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- W2011125887 abstract "The authors present phantom validation of a method for computing pulsatile flow waveforms in arterial vessels from high-frame-rate biplane x-ray angiograms.The three-dimensional course of a blood vessel is constructed from biplane digital x-ray angiograms. A parametric image of contrast mass versus time and true three-dimensional path length is generated. Adjacent contrast mass-distance profiles are matched to compute instantaneous velocity, which is multiplied by cross-sectional area to yield volume flow. An electromagnetic flowmeter was used to validate flow estimates in a phantom consisting of 150-mm tubes 3, 4, and 6 mm in diameter, orientated 15 degrees, 30 degrees, and 35 degrees to the imaging plane, with flow rates and waveforms expected in vivo.Mean and peak flows were accurate to within 9% and 10%, respectively, for velocities of less than 1 meter/second at a frame rate of 25 frames per second.A practical method for computing highly pulsatile flow waveforms in vivo in tortuous vessels is presented." @default.
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- W2011125887 date "1994-04-01" @default.
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- W2011125887 title "Validation of Volume Blood Flow Measurements Using Three-Dimensional Distance-Concentration Functions Derived from Digital X-Ray Angiograms" @default.
- W2011125887 doi "https://doi.org/10.1097/00004424-199404000-00009" @default.
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