Doctor insights on:
Mr Brain And Iac With Contrast
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
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
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
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
MRI with contrast : Yes. This is an acceptable way to visualize the blood vessels of the beain. ...Read more
What areas of brain does "mri brain stem w/o dye" image or cover?Is mra included in above and does it like mra image or look for cerebral aneurysm?
Whole brain stem: The MRI would look at your entire brainstem, shown in the picture. The brainstem is the lower part of your brain that controls breathing and heartrate. An mra (magentic resonance angiogram) is not the same, and would be ordered as a separate test with dye injection. An mra looks at blood vessels for aneurysyms, obstructions, or tears, while an MRI looