Download Magnetic Resonance Imaging of the Brain and Spine (2 Volume by Scott W. Atlas PDF

By Scott W. Atlas

Established because the best textbook on imaging prognosis of mind and backbone problems, Magnetic Resonance Imaging of the mind and backbone is now in its Fourth version. This completely up to date two-volume reference promises state-of-the-art info on approximately each element of medical neuroradiology. professional neuroradiologists, cutting edge popular MRI physicists, and skilled prime medical neurospecialists from worldwide convey easy methods to generate cutting-edge photos and outline diagnoses from an important clinical/pathologic MR imaging correlations for neurologic, neurosurgical, and psychiatric illnesses spanning fetal CNS anomalies to issues of the getting older mind. Highlights of this version contain over 6,800 photos of outstanding caliber, extra colour pictures, and new info utilizing complicated thoughts, together with perfusion and diffusion MRI and useful MRI. A significant other web site will supply the absolutely searchable textual content and a picture financial institution.

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Extra resources for Magnetic Resonance Imaging of the Brain and Spine (2 Volume Set)

Sample text

The linear spatial resolution for MRI is proportional to the cube root of the SNR, and thus the resolution of MRI using isotropic voxels varies more slowly than the SNR with increasing field strength. 5-T scanners, one is struck by the remarkable increase in anatomic detail that is visible. Although the increase in available SNR noted earlier plays a role, several other factors are also involved. Tissues generally differ slightly in chemical shift and diamagnetic susceptibility as well as in T1 and T2 relaxation times.

As long as precautions are taken to avoid the presence of ferromagnetic foreign bodies, excessive rate of change of gradient fields, excessive levels of acoustic noise, and excessive deposition of RF energy, MRI is inherently a very safe imaging modality. For example, it should always be remembered that, during the RF transmitter pulse, large instantaneous RF voltages are present on the transmitter coil and cables. Care should be taken to avoid coupling between these coils and cables and other conductors such as electrocardiogram leads and surface coil cables in the proximity of the patient.

The temporal positional accuracy and repeatability (TPAR) of the digital signals is an important system consideration. 1â to 1-µs update interval with 10-ns TPAR In addition to the RF, gradient, and digital signals, additional outputs may be used to drive resistive magnet shims to correct homogeneity or to provide scan-specific corrections. Over the past decade and a half the development of MR physics has generated elaborate and interdependent waveforms for gradient coils, RF coils, and shim coils.

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