Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data grouped in the sections named "Externally Awarded" or "Internally Disbursed" (shown on the profile page) to your Research Finance Administrator. Your can find your Research Finance Administrator at http://www.ucl.ac.uk/finance/research/post_award/post_award_contacts.php by entering your department
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
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:
  • Authors:
    Hawkes DJ, Seifalian AM, Colchester AC, Iqbal N, Hardingham CR, Bladin CF, Hobbs KE
  • Publication date:
  • Pagination:
    434, 442
  • Journal:
  • Volume:
  • Issue:
    020-9996 (Print), 4
  • Print ISSN:
  • Keywords:
    Algorithms, Angiography, Digital Subtraction, blood, Blood Flow Velocity, Blood Vessels, Humans, Image Processing, Computer-Assisted, London, methods, Models, Cardiovascular, Structural, physiology, Pulsatile Flow, Research Support, Non-U.S.Gov't
  • Addresses:
    Division of Radiological Sciences, UMDS, Guy's Hospital, London, United Kingdom
  • Notes:
    DA - 19940816
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 degrees, 30 degrees, and 35 degrees 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
Publication data is maintained in RPS. Visit https://rps.ucl.ac.uk
 More search options
UCL Researchers
Dept of Med Phys & Biomedical Eng
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by