Results 281 to 290 of about 96,899 (345)

Computed Tomography Angiography and Magnetic Resonance Angiography of Congenital Anomalies of Pulmonary Veins.

Journal of computer assisted tomography, 2019
We aimed to review computed tomography and magnetic resonance angiography of congenital anomalies of pulmonary veins. Total anomalous pulmonary venous return shows all pulmonary veins drain abnormally in another site rather than left atrium.
A. A. Abdel Razek, Hala Al-Marsafawy, M. Elmansy, M. A. El-Latif, D. Sobh   +4 more
semanticscholar   +1 more source

Magnetic resonance angiography

Seminars in Vascular Surgery, 2004
MRA and MRI have become increasingly important diagnostic modalities in vascular surgery. The ability to obtain cross-sectional and angiographic images by these noninvasive and non-nephrotoxic modalities represents one of the most significant advances in vascular surgery over the past decade.
Erik K, Insko, Jeffrey P, Carpenter
openaire   +2 more sources

Multiecho magnetic resonance angiography

Magnetic Resonance in Medicine, 1987
AbstractSeveral pulse sequences which generate projected MR angiograms are presented. These pulse sequences exploit multiple‐gradient refocused echoes to obtain several independent angiograms, which can be combined or separately analyzed to provide more information than an individual angiogram. For example, a series of angiograms, each with a different
C L, Dumoulin, S P, Souza, H, Feng
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Coronary magnetic resonance angiography

Journal of Magnetic Resonance Imaging, 2007
AbstractCoronary magnetic resonance angiography (MRA) is a powerful noninvasive technique with high soft‐tissue contrast for the visualization of the coronary anatomy without X‐ray exposure. Due to the small dimensions and tortuous nature of the coronary arteries, a high spatial resolution and sufficient volumetric coverage have to be obtained. However,
Matthias, Stuber, Robert G, Weiss
openaire   +2 more sources

Stereotactic Magnetic Resonance Angiography

Stereotactic and Functional Neurosurgery, 1992
Visualization of the surgical trajectory with respect to the cerebral vasculature may enhance the safety of some stereotactic neurosurgical procedures. Traditional stereotactic angiography is tedious and, being an invasive procedure, poses some risk to the patient.
G H, Barnett, D W, Kormos, C P, Steiner
openaire   +2 more sources

Magnetic Resonance Angiography Techniques

Investigative Radiology, 1992
After a radio frequency pulse, the decay of the magnetic resonance (MR) signal is described by two relaxation processes, T1 and T2. T1 describes the rate at which the magnetization realigns itself along the external magnetic field direction (ML), and T2 describes the rate of decay of the magnetization component along the transverse axis (MT).
R R, Price, J L, Creasy, C H, Lorenz, C L, Partain   +3 more
openaire   +2 more sources

Peripheral Magnetic Resonance Angiography

Topics in Magnetic Resonance Imaging, 2001
Peripheral vascular disease (PVD) is a common disorder in western society. Reflecting on the risks and costs of contrast arteriography, magnetic resonance angiography is a powerful noninvasive imaging modality for the diagnostic workup of patients with peripheral vascular disease.
M, Goyen, J F, Debatin, S G, Ruehm
openaire   +2 more sources

GI magnetic resonance angiography

Gastrointestinal Endoscopy, 2002
MRA is a type of magnetic resonance imaging (MRI) in which blood appears bright. To form a magnetic resonance (MR) angiogram, a 3-dimensional set of thin sections is acquired through the region of interest. The images are then processed by computer to create a 2-dimensional projected display that resembles a conventional angiogram.
openaire   +2 more sources

PORTAL MAGNETIC RESONANCE ANGIOGRAPHY

Magnetic Resonance Imaging Clinics of North America, 1993
MR angiography has shown definite clinical use in the portal venous system. Methods have been developed for noninvasive assessment of portal venous anatomy and blood flow using a variety of techniques. Time-of-flight techniques for portal angiography and both time-of-flight and phase-contrast techniques for flow measurement are reviewed.
J P, Finn, B, Siewert, M, Mueller
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Abdominal Magnetic Resonance Angiography

Magnetic Resonance Imaging Clinics of North America, 2020
MR imaging hardware and software improvements have led to new applications for contrast-enhanced and noncontrast-enhanced magnetic resonance angiography in the abdomen and pelvis. Higher magnetic field strength MR imaging scanners have greater signal-to-noise ratio and contrast-to-noise ratio, which is used to improve spatial resolution or temporal ...
openaire   +2 more sources