In this paper we present an Earth magnetic field measurement system and an automated acquisition setup to characterize it. The measurement system consists of a fluxgate sensor and an integrated front-end circuit, both realized in CMOS technology. The couple of orthogonal axes of the sensor makes the system suitable for realizing an electronic compass device. Indeed, we can measure not only the ...

Introduction The transmit efficiency and receive signal-to-noise ratio (SNR) of transceive RF coils depends on how well the resonance circuit is tuned to the Larmor frequency and matched to the 50 ohm coaxial cable. Patient size variability changes the load the coil couples with and adversely impacts both tuning and matching, and subsequently the power efficiency and SNR of the coil. The loadin...

OBJECTIVE To study the therapeutic effect of endovascular treatment for intradural hemorrhage from ruptured spontaneous vertebral artery dissections (SVAD) using Guglielmi detachable coils and mechanical coils. METHODS The retrospective study was carried out in the Department of Interventional Radiology, Rizhao People`s Hospital, Rizhao, China from January 2008 to December 2011. Twelve patien...

BACKGROUND AND PURPOSE The purpose of this study was to determine whether implanting exogenous fibroblasts on platinum coils could enhance intra-aneurysmal fibrosis. Hypotheses included: (1) fibroblast-coated (FBC) platinum coils can improve angiographic results after embolization; and (2) FBC platinum coils can accelerate histological healing of embolized aneurysms. METHODS Experimental aneu...