How does MRI work?: An Introduction to the Physics and Function of Magnetic Resonance Imaging
Springer Science & Business Media, 2003 - Science - 138 pages
This concise account of the physics and functioning of magnetic resonance imaging (MRI) is aimed at everyone who wishes to work with MRI and who seeks an easily understandable introduction to the workings of this somewhat complex technique. The reader is presented with a condensed, yet clearly structured overview of the basics of MRI. Special emphasis is placed on the demands of its everyday clinical routine application. The opening chapters introduce the basics of MR function and the MR sequences most widely applied for clinical routines. There follow discussions of the basics of parallel imaging and of techniques to image the arterial and venous systems. The book is rounded off by chapters on MR artefacts, MR contrast media, and safety concerns for MRI. Book jacket.
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achieve angiography arterial cause chemical shift clinical consequently contrast media Decreases dephasing echo train Echo-Planar Sequence effect emit employed excitation external magnetic field fast spin-echo sequences ferromagnetic field inhomogeneities field of view flip angle flow fractional-echo frequency encoding frequency gradient gadolinium gradient coils gradient-echo sequences image acquisition image contrast increase influence investigated K-lines K-space Larmor frequency longitudinal magnetisation magnetic field BQ magnetic field strength magnetic moment magnetic resonance imaging matrix medium number of measurements paramagnetic patients phase direction phase encoding phase encoding direction phase gradient phase shift pixel possible precession presaturation proton density protons pulse sequence receiver coil reduce relaxation repetition time TR RF pulse saturation scanner sensitive short repetition signal intensity signal-to-noise ratio slice thickness Spatial Encoding spatial resolution specific contrast media superparamagnetic switched T2-contrast T2-weighted images tion tissue Tl-relaxation TOF technique transverse magnetisation utilised vascular vector velocity voxel XY-plane Y-gradient Z-direction