Enhanced MR Angiography Using Breath Holding
نویسندگان
چکیده
منابع مشابه
Contrast-Enhanced MR Angiography
Magnetic resonance angiography (MRA) is increasingly used to evaluate arterial and venous diseases. Although the resolution of MRA is not as high as that of conventional angiography, it is sufficient to evaluate pathologic conditions in the larger vascular structures of most parts of the body. It is especially useful in patients who cannot tolerate the risks of iodinated contrast agents or arte...
متن کاملOptimization of single shot 3D breath-hold non-enhanced MR angiography of the renal arteries
BACKGROUND Cardiac and navigator-gated, inversion-prepared non-enhanced magnetic resonance angiography techniques can accurately depict the renal arteries without the need for contrast administration. However, the scan time and effectiveness of navigator-gated techniques depend on the subject respiratory pattern, which at times results in excessively prolonged scan times or suboptimal image qua...
متن کاملEvaluation of dynamic gadolinium-enhanced breath-hold MR angiography in the diagnosis of renal artery stenosis.
OBJECTIVE The aim of our study was to evaluate a three-dimensional gadolinium-enhanced breath-hold MR angiography sequence using standard MR gradients in detecting renal artery stenosis. SUBJECTS AND METHODS Forty-two patients referred for angiography for suspected renal artery stenosis underwent both conventional digital subtraction angiography (DSA) and MR angiography. MR angiography was pe...
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Introduction: Contrast-enhanced MRA (CE-MRA) is a well-established methodology that accurately depicts vessel morphology in multiple vascular territories. In order to minimize the signal contribution from background tissues, a precontrast data set is typically subtracted from the post-contrast data set. Parallel acceleration techniques such as GRAPPA and SENSE are routinely used to improve spat...
متن کاملEffect of Breath Holding on Blood Flow Measurement using Fast Velocity Encoded Cine MR Imaging
Introduction Velocity encoded tine (VEC) MR imaging provides quantitative assessment of blood flow in the cardiovascular system. With use of segmented k-space fast VEC MR imaging, noninvasive assessment of blood flow and vasodilator flow reserve in the coronary artery and coronary arterial bypass graft can be obtained within a single breath-hold time. However, it has been pointed out that blood...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1997
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001355060