Computing Cardiac Strain from Variational Optical Flow in Four-Dimensional Echocardiography

2014 ◽  
Author(s):  
Saurabh Vyas ◽  
James S. Gammie ◽  
Philippe Burlina
Keyword(s):  
Optical Flow ◽  
Cardiac Strain ◽  
Dimensional Echocardiography

Cardiac Strain and Rotation Analysis Using Multi-scale Optical Flow

2011 ◽  
pp. 91-102 ◽  
Author(s):  
H. C. van Assen ◽  
L. M. J. Florack ◽  
F. F. J. Simonis ◽  
J. J. M. Westenberg ◽  
G. J. Strijkers
Keyword(s):  
Optical Flow ◽  
Multi Scale ◽  
Cardiac Strain

Motion correction in PET/CT

2005 ◽  
Vol 44 (S 01) ◽  
pp. S46-S50 ◽  
Author(s):  
M. Dawood ◽  
N. Lang ◽  
F. Büther ◽  
M. Schäfers ◽  
O. Schober ◽  
...  
Keyword(s):  
Optical Flow ◽  
Motion Correction ◽  
Motion Vector ◽  
Emission Tomography ◽  
Cardiac Pet ◽  
Novel Approach ◽  
Positron Emission ◽  
Pet Ct ◽  
Flow Algorithm ◽  
Motion Vector Field

Summary:Motion in PET/CT leads to artifacts in the reconstructed PET images due to the different acquisition times of positron emission tomography and computed tomography. The effect of motion on cardiac PET/CT images is evaluated in this study and a novel approach for motion correction based on optical flow methods is outlined. The Lukas-Kanade optical flow algorithm is used to calculate the motion vector field on both simulated phantom data as well as measured human PET data. The motion of the myocardium is corrected by non-linear registration techniques and results are compared to uncorrected images.

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