Magnetic resonance method and device for measuring a periodically varying fluid flow in an object
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United States of America Patent
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Aug 20, 2002
Grant Date -
N/A
app pub date -
Nov 18, 1999
filing date -
Nov 18, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method for in vivo measurement of a periodically varying fluid flow in an object by means of magnetic resonance. The method includes a step for applying first and second additional magnetic field gradients in order to shift the phase of a reference magnetization, which phase shift relates to a net flow of the fluid during an interval between the application of the additional magnetic field gradients. According to the invention, near a phase of a period of the periodically varying fluid flow an excitation RF pulse is generated, the first additional gradient is applied and a first additional RF pulse is generated and near a corresponding phase of a second period of the periodically varying fluid flow a second additional RF pulse is generated and the second additional gradient is applied.
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