منابع مشابه
A 16-channel Arterial Spin Labeling - Head Transceiver Array Combination for 7 Tesla
Target Audience: RF Engineers, UHF Labs, Researchers interested in pTX, TOF and ASL Purpose The aim of this work was to develop a 7 Tesla Arterial Spin Labeling (ASL) [1,2] transceiver coil array capable of being used as a stand-alone array [3,4] or in combination with an additional transceiver head array [5]. The transceiver design is potentially beneficial at 7T since it allows for Radio Freq...
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Introduction Magnetic Resonance Imaging (MRI) has become a very important technique for the diagnosis of breast diseases. A dedicated radio frequency (RF) coil, capable of inducing a homogeneous magnetic field within a defined region of interest as well as receiving MRI signals with a high signal to noise ratio (SNR), is essential for high spatial resolution breast imaging. Close-fitting phased...
متن کاملNew expandable hydrogel-platinum coil hybrid device for aneurysm embolization.
This study introduces a new, hybrid embolic device that in addition to offering all the important attributes of existing detachable platinum coils also shows an enhanced ability to fill aneurysm cavities. The device consists of a carrier platinum coil coupled to an expandable hydrogel material, which undergoes a ninefold increase in volume when placed into a physiological environment. Distinct ...
متن کاملHybrid TEM/Loop Coil Array for Parallel High Field MRI
Introduction As B0 field strengths increase, there is an almost linear increase in SNR. However, new problems arise at higher field strengths, such as a higher SAR and B1-field inhomogeneity. To counteract these problems, multiple transmit channels are necessary to improve the image homogeneity, this can be achieved with static RF-shimming [1]. In this work, a new transceive surface coil array ...
متن کاملA Hybrid Algorithm using Firefly, Genetic, and Local Search Algorithms
In this paper, a hybrid multi-objective algorithm consisting of features of genetic and firefly algorithms is presented. The algorithm starts with a set of fireflies (particles) that are randomly distributed in the solution space; these particles converge to the optimal solution of the problem during the evolutionary stages. Then, a local search plan is presented and implemented for searching s...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2016
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(16)30097-4