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Publication Detail
Validation of volume blood flow measurements using three-dimensional distance-concentration functions derived from digital x-ray angiograms
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Hawkes DJ, Seifalian AM, Colchester ACF, Iqbal N, Hardingham CR, Bladin CF, Hobbs KEF
  • Publication date:
    01/01/1994
  • Pagination:
    434, 442
  • Journal:
    Investigative Radiology
  • Volume:
    29
  • Issue:
    4
  • Status:
    Published
  • Print ISSN:
    0020-9996
Abstract
RATIONALE AND OBJECTIVES. The authors present phantom validation of a method for computing pulsatile flow waveforms in arterial vessels from high-frame-rate biplane x-ray angiograms. METHODS. 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°, 30°, and 35° to the imaging plane, with flow rates and waveforms expected in vivo. RESULTS. 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. CONCLUSIONS. A practical method for computing highly pulsatile flow waveforms in vivo in tortuous vessels is presented. © 1994 J.B. Lippincott Company.
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