Directional analysis of cardiac motion field from gated fluorodeoxyglucose PET images using the Discrete Helmholtz Hodge Decomposition

•A method is proposed for decomposing the cardiac motion field to obtain rotation.•Contrary rotation observed between base and apex in systole, reversing in diastole.•Quantification of rotation would requires further processing after decomposition. Extract directional information related to left ven...

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Bibliographic Details
Published in:Computerized medical imaging and graphics 2018-04, Vol.65, p.69-78
Main Authors: Sims, J.A., Giorgi, M.C., Oliveira, M.A., Meneghetti, J.C., Gutierrez, M.A.
Format: Article
Language:English
Subjects:
Algorithms
Cardiac motion field analysis
Cardiovascular disease
Decomposition
Diastole
Discrete element method
Discrete Helmholtz Hodge Decomposition
Divergence
Fluid flow
Heart
Heart Ventricles
Humans
Image Processing, Computer-Assisted - methods
Information processing
Movement - physiology
Optical flow
Optical flow (image analysis)
Positron emission
Positron emission tomography
Positrons
Rotation
Superposition (mathematics)
Systole
Tomography
Torsion
Ventricle
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Summary:•A method is proposed for decomposing the cardiac motion field to obtain rotation.•Contrary rotation observed between base and apex in systole, reversing in diastole.•Quantification of rotation would requires further processing after decomposition. Extract directional information related to left ventricular (LV) rotation and torsion from a 4D PET motion field using the Discrete Helmholtz Hodge Decomposition (DHHD). Synthetic motion fields were created using superposition of rotational and radial field components and cardiac fields produced using optical flow from a control and patient image. These were decomposed into curl-free (CF) and divergence-free (DF) components using the DHHD. Synthetic radial components were present in the CF field and synthetic rotational components in the DF field, with each retaining its center position, direction of motion and diameter after decomposition. Direction of rotation at apex and base for the control field were in opposite directions during systole, reversing during diastole. The patient DF field had little overall rotation with several small rotators. The decomposition of the LV motion field into directional components could assist quantification of LV torsion, but further processing stages seem necessary.
ISSN:0895-6111
1879-0771
DOI:10.1016/j.compmedimag.2017.06.004