Clinical MR Imaging and Physics - A Tutorial (Paperback, 2009 ed.)

Keywords Spin > Electromagnetic radiation > Resonance > Nucleus > Hydrogen > Proton > Certain atomic nuclei possess inherent magnetic Let us summarize the MRI procedure. Te patient properties called spin, and can interact with electro- is placed in a magnetic feld and becomes temporarily 1 magnetic (EM) radiation through a process called magnetized. Resonance is achieved through the - resonance. When such nuclei absorb EM energy they plication of specifc pulses of EM radiation, which is proceed to an excited, unstable confguration. Upon absorbed by the patient. Subsequently, the excess - return to equilibrium, the excess energy is released, ergy is liberated and measured. Te captured signal producing the MR signal. Tese processes are not is processed by a computer and converted to a gray random, but obey predefned rules. scale (MR) image. Te simplest nucleus is that of hydrogen (H), con- Why do we need to place the patient in a m- sisting of only one particle, a proton. Because of its net? Because the earth's magnetic feld is too weak to abundance in humans and its strong MR signal, H be clinically useful; it varies from 0. 3-0. 7 Gauss (G). is the most useful nucleus for clinical MRI. Tus, foC r urrent clinical MR systems operate at low, mid or our purposes, MRI refers to MRI of hydrogen, and for h igh feld strength ranging from 0. 1 to 3.

General

Imprint:	Springer-Verlag
Country of origin:	Germany
Release date:	November 2008
First published:	November 2008
Authors:	Haris S. Chrysikopoulos
Dimensions:	276 x 203 x 12mm (L x W x T)
Format:	Paperback
Pages:	176
Edition:	2009 ed.
ISBN-13:	978-3-540-77999-5
Categories:	Books > Medicine > Other branches of medicine > Medical imaging > Nuclear magnetic resonance (NMR / MRI)
LSN:	3-540-77999-X
Barcode:	9783540779995

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