TY - JOUR
T1 - Quantification of in-plane motion of the coronary arteries during the cardiac cycle
T2 - Implications for acquisition window duration for MR flow quantification
AU - Hofman, Mark B M
AU - Wickline, Samuel A.
AU - Lorenz, Christine H.
PY - 1998/5/1
Y1 - 1998/5/1
N2 - Motion of the coronary arteries during the heart cycle can result in image blurring and inaccurate flow quantification by MR. This condition applies particularly for longer acquisition windows that are typical of breath-hold coronary flow measurements. To determine the sensitivity of the technique to in-plane motion of different coronary arteries, the temporal variation in coronary position was measured in a plane perpendicular to the proximal portion of the vessel. The results indicated the presence of substantial displacement of the coronary arteries within the cardiac cycle, with a magnitude of motion approximately twice as large for the right as for the left coronary arteries. An estimation of the resulting vessel blurring was calculated, showing that the duration of the acquisition window for high spatial resolution coronary flow acquisitions should be less than 25 to 120 msec, depending on the specific coronary artery studied. In addition, these data specify optimal acquisition window placement for high resolution coronary angiography.
AB - Motion of the coronary arteries during the heart cycle can result in image blurring and inaccurate flow quantification by MR. This condition applies particularly for longer acquisition windows that are typical of breath-hold coronary flow measurements. To determine the sensitivity of the technique to in-plane motion of different coronary arteries, the temporal variation in coronary position was measured in a plane perpendicular to the proximal portion of the vessel. The results indicated the presence of substantial displacement of the coronary arteries within the cardiac cycle, with a magnitude of motion approximately twice as large for the right as for the left coronary arteries. An estimation of the resulting vessel blurring was calculated, showing that the duration of the acquisition window for high spatial resolution coronary flow acquisitions should be less than 25 to 120 msec, depending on the specific coronary artery studied. In addition, these data specify optimal acquisition window placement for high resolution coronary angiography.
KW - Cardiac motion
KW - Coronary artery
KW - Flow quantification
KW - Image blurring
KW - MRI
UR - http://www.scopus.com/inward/record.url?scp=0031860874&partnerID=8YFLogxK
U2 - 10.1002/jmri.1880080309
DO - 10.1002/jmri.1880080309
M3 - Article
C2 - 9626870
AN - SCOPUS:0031860874
VL - 8
SP - 568
EP - 576
JO - Journal of magnetic resonance imaging : JMRI
JF - Journal of magnetic resonance imaging : JMRI
SN - 1053-1807
IS - 3
ER -