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Topic: Magnetic Resonance Angiography

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	Magnetic Resonance Angiography (Site not responding. Last check: 2007-10-10)
		Magnetic resonance angiography, or MRA, is a form of magnetic resonance imaging that uses radiowaves and a magnetic field to noninvasively and painlessly visualize close up the structure of and blood flow within blood vessels.
		MRA has a similar resolution capability to contrast X-ray angiography, but it does not require the use of contrast agents and is associated with fewer complications.
		Magnetic resonance angiography, or MRA, is a form of magnetic resonance imaging (MRI) that, like MRI, uses radiowaves and magnetic fields to create images of the organs and tissues inside the body.
	www.centinelaradiology.com /magnetic.html (399 words)

	Magnetic Resonance Angiography (MRA)
		Magnetic resonance imaging (MRI) is a method of producing extremely detailed pictures of body tissues and organs without the need for x-rays.
		MRA provides detailed images of blood vessels without using any contrast material, although a special form of contrast material is often given to make the MRI images even clearer.
		MRA is also used to detect disease in the aorta and in blood vessels supplying the kidneys, lungs and legs.
	www.radiologyinfo.org /content/mr-angiography.htm (1829 words)

	Magnetic Resonance Angiography
		Magnetic resonance imaging (MRI) is a method of producing highly detailed images of the body without the need for x-rays.
		MRA techniques have dramatically improved over the last several years and MRA is now being used to non-invasively detect and diagnose disorders of the blood vessels without the need for more invasive conventional catheter angiography.
		Researchers at TWH are at the forefront in MRA research and are working toward development, refinement and evaluation of MRA techniques that will in the future replace conventional catheter angiography in the diagnostic work-up of vascular disease.
	brainavm.uhnres.utoronto.ca /malformations/content/MRA.html (180 words)

	Magnetic Resonance Angiography (MRA) (Site not responding. Last check: 2007-10-10)
		Magnetic resonance angiography (MRA) is a technique for imaging vascular anatomy and pathology without the use of contrast agents or ionizing radiation.
		MRA is the general term used to describe MR imaging of vascular structures, but when MR is used to image a vein instead of an artery, the term "magnetic resonance venography" (MRV) may be used.
		MRA for evaluation of potential renal donors for the presence of accessory renal arteries is considered investigational as it does not appear to be as beneficial as computed tomography angiography (CTA), which is the established alternative.
	www.regence.com /trgmedpol/radiology/rad08.html (1684 words)

	biology - Magnetic resonance imaging
		Magnetic resonance imaging (MRI) is a method of creating images of the inside of opaque organs in living organisms as well as detecting the amount of bound water in geological structures.
		Magnetic resonance angiography (MRA) is used to generate pictures of the arteries, in order to evaluate them for stenosis (abnormal narrowing) or aneurysms (vessel wall dilatations, at risk of rupture).
		Magnetic resonance spectroscopy (MRS), also known as MRSI (MRS Imaging) and Volume Selective NMR Spectroscopy, is a technique which combines the spatially-addressable nature of MRI with the spectroscopically-rich information obtainable from nuclear magnetic resonance (NMR).
	www.biologydaily.com /biology/MRI (2129 words)

	Articles - Magnetic resonance imaging (Site not responding. Last check: 2007-10-10)
		Magnetic resonance imaging was developed from knowledge gained in the study of nuclear magnetic resonance.
		When the object to be imaged is placed in a powerful, uniform magnetic field, the spins of the atomic nuclei with non-zero spin numbers within the tissue all align in one of two opposite directions: parallel to the magnetic field or antiparallel.
		The main use of MRA is to evaluate the arteries of the neck and brain, the thoracic and abdominal aorta, and the kidneys.
	www.dforever.com /articles/MRI (2760 words)

	Magnetic resonance imaging (Site not responding. Last check: 2007-10-10)
		Magnetic resonance imaging (MRI) is the newest, and perhaps most versatile, medical imaging technology available.
		MRA was developed to study blood flow, while MRS can identify the chemical composition of diseased tissue and produce color images of brain function.
		Magnetic resonance spectroscopy (MRS) is different from MRI because MRS uses a continuous band of radio wave frequencies to excite hydrogen atoms in a variety of chemical compounds other than water.
	www.lifesteps.com /gm/Atoz/ency/magnetic_resonance_imaging.jsp (2742 words)

