Measurement of flow using a complex difference method of magneti

Details Measurement of flow using a complex difference method of magneti Measurement of flow using a complex difference method of magneti

1993-08-13

1995-04-18

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Determine fluid flow rate

324309, G01V 300

Patent

active

054081807

ABSTRACT:
NMR image data is acquired with velocity encoding gradients applied and both a phase difference image array and a complex difference image array are produced. A flow image is produced from the complex difference image array after it is corrected for spin saturation effects and calibrated using information derived from the phase difference image array. Total blood flow through vessels can be measured from the flow image.

REFERENCES:
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patent: 5226418 (1993-07-01), Bernstein et al.
patent: 5363042 (1994-11-01), Dumoulin
David M. Weber, et al.; Quantitative Velocity Images from Thick Slab 2D Phase Contrast; MRM 29:216 (1993); 216-225 (mo. of pub. unknown).
Chao Tang, et al.; Accuracy of Phase-Contrast Flow Measurements in the Presence of Partial-Volume Effects; JMRI vol. 3, No. 2, 1993; 377-384 (mo. of pub. unknown).
Ronald L. Wolf, et al.; Analysis of Systematic and Random Error in MR Volumetric Flow Measurements; MRM 39:82-91 (1993); 82-91 (mo. of pub. unknown).
Chao Tang, et al.; Correction of Partial Volume Effect in phase contrast flow measurements; Sep. 17, 1993; 22 pages (mo. of pub. unknown).

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