Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance
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J Cardiovasc Magn Reson · Jan 2006
Assessment of left ventricular outflow tract geometry in non-stenotic and stenotic aortic valves by cardiovascular magnetic resonance.
To assess the geometry and area of the left ventricular outflow tract (LVOT) in non-stenotic and stenotic aortic valves and to determine the aortic valve area (AVA) in non-stenotic valves by magnetic resonance imaging (MRI) using a modified continuity equation. ⋯ The LVOT area calculated from the 3CV-LVOT diameter underestimates the LVOT area compared to planimetry due to an elliptic shape of the LVOT in patients with non-stenotic as well as with stenotic aortic valves. The modified Gorlin equation proved to be less useful to assess AVA in non-stenotic valves, whereas the continuity equation and a modified continuity equation displayed a very good agreement with planimetric area measurements.
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J Cardiovasc Magn Reson · Jan 2006
Detection of coronary stenoses with contrast enhanced, three-dimensional free breathing coronary MR angiography using the gadolinium-based intravascular contrast agent gadocoletic acid (B-22956).
To determine the diagnostic value of the intravascular contrast agent gadocoletic acid (B-22956) in three-dimensional, free breathing coronary magnetic resonance angiography (MRA) for stenosis detection in patients with suspected or known coronary artery disease. ⋯ The use of gadocoletic acid (B-22956) results in an improvement of MR angiographic parameters, asssessability of coronary segments and detection of coronary stenoses > or = 50%.
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J Cardiovasc Magn Reson · Jan 2006
Reproducibility of carotid atherosclerotic lesion type characterization using high resolution multicontrast weighted cardiovascular magnetic resonance.
Cardiovascular magnetic resonance (CMR) can characterize carotid atherosclerosis. The purpose of this study is to evaluate reader agreement of carotid atherosclerotic lesion types by CMR. ⋯ The difference between type I-II and III lesions lies in the definition of the vessel wall. The moderate inter-reader agreement suggests further efforts such as establishment of normal carotid artery wall thickness by a quantitative measure are needed for carotid atherosclerotic lesion characterization.
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J Cardiovasc Magn Reson · Jan 2006
Diagnosis of congenital obstructive aortic arch anomalies in Chinese children by contrast-enhanced magnetic resonance angiography.
The purpose of this study was to evaluate the accuracy of contrast-enhanced magnetic resonance angiography for the diagnosis of congenital obstructive aortic arch anomalies in children and compare it with transthoracic echocardiography and other MR imaging techniques (ECG gated T1-weighted spin-echo imaging and gradient-echo cine imaging). ⋯ Contrast-enhanced magnetic resonance angiography is a reliable, noninvasive imaging technique for the diagnosis of congenital obstructive aortic arch anomalies in children. Occasionally, even more information can be obtained from this technique than from conventional X-ray angiocardiography. Contrast-enhanced magnetic resonance angiography is superior to transthoracic echocardiography and other MR imaging techniques (ECG gated T1-weighted spin-echo imaging and gradient-echo cine imaging) for diagnosis of congenital obstructive aortic arch anomalies in children.