Novel prospective respiratory motion correction approach for free-breathing coronary MR angiography using a patient-adapted affine motion model.
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A novel technique is presented which enables the calibration of a 3D affine respiratory motion model to the individual motion pattern of the patient to address nonlinear properties and hysteresis effects of the model parameters with respect to the conventional diaphragmatic navigator.Abstract:
A novel technique is presented which enables the calibration of a 3D affine respiratory motion model to the individual motion pattern of the patient. The concept of multiple navigators and precursory navigators is introduced to address nonlinear properties and hysteresis effects of the model parameters with respect to the conventional diaphragmatic navigator. The optimal combination and weighting of the navigators is determined on the basis of a principal component analysis (PCA). Thus, based on a given navigator measurement the current motion state of the object can be predicted by means of the calibrated motion model. The 3D motion model is applied in high-resolution coronary MR angiography examinations (CMRA) to prospectively correct for respiration-induced motion. The basic feasibility of the proposed calibration procedure was shown in 16 volunteers. Furthermore, the application of the calibrated motion model for CMRA examinations of the right coronary artery (RCA) was tested in 10 volunteers. The superiority of a calibrated 3D translation model over the conventional 1D translation model with a fixed correction factor and the potential of affine prospective motion correction for CMRA are demonstrated.read more
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References
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Coronary Magnetic Resonance Angiography for the Detection of Coronary Stenoses
W. Yong Kim,W. Yong Kim,Peter G. Danias,Matthias Stuber,Scott D. Flamm,Sven Plein,Eike Nagel,Susan E. Langerak,Oliver M. Weber,Erik Morre Pedersen,Matthias Schmidt,René M. Botnar,Warren J. Manning,Warren J. Manning +13 more
TL;DR: Among patients referred for their first x-ray coronary angiogram, three-dimensional coronary magnetic resonance angiography allows for the accurate detection of coronary artery disease of the proximal and middle segments.
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Adaptive technique for high-definition MR imaging of moving structures.
Richard L. Ehman,Joel P. Felmlee +1 more
TL;DR: An adaptive technique for measuring and correcting the effects of patient motion during magnetic resonance image acquisition was developed and tested and shows promise for addressing the problem of respiratory motion in thoracoabdominal imaging.
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Respiratory motion of the heart: kinematics and the implications for the spatial resolution in coronary imaging
TL;DR: It was found that during tidal breathing the movement of the heart due to respiration is dominated by superior‐inferior (SI) motion, which is linearly related to the SI motion of the diaphragm.
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Coronary arteries: breath-hold MR angiography.
TL;DR: Ultrafast MR angiography of the coronary arteries is feasible with use of a standard body coil and, with further development, may become a clinically useful imaging application.
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Double-oblique free-breathing high resolution three-dimensional coronary magnetic resonance angiography
Matthias Stuber,Matthias Stuber,René M. Botnar,René M. Botnar,Peter G. Danias,Daniel K. Sodickson,Kraig V. Kissinger,Marc Van Cauteren,Jan De Becker,Warren J. Manning +9 more
TL;DR: Double-oblique submillimeter free-breathing coronary MRA allows depiction of extensive parts of the native coronary arteries and has the potential to be applied in broader prospective multicenter studies where coronary Mra is compared with X-ray angiography.
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