Electricity: measuring and testing – Particle precession resonance – Determine fluid flow rate
Patent
1991-10-18
1994-04-26
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Determine fluid flow rate
1286533, G01V 300
Patent
active
053070143
ABSTRACT:
In a 3-D magnetic resonance flow imaging apparatus, the RF excitation field is applied so as to produce a spatial variation of the nuclear spin flip angle within the imaging volume. The spatial variation results in nuclear spins at the volume entrance plane experiencing a relatively small flip angle, and experiencing progressively larger flip angles as they progress into the volume.
REFERENCES:
patent: 4703274 (1987-10-01), Kaufman et al.
patent: 4707659 (1987-11-01), Kunz et al.
patent: 4710718 (1987-12-01), Shaka
patent: 4866386 (1989-09-01), Sattin
patent: 4983921 (1991-01-01), Kramer et al.
patent: 5027070 (1991-06-01), Higuchi
Intracranial Circulation: Pulse-Sequence Considerations in Three-dimensional (Volume) MR Angiography; Jun. 1989; pp. 785-791.
Nuclear Magnetic Resonance Signal From Flowing Nuclei In Rapid Imaging Using Gradient Echoes; Medical Physics Nov./Dec. 1988; pp. 809-814.
MR Angiography By Multiple Thin Slab 3D Acquisition; Magnetic Resonance in Medicine Feb. 1991; pp. 434-451.
Multiple-Readout Selective Inversion Recovery Angiography; Magnetic Resonance in Medicine 1991 Jan.; pp. 244-251.
Variable Excitation Angle AFP Pulses; Magnetic Resonance in Medicine 1989 Mar.; pp. 435-440.
"Improvement of 3-D Acquisition and Visualization in MRI", published in Magnetic Resonance Imaging, vol. 9, No. 3, 1991, pp. 001-013.
"Time-of-Flight MR Flow Imaging: Selective Saturation Recovery With Gradient Refocusing", published in Radiology, 1986, No. 160, pp. 781-785.
3-D MP RAGE--Mugler III Jr., Brookman, Jr., "3-Dimensional Magnetization--Prepared Rapid Gradient--Echo Imaging (3-D MR RAGE)" published in Magnetic Resonance Med. 15, 1990, pp. 152-157.
"MR Angiography With Gradient Motion Refocusing" by Laub G. A., and Kaiser W. A. published in Journal of Computer Assisted Tomography 12(3), 1988, pp. 377-382.
"Flow, Radiofrequency Pulse Sequences, and Gradient Magnetic Fields: Basic Interactions and Adaptation to Angiographic Imaging" published in Topics in Magnetic Resonance Imaging, vol. 3, Issue 3, 1991, pp. 1-11.
Arana Louis
Edelman Lawrence C.
Ludwin Richard M.
Siemens Medical Systems Inc.
LandOfFree
Inflow MR angiography with spatially variable flip angles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inflow MR angiography with spatially variable flip angles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflow MR angiography with spatially variable flip angles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1714044