Respiratory motion in coronary magnetic resonance angiography: A comparison of different motion models
نویسندگان
چکیده
منابع مشابه
Respiratory Motion of the Heart: Implications for Magnetic Resonance Coronary Angiography
Magnetic resonance (MR) coronary imaging is susceptible to artifacts caused by motion of the heart. The purpose of this thesis was to study the respiratory motion of the coronary arteries and to use the results to develop strategies for improved MR imaging. The first section of the thesis describes an MR motion correction technique for objects undergoing a 3D affine transformation. The remainde...
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Background Electrocardiogram and respiratory navigator (NAV)gated 3D whole-heart magnetic resonance angiography (MRA) acquired with an intravascular gadolinium-based contrast agent and a non-selective inversion recovery (IR) pulse to null the myocardial signal generates a highresolution anatomic dataset allowing for a comprehensive evaluation of intra-cardiac, coronary, and vascular abnormaliti...
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Despite technical advances, respiratory motion remains a major impediment in a substantial amount of patients undergoing coronary magnetic resonance angiography (CMRA). Traditionally, respiratory motion compensation has been performed with a one-dimensional respiratory navigator positioned on the right hemi-diaphragm, using a motion model to estimate and correct for the bulk respiratory motion ...
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Introduction: WH MRCA [1-4] examinations are usually performed during free breathing, and the Real-time Motion Correction (RMC) coefficient is important for obtaining good image quality. However, this coefficient differs in each patient, which may result in degradation of image quality. We have developed the Motion Pre-Analysis Method to determine the appropriate RMC coefficient before WH MRCA ...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2002
ISSN: 1053-1807
DOI: 10.1002/jmri.10112