Key result
A subject-specific nonlinear elliptical affine model performed significantly better than a linear affine model for respiratory motion correction in cardiac MRI (P < 0.05).
Why the study?
Does a subject-specific nonlinear elliptical affine model improve respiratory motion correction in cardiac MRI compared to a linear affine model in healthy volunteers?
Does a subject-specific nonlinear elliptical affine model improve respiratory motion correction in cardiac MRI compared to a linear affine model in healthy volunteers?
A subject-specific nonlinear elliptical affine model improves respiratory motion correction in cardiac MRI and can be constructed from a short 25-second prescan.
Nonlinear models merit validation in patients; leaves open routine cardiac MRI adoption.
Respiratory motion is a major problem in cardiac MRI. In this work, the displacement of the heart relative to the diaphragm was investigated. A subject-specific nonlinear elliptical affine model has been developed to incorporate the effect of hysteresis in motion correction. Nine healthy volunteers participated in a study in which the diaphragm position and an image of the heart were acquired during each cardiac cycle, while breathing freely. The elliptical model was compared to a linear affine model, and the results show that the elliptical model performed significantly (P < 0.05) better than the linear model. Further, it has been established that the model can be constructed from 25 s of prescan data, which makes it feasible to perform a short prescan to construct the model, so that subject-specific prospective motion correction of the heart can be integrated into structural cardiac MRI sequences.
No takes yet. Share an insight, caveat, or question.
Burger et al. (2012) studied Healthy volunteers (cardiac MRI) (n=9). Subject-specific nonlinear elliptical affine model vs. Linear affine model was evaluated on Model performance for respiratory motion correction (p=< 0.05). A subject-specific nonlinear elliptical affine model performed significantly better than a linear affine model for respiratory motion correction in cardiac MRI (P < 0.05).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: