Results 291 to 300 of about 889,067 (345)

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).
Ronald R. Price, C H Lorenz, C L Partain, Jeff L. Creasy   +3 more
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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.
Gene H. Barnett, Charles P. Steiner, Donald W. Kormos   +2 more
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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.
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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.
Stefan G. Ruehm, Jörg F. Debatin, Mathias Goyen   +2 more
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MAGNETIC RESONANCE ANGIOGRAPHY OF THE ABDOMEN

Gastroenterology Clinics of North America, 1995
The applications of abdominal MR angiography have been slow as compared with its applications in the head and neck mainly because of greater technical difficulties in dealing with respiratory motion and the use of the body coil, which has a poorer signal-to-noise ratio than head or surface coils.
Robert R. Edelman, Markus Müller
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Magnetic Resonance Angiography

2013
The clinical use of magnetic resonance angiography (MRA) has rapidly expanded as technological advances in both hardware and imaging techniques overcome previous limitations. This is particularly true for imaging of patients with congenital heart disease (CHD), who are often younger and frequently require continued, lifelong imaging follow-up.
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Magnetic resonance angiography: A review

Academic Radiology, 1998
Summary MR technology continues to advance at a spectacular pace. It is increasingly useful for safe, accurate imaging of vascular anatomy and pathology throughout the body.
Thomas L. Chenevert, Martin R. Prince, David B. Stafford Johnson   +2 more
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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 ...
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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.
Mueller M, J P Finn, Bettina Siewert
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Cerebral magnetic resonance angiography

Neurological Research, 1992
Magnetic resonance angiography (MRA) is an accurate non-invasive tool for imaging the cerebral vessels. It provides morphologic information about the cerebral vessels relying on blood flow as the physical basis for generating contrast between stationary tissues and moving spins.
Heinrich Mattle, Robert R. Edelman
openaire   +3 more sources