Clinical MR Imaging and Physics
A Tutorial
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Beschreibung
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.
Clear, direct and succint description of the Physics of Magnetic Resonance Description of the practical aspects of MR Imaging in a unique way, that has not been seen before Includes supplementary material: sn.pub/extras
Autor*in
Haris S. Chrysikopoulos
Themen in »Clinical MR Imaging and Physics«
MR Angiography MR Physics MR imaging angiography diagnosis magnetic resonance magnetic resonance imaging magnetic resonance imaging (MRI)
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From the reviews:
"This introductory book is designed to take readers from the fundamentals of proton interactions to the interpretation of clinical MR imaging studies. … All healthcare professionals are the intended audience. The book is certainly suitable for radiologists interested in MRI or MR technologists wanting to learn the essentials of the technique. … provides a good starting point for those involved in MR imaging with a clinical perspective. It is well-illustrated and practically demonstrates how physical principles directly govern the images of any MR imaging study." (R. Terry Thompson, Doody’s Review Service, March, 2009)
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