Surgery – Truss – Pad
Patent
1991-01-31
1991-06-11
Smith, Ruth S.
Surgery
Truss
Pad
324306, 324309, A61B 5055
Patent
active
050223976
ABSTRACT:
Several sequences of radio-frequency and magnetic field gradients are presented for obtaining from a sample multiple response echo signals from which to obtain a plurality of independent angiograms, which can be combined or separately analyzed to provide more information than an individual angiogram, but in substantially the same amount of time as a single angiogram. For example, a series of angiograms, each with a different projection axis, can be obtained in the time required to obtain a single angiogram using a single echo method. If the view angle of each echo is the same, then the acquired angiograms can be added to enhance the signal-to-noise ratio. Another pulse sequence simultaneously obtains two or more angiograms, each sensitive to one of two orthogonal flow components of the overall blood flow; the angiograms are then added to give an angiogram which is sensitive to total flow in all directions. Multiple velocity ranges are accommodated in a fourth sequence form.
REFERENCES:
patent: 4458203 (1984-07-01), Young
patent: 4568880 (1986-02-01), Sugimoto
patent: 4714081 (1987-12-01), Dumoulin et al.
patent: 4796635 (1989-01-01), Dumoulin
patent: 4852037 (1989-05-01), Granot
Davis Jr. James C.
General Electric Company
Smith Ruth S.
Snyder Marvin
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