Arterial MR imaging phase-contrast flow measurement: improvements with varying velocity sensitivity during cardiac cycle

Radiology
Steffen RinggaardErik M Pedersen

Abstract

To reduce noise in velocity images of magnetic resonance (MR) phase-contrast measurements, the authors implemented and evaluated a pulse sequence that enables automatic optimization of the velocity-encoding parameter V(enc) for individual heart phases in pulsatile flow on the basis of a rapid prescan. This sequence was prospectively evaluated by comparing velocity-to-noise ratios with those from a standard MR flow scan obtained in the carotid artery in eight volunteers. This sequence was shown to improve velocity-to-noise ratios by a factor of 2.0-6.0 in all but the systolic heart phase and was determined to be an effective technique for reducing noise in phase-contrast velocity measurements.

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Citations

Jul 15, 2005·The International Journal of Cardiovascular Imaging·Thomas Sangild SørensenErik Morre Pedersen
Sep 2, 2010·Topics in Magnetic Resonance Imaging : TMRI·William S Kerwin, Gador Canton
Apr 19, 2005·Journal of Magnetic Resonance Imaging : JMRI·Paul E SummersMaria Drangova
Oct 16, 2012·Journal of Magnetic Resonance Imaging : JMRI·Anders NilssonFreddy Ståhlberg
Feb 25, 2015·Journal of Magnetic Resonance Imaging : JMRI·Shreyas S VasanawalaAlbert Hsiao
Apr 6, 2004·Magnetic Resonance Imaging·Sheng Ping WuErik Morre Pedersen
May 24, 2016·IEEE Transactions on Medical Imaging·Joaquin MuraSergio Uribe
Aug 20, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Liliana E MaSusanne Schnell
Feb 12, 2017·Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance·Aiqi SunChun Yuan

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