	Magnetic Resonance Angiogram (MRA)
		Open magnetic resonance image(MRI) machines are now made so that the magnet does not completely surround the person being tested; however, these machines may not be available in all medical centers.
		MRA results may indicate an aneurysm is present when it is not (false-positive).
		It is recommended that an MRA be delayed 6 weeks after the placement of a stent in the coronary arteries of the heart to reduce the risk of movement of the stent by the magnet used in the MRA.
	www.webmd.com /hw/heart_disease/aa155441.asp (1790 words)

	Magnetic Resonance Angiography (MRA)
		Magnetic resonance angiography (MRA) is an application of magnetic resonance imaging (MRI) that provides visualization of blood flow, as well as images of normal and diseased blood vessels.
		MRA and contrast angiography (CA) are not expected to be performed on the same patient for diagnostic purposes prior to the application of anticipated therapy.
		However, these advances in MRA are not significant enough to warrant replacement of pulmonary angiography in the diagnosis of pulmonary embolism for patients who have no contraindication to receiving intravenous iodinated contrast material.
	www.cignamedicare.com /partb/lmrp/tn/cms_fu/2001-04-01.htm (1301 words)

	Magnetic Resonance Angiography (MRA)
		Magnetic resonance angiography (MRA) is a painless diagnostic test that uses a specific sequence of radio signals to produce extremely detailed images of blood flow inside the body.
		It is a type of magnetic resonance imaging (MRI) that looks at the blood vessels and blood flow within the brain and head without injecting any radioactive dyes or inserting a catheter into a blood vessel.
		MRA is used to detect blood clots and aneurysms in the brain, as well as arterial aneurysm and abnormalities in blood vessels that supply the major organs of the body.
	www.hmc.psu.edu /healthinfo/m/mra.htm (651 words)

	Article 7
		The role of conventional angiography as the primary means for demonstrating vascular anatomy in these evaluations is increasingly challenged by the safer, less invasive MR angiography alternatives with no risks of arterial catheterization, ionizing radiation, and contrast nephrotoxicity.
		MR angiography may be performed with a single physician and technician, whereas conventional studies may require one physician, a nurse, a technician, and recovery room personnel.
		For example, in patients with decreased renal function, MRA reveals the stenosis in the iliac artery allowing the interventional radiologist to treat the stenosis with PTA and stent without the contrast toxicity of initial diagnostic angiogram.
	www.xraydocs.com /articles/Article7.html (1014 words)

	Magnetic Resonance Angiography (L5777) (Site not responding. Last check: 2007-10-10)
		MRA is generally covered only to the extent that it is used as a substitute for contrast angiography, except to the extent that there are documented circumstances consistent with this policy that demonstrate the medical necessity of both tests.
		Scientific evidence reveals MRA is considered comparable to CA in determining the extent of AAA, as well as evaluating aortoiliac occlusion disease and renal artery pathology that may be necessary in the surgical planning of AAA repair.
		MRA should be obtained in those circumstances in which using MRA is expected to avoid obtaining CA, when physician history, physical examination, and standard assessment tools provide insufficient information for patient management, and obtaining an MRA has a high probability of positively affecting patient management.
	www.cignamedicare.com /partb/lmrp_lcd/tn/cms_fu/2001-04-04.html (2043 words)

	Magnetic resonance imaging Medical Guide
		Magnetic Resonance Imaging (MRI) is a powerful imaging modality which produces cross sectional tomographic images similar to those produced by computed tomography (CT).
		Image acquisition is based on the physical principles of Nuclear Magnetic Resonance (NMR) which is an apparently safe interaction between radio waves and certain atomic nuclei in the body when they are in the presence of a strong magnetic field.
		Magnetic Resonance Angiography (MRA) is a technique used to evaluate flow and stenotic change in vessels non-invasively.
	www.medicalguidesonline.com /article.asp?id=181 (1067 words)

