Bibliographic Details
| Title: |
Elliptical subject-specific model of respiratory motion for cardiac MRI. |
| Authors: |
Burger, Ian1, Meintjes, Ernesta M.1 |
| Source: |
Magnetic Resonance in Medicine. Sep2013, Vol. 70 Issue 3, p722-731. 10p. |
| Abstract: |
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. Magn Reson Med 70:722-731, 2013. © 2012 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
