True 2-D Velocity Display by Multiscale Motion Mapping (Triple-M Imaging) Allows New Insights into Complex Cardiac Motion Patterns
C.H. Jansen, M. Sühling, M. Arigovindan, S. Marsch, M. Unser, P. Hunziker
Proceedings of the Fifty-Second Annual Scientific Session of the American College of Cardiology (ACC'03), Chicago IL, USA, March 30-April 2, 2003, [Journal of the American College of Cardiology, vol. 41, no. 6, supp. 2, March 19, 2003], pp. 455A–456A.
Background: Quantitative motion assessment in echo usually relies on tissue Doppler & border detection algorithms despite known limitations.
Methods: Multiscale motion Mapping is a novel image processing technique combining optical flow & spline imaging in space & time. Using all available grayscale info, it yields quantitative motion maps which are neither angle dependent nor limited to visible borders. Motion measurement is possible in any image sector. The technique was validated in an echo phantom and applied to a variety of clinical echos.
Results: Measured velocities (range, 0 - 24 cm⁄s) corresponded to known motion of the phantom. In contrast to simultaneous tissue Doppler imaging (only displaying motion vectors parallel to the beam), Multiscale Motion Mapping yielded true 2D motion vectors. In clinical echos, comprehensive motion information became visible: pericardial, myocardial, valvular and anular trajectories coincided with known motion. Phenomena not accessible to quantitation hitherto became evident, like circular mitral anulus motion and myocardial motion with components both inward & towards the apex. Radial & torsional apex motion in the short axis view also became vislble.
Conclusion: Multiscale Motion Mapping is an exciting new echo imaging modality that yields true 2-dimensional Doppler independent and border independent motion maps. This broadly applicable technique thus allows new physiologic and pathophysiologic insights into complex cardiac motion.
@INPROCEEDINGS(http://bigwww.epfl.ch/publications/jansen0305.html,
AUTHOR="Jansen, C.H. and S{\"{u}}hling, M. and Arigovindan, M. and
Marsch, S. and Unser, M. and Hunziker, P.",
TITLE="True {2-D} Velocity Display by Multiscale Motion Mapping
({Triple-M} Imaging) Allows New Insights into Complex Cardiac Motion
Patterns",
BOOKTITLE="Fifty-Second Annual Scientific Session of the American
College of Cardiology ({ACC'03})",
YEAR="2003",
editor="",
volume="41, no. 6, supp. 2, March 19, 2003",
series="Journal of the American College of Cardiology",
pages="455A--456A",
address="Chicago IL, USA",
month="March 30-April 2,",
organization="",
publisher="",
note="")