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Neurology pp 383-388 | Cite as

Transition from Computer Tomography to Nuclear Magnetic Resonance Scanning

  • W. Oldendorf
Conference paper

Abstract

Since it became commercially available in 1973, X-ray computer (axial) tomography (CT) scanning has revolutionized the practice of neurology and neurosurgery because it has allowed direct visualization of brain tissue structures without the introduction of any significantly toxic contrast media. A CT scan is actually a map of specific gravity, the local tissue density. Bone appears white because it is significantly more dense than brain tissue. Brain tissue in turn is slightly more dense than the cerebrospinal fluid which fills the ventricles and the subarachnoid space. Within the hemispheres, white matter appears darker since it is slightly less dense than the surrounding gray matter.

Keywords

Nuclear Magnetic Resonance Main Field Radio Frequency Signal Nuclear Magnetic Resonance Imaging Magnetic Gradient 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • W. Oldendorf

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