Magnetic resonance imaging (MRI) is a very powerful tool for diagnostic imaging; however, it is very seldom used for guiding interventional procedures. On the other hand, in many procedures the quality of the guiding image modality is less than perfect, and therefore, MRI can be considered as an alternative. Among these interventional procedures, the percutaneous cardiovascular procedures have ...

A review of the theory, technology, and practice of RF coils for small-animal MRI is presented that includes a brief overview of MR S/N analysis and discussions of the various coils commonly used in small-animal MR – surface coils, linear volume coils, birdcages, and their derivatives. The scope is limited to mid-range coils – coils where the product (fd) of the frequency f and the coil diamete...

Appropriately sized 0.010- and 0.018-inch complex framing coils were placed in a wide-necked silicone aneurysm replica, and their stability was evaluated at variable physiologic flow rates using video recording. After detachment, the 0.010-inch coils demonstrated instability/prolapse that was proportional to flow rate. In contrast, 0.018-inch coils held their 3D configuration regardless of flow...

BACKGROUND AND PURPOSE To assess safety and efficacy data of a new bioactive coil (Cerecyte) which is loaded with polyglycolic acid on the inside of the coil. METHODS Fifty-four patients harboring 55 aneurysms were treated with Cerecyte coils. These aneurysms were matched in localization and size with aneurysms treated with bare platinum coils. RESULTS Periprocedural complications and handl...

The economic cost of roll refurbishment in the steel-making industry is considerable. In a cold rolling mill, wear and damage rolls disrupt industrial environment, so it critical to predict remaining useful life early change without causing disruption manufacturing process. However, since complex process affected by multiple variables which are operated adverse conditions, very challenging math...

When the transmitting and receiving coils are equivalent with or not significantly smaller than their separation distance between the two coils, the results of numerical simulations for transfer efficiency of system show that the maximum coupling of two coils or maximum transfer efficiency occur with a certain tilt angle between two coils, which means the two coils with parallel on the same axi...

INTRODUCTION Shielded RF coils have been investigated since the earliest days of MRI, taking the form of the “Zabel coil” [1] a shielded transmission line coil, coils over ground planes, and more recently microstrip coils, particularly for use at high-fields [2]. Some authors have stated that RF shields are essential for 7T surface coils over 10 cm in diameter [3], and others have successfully ...

This paper deals with an efficient and fast approach for determining the mutual inductance between thin current loops (filamentary coils, thin cylindrical coils, thin disk coils and all possible combinations). This approach is based on the filament method where conductors are approximated by a set of Maxwell’s coils. The resulting equations are expressed in term of the complete elliptical integ...

Annealed hypoeutectoid ASTM A510/A853 steel wire is widely used in the construction industry due to its mechanical properties, which makes it a very versatile material work with. This concerns prediction of thickness scale layer once subjected batch annealing process. We propose mathematical model approach oxidation occurring during The treats this phenomenon as non-isothermic instance; takes i...