Jpa. Kuijer et al., Simultaneous MRI tagging and through-plane velocity quantification: A three-dimensional myocardial motion tracking algorithm, J MAGN R I, 9(3), 1999, pp. 409-419
A tracking algorithm was developed for calculation of three-dimensional poi
nt-specific myocardial motion. The algorithm was designed for images acquir
ed with simultaneous magnetic resonance imaging (MRI) grid tagging and thro
ugh-plane velocity quantification. The tagging grid provided the in-plane m
otion while the velocity quantification measured the through-plane motion,
In four healthy volunteers, the in vivo performance was evaluated by compar
ing the systolic through-plane displacement with the displacement of taggin
g-grid intersections in long-axis images, The correlation coefficient was 0
.93 (P < 0.001, N = 183), A t-test for paired samples revealed a small unde
restimation of the through-plane displacement by 0.04 +/- 0.09 cm (mean +/-
SD, P < 0.001) on an average displacement of 0.77 +/- 0.23 cm toward the a
pex. The authors conclude that three-dimensional point-specific motion trac
king based on simultaneous tagging and velocity quantification is competiti
ve with other methods such as tagging in mutually orthogonal image planes o
r quantification of three orthogonal velocity components, (C) 1999 Wiley-Li
ss, Inc.