Improved respiratory navigator gating for thoracic 4D flow MRI
نویسندگان
چکیده
منابع مشابه
Comparison of respiratory motion suppression techniques for 4D flow MRI.
PURPOSE The purpose of this work was to assess the impact of respiratory motion and to compare methods for suppression of respiratory motion artifacts in 4D Flow MRI. METHODS A numerical 3D aorta phantom was designed based on an aorta velocity field obtained by computational fluid mechanics. Motion-distorted 4D Flow MRI measurements were simulated and several different motion-suppression tech...
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For real-time 3D visualization of respiratory organ motion for MRI-guided therapy, a new adaptive 4D MR imaging method based on navigator echo and multiple gating windows was developed. This method was designed to acquire a time series of volumetric 3D images of a cyclically moving organ, enabling therapy to be guided by synchronizing the 4D image with the actual organ motion in real time. The ...
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Introduction: Correcting respiratory motion is a challenging task in coronary MRI. Commonly, a pencil-beam right hemi-diaphragm (RHD) navigator is used with a constant 5-7mm gating window (GW) [1]. Data following the navigator signal is only used in image reconstruction if the navigator signal is within the GW otherwise it is reacquired. This usually results in 30%-70% gating efficiency which p...
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Background Respiratory motion compensation is often required in cardiovascular MRI applications especially when the scan time is not suitable for breath-hold. Respiratory self-gating (RSG) is a technique that estimate the respiratory motion based on k-space signal from the imaging object and is especially advantageous in CINE-like applications where conventional diaphragm navigator frequently i...
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Magnetic resonance imaging (MRI) has become an important tool for the clinical evaluation of patients with cardiovascular disease. Since its introduction in the late 1980s, 2-dimensional phase contrast MRI (2D PC-MRI) has become a routine part of standard-of-care cardiac MRI for the assessment of regional blood flow in the heart and great vessels. More recently, time-resolved PC-MRI with veloci...
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ژورنال
عنوان ژورنال: Magnetic Resonance Imaging
سال: 2015
ISSN: 0730-725X
DOI: 10.1016/j.mri.2015.04.008