	Contrast Enhanced MRA and MR Flow Quantification
		MRA shows blood as it travels as distinct from the lumen it is travelling in.
		MRA images optimally display areas of constant flow velocity, but there are many situations where the flow within a voxel has non-uniform speed or direction.
		TOF MRA is acquired with sequential 2DFT slices, 3DFT slabs or multiple overlapping thin 3D FT slabs (MOTSA) depending on the coverage required and the range of flow velocities under examination.
	www.users.on.net /~vision/papers/basicMRA/MRA_Intro.htm (2913 words)

	Magnetic Resonance Imaging Mri (Site not responding. Last check: 2007-10-10)
		Magnetic Resonance Imaging (MRI) is a radiation-free, computer assisted diagnostic technique used to create high quality sectional images of the inside of the body.
		Magnetic resonance imaging (MRI) is a diagnostic technique that uses a magnetic field to produce pictures of structures...
		Magnetic Resonance Imaging (MRI) The magnetic resonance imaging (MRI) scan is a diagnostic tool that currently offers the most sensitive non-invasive way of imaging the brain, spinal cord, or other areas of the body.
	www.mriconsultant.com /magnetic-resonance-imaging-mri.html (671 words)

	Magnetic resonance imaging - cardiac
		Because the strong magnetic fields can displace or disrupt the action of implanted metallic objects, people with cardiac pacemakers cannot be scanned and should not enter the MRI area.
		MRI is sometimes used to avoid the dangers of angiography, repeated exposure to radiation, or exposure to iodinated contrast dye.
		However, because the effects of strong magnetic fields on a fetus are not well documented at this time, pregnant women are usually advised to avoid MRI scans.
	www.dental.am /more/13003_0_14_0_C (1233 words)

	Amazon.com: Coronary Magnetic Resonance Angiography: Books: A.E. Stillman,Andre J. Duerinckx (Site not responding. Last check: 2007-10-10)
		Coronary Maganetic Angiography demystifies coronary MRA for the clinician, using plain language to translate physics into clinical application and bridge the distinct fields of radiology and cardiology.
		The most established and promising coronary MRA techniques are highlighted and reviewed to lead the novice step by step through the use of advanced coronary MRA pulse sequences and strategies.
		Magnetic resonance angiography (MRA) of the coronary arteries became possible in 1991 with the development of a new group of fast magnetic resonance imaging (MRI) sequences.
	www.amazon.com /exec/obidos/tg/detail/-/0387949593?v=glance (523 words)

	Magnetic Resonance Angiography (MRA)
		Magnetic Resonance Angiography (MRA) is similar to Magnetic Resonance Imaging (MRI).
		MRA uses special types of scan sequences to visualize the motion of the blood flowing through your blood vessels.
		Since a strong magnetic field is always present within the scan room, not all patients should undergo an MRA scan.
	www.deaconess.com /body.cfm?id=823 (624 words)

	ThirdAge: Magnetic Resonance Angiography (MRA)
		MRA is a study of the blood vessels using magnetic resonance imaging (MRI).
		MRA produces very detailed two- and three-dimensional images of the blood vessels and other parts of the body by using radio waves in a strong magnetic field instead of using x-rays.
		In some cases, MRA is used instead of catheter angiography or CT angiography, especially for viewing the arteries in the heart and neck.
	www.thirdage.com /healthgate/files/40080.html (843 words)

	Magnetic Resonance Angiography : Update on Applications for Extracranial Arteries -- Yucel et al. 100 (22): 2284 -- ... (Site not responding. Last check: 2007-10-10)
		Assessment of carotid artery stenosis by ultrasonography, conventional angiography, and magnetic resonance angiography: correlation with ex vivo measurement of plaque stenosis.
		MR angiography in the preoperative evaluation of abdominal aortic aneurysms: a preliminary study.
		Magnetic resonance angiography in the preoperative evaluation of abdominal aortic aneurysms.
	circ.ahajournals.org /cgi/content/full/100/22/2284 (8973 words)

	Magnetic Resonance Angiography (Site not responding. Last check: 2007-10-10)
		A carotid artery with 65% occlusion (L) and the corresponding MRA of the same vessel (R).
		Magnetic resonance angiography (MRA) is a new, non invasive technique that can both provide images of arteries and acquire quantitative flow measurements.
		Stenotic arteries are characterized by convective acceleration and turbulence, both of which generate sources of error.
	www.me.gatech.edu /david.ku/mrisim.html (196 words)

