation...