Method for reduction of MR image artifacts due to flowing nuclei by gradient moment nulling

Patent · Tue Mar 15 04:00:00 EST 1988

OSTI ID:5126453

Glover, G H; O'Donnell, M

The patent describes a method of compensating for random phase accumulations in magnetic resonance signals acquired from a region of an object having stationary and flowing nuclear spins. The method includes the implementation of views, each of which includes irradiation of the region by an RF excitation pulse as the Larmor frequency to produce a spin-echo signal at a time TE, and application of a pulsed magnetic field gradient having adjustable amplitude and duration parameters along at least one dimensional axis of the region. The random phase accumulations are due to fluctuations of flow velocity of the flowing spins from view to view. The method comprises the improvement: modifying at least one of the amplitude and duration parameters so as to make at least one of the higher moments of the magnetic field gradient equal zero by satisfying for the flowing nuclear spins.

• Assignee: General Electric Co., Milwaukee, WI
• Patent Number(s): US 4731583
• OSTI ID: 5126453
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
AMPLITUDES
ANGULAR MOMENTUM
CORRECTIONS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FUNCTION GENERATORS
IMAGE PROCESSING
IMAGE SCANNERS
IMAGES
LARMOR RADIUS
MAGNETIC FIELDS
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
PARTICLE PROPERTIES
PROCESSING
PULSE GENERATORS
RADIATIONS
RADIOWAVE RADIATION
RESONANCE
SIGNAL CONDITIONING
SPIN
SPIN ECHO