	AllRefer Health - MRI (Magnetic Resonance Imaging, Nuclear Magnetic Resonance (NMR) Imaging) - Test/Medical Exams/Tests
		MRI is a non-invasive procedure that uses powerful magnets and radio waves to construct pictures of the body.
		A powerful magnet generates a magnetic field roughly 10,000 times stronger than the natural background magnetism from the earth.
		An MRA, or magnetic resonance angiogram, is a special type of MR that creates three-dimensional reconstructions of vessels containing flowing blood and is often utilized when conventional angiography cannot be performed due to renal failure or other contraindications.
	health.allrefer.com /health/mri-info.html (508 words)

	Magnetic Resonance Angiography (Site not responding. Last check: 2007-10-10)
		Based on the 1st edition this 2nd edition volume provides a completely revised comprehensive overview of the current state of the development in magnetic resonance (MR) vascular imaging.
		The basic principles and technical features of MR angiography are outlined, consideration being given to both flow-dependent and flow-independent contrast-enhanced approaches.
		The well-established approach of providing a clinical overview of MR angiography in different vascular areas has been continued, with the presentation of a large number of and representative MR angiograms based on current acquisition techniques.
	www.stmbooks.co.uk /acatalog/3540650911_M7400.html (144 words)

	Magnetic Resonance Angiography (MRA) (Site not responding. Last check: 2007-10-10)
		An MRA uses a large magnet, radiowaves, and a computer to provide detailed images of the arteries and veins that cannot be obtained with conventional x-rays.
		On the day of your exam, you will be asked to fill out a special questionnaire to ensure that an MRA is a safe procedure for you.
		Next you will be taken to the MRA examination room, where a technologist will help you onto a narrow table.
	www.cinn.org /isc/tests/mra.html (527 words)

	Magnetic Resonance (Site not responding. Last check: 2007-10-10)
		Magnetic resonance imaging of male and female genitals during coitus and female...
		Magnetic Resonance Imaging or MRI - Raymond Damadian - Paul Lauterbur...
		MRI (magnetic resonance imaging) Scanning information produced by medical doctor...
	www.scienceoxygen.com /apparatus/311.html (86 words)

	Magnetic resonance angiogram (MRA)
		A magnetic resonance angiogram (MRA) is a type of MRI scan in which a dye is injected into the bloodstream before the scan is done.
		An MRA scan provides more detail than a basic magnetic resonance image scan.
		It can help detect problems of the arteries and veins, such as a bulge in the wall of an artery (aneurysm), blockage of a blood vessel (by fatty deposits or a blood clot), or a tear in the inner lining of a blood vessel (dissection).
	www.webmd.com /hw/health_guide_atoz/stm159531.asp (135 words)

	Magnetic Resonance Angiography
		This systematic review addresses the cost-effectiveness of magnetic resonance angiography for carotid artery stenosis and peripheral vascular disease.
		Published in April 2002, this review is authored by researchers from UK medical organisations and is aimed at healthcare professionals.
		Published on the Web by the National Coordinating Centre for Health Technology Assessment at the University of Southampton's Wessex Institute for Health Research and Development, this executive summary is in HTML and the full-text monograph is in PDF (requiring Adobe Acrobat Reader).
	omni.ac.uk /browse/mesh/D018810.html (108 words)

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		Magnetic Resonance Angiography : Techniques,indications And Practical Applications
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	www.shop.com /op/aprod-p28980090 (205 words)

	Amazon.com: Magnetic Resonance Angiography: Books: A.L. Baert,I.P. Arlart,G.M. Bongartz,Guy Marchal (Site not responding. Last check: 2007-10-10)
		Amazon.com: Magnetic Resonance Angiography: Books: A.L. Baert,I.P. Arlart,G.M. Bongartz,Guy Marchal
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		Provides a comprehensive overview of the current state of development in magnetic resonance vascular imaging.
	www.amazon.com /exec/obidos/tg/detail/-/3540650911?v=glance (578 words)

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