Keywords:
Cardiac, Molecular imaging, Ultrasound physics, Echocardiography, Echocardiography (transoesophageal), MR, Computer Applications-3D, History, Imaging sequences, Image verification, Pathology, Patterns of Care
Authors:
M. Karvandi, S. Ranjbar, S. A. Hassantash, M. Foroughi; Tehran/IR
Methods and Materials
Echocardiography imaging of the mitral valve motion during the cardiac cycle of planes TTE in the short axis,
long axis and four chamber views,
and multi-planes TEE in the lower esophageal views at 0,10,15,30,
45-60,
75,
80,
90,
110-125 and 135 degrees were prospectively acquired for 200 patients of 65 time-frames from diastole to systole(early diastole,
mid diastole,
atrial systole,
end of diastole,
end of systole).
In each plane and for each frame during diastole to systole,
mitral valve annulus and leaflets,
and bases,
middles and tips of AML and PML,
were manually identified using MATLAB software.
Then,
3-D MV annulus geometry,
leaflets measurements,
AML and PML positions were automatically computed for each frame,
and used as input to displacement vectors modeling of the mitral valve leaflets.
By solving mathematical equations of inelastic properties of leaflets,
each plane was replaced with 60 vectors of displacement and ultimately the mitral valve leaflets were realized by 1125 vectors of displacements where show also translations,
rotations and pure strains of bases,
middles and tips of AML and PML simultaneously per cardiac cycle.