Doctor insights on:
Mri Angiography Of Brain
Maybe safer in some: Gadolinium contrast could potentially cause kidney complications on rare occasion. Mri without contrast will reveal areas of atrophy, stroke, bleeding, tumors, hydrocephalus, etc, but will not clearly show certain ms lesions, aneurysms, avm's, some inflammatory problems, so, always discuss with your doctor as to why an ordered MRI might be done in a variety of ways. ...Read moreSee 2 more doctor answers
Magnetic resonance imaging named for the effects of the strong magnetic field upon the atomic and molecular phase or spin and the image created when that magnetic field is altered and the excited particle changes gibing off a signal that is recorded and interpreted by a complex computer algorithm, ...Read more
Depends: I believe you are asking which is better, MRI of the brain or mr angiography. An MRI of the brain details the structure and morphology of the brain as well as whether there is evidence of infarct (stroke), demyelination (ms) or a mass. Mr angiography details the arterial vessels to evaluate for aneurysm or vascular disease. They are often performed together. ...Read moreSee 1 more doctor answer
Nope: Sometimes you can see evedence of bleeding. With traumatic brain injury sufficient to cause changes on ct typically survival is markedly reduced. Certain types of MRI done at the right time following a brain injury can sometimes show evidence of cerebral contusion. Much of the damage done with traumatic brain injury is microscopic (too small even with diffuse axonal injury) to be seen on mri. ...Read more
No: The x ray radiation in a CT has no measurable or known effect on neural tissues. 1) dose is way too low and 2) nerves are relatively radioresistant since the cells don't reproduce very fast, if at all. There is a theoretical risk of cataracts and cancer years later, but this is incredibly small esp. for a single scan and controversial anyway. ...Read moreSee 1 more doctor answer
Merely technical: Looking directly at base of brain and pituitary requires slightly different cuts and angles, as the focus is directed to a small area of brain, but the software and pictures are handled in a similar fashion. In ms, we tend to use specialized approaches, such as flair or double inversion recovery to see the white matter spots better. Not needed for pituitary views, usually. ...Read more
Brain MRI says satisfactory intraluminal signal is noted in distal carotid vertebral and basilar arteries. Unremarkable brain MRA. What does this mean?
Normal vessels.: means normal vessels.Get a more detailed answer ›
Several factors: One of the factors is the distribution of the infarct. The arteries of the brain have a very well-defined territory that they supply and venous infarcts may not be isolated to one of those territories. Also, there may be direct or indirect evidence on a noncontrast ct or MRI that suggest occlusion of one of the major venous structures. Clinical history is also considered. ...Read moreSee 1 more doctor answer
Echocardiogram results indicate an avm. Ct scan of chest and MRI & mra of brain are still negative. Where else might the avm be?
Anywhere: Arteriovenous malformation or avm is an abnormal connection between arteries and veins, bypassing the capillary system. The congenital vascular anomaly occurs commonly in the central nervous system, but can appear in any location. Although many avms are asymptomatic, they can cause intense pain or bleeding or lead to other serious medical problems. ...Read more
Headaches somewhat frequently. MRI brain normal. Go for MRA Brain or MR Spectroscopy of the brain? or MRI other parts? I get free MRI/MRA services.
MRA for h/a: MRA would show even small aneurysms, so if you are concerned it may add some additional information about the vessels, including small or stenotic vessels and the carotids. Also consider thyroid, diabetes, musculoskeletal strain ,eyestrain from computer, allergies,sinusitis, food intolerances ( MSG is classic), mitral valve prolapse,hydrocephalus should have been seen on MRI,and migraines. ...Read more
Only if large enough: MRI with contrast has a resolution limit of about 5 mm, depending on the field strength of the magnet & the spin sequence performed (resolution of time-of-flight MRI or TOF-MRI is even worse). The "gold standard" for an aneurysm is a fluoroscopic angiogram of the brain, which only interventional neurologists or radiologists perform 4 (1) known stroke or (2) genetics. Use HealthTap Prime to discuss ...Read more
Also, very fast!: Agree with excellent answer above. Additionally, ct scans have the advantage of being much faster than MRI scans, and they are much more widely available- if you come into a small hospital's er at 3 in the morning, they will likely be able to do a ct immediately, while an MRI might wait until the next morning (if it is available at all!). ...Read moreSee 3 more doctor answers
encompasses several medical imaging tests that visualize the anatomy and pathology of blood vessels. Standard angiography involves catheterizing a vessel and injecting contrast under X-ray visualization. Less invasive angiographic techniques include MR angiography ...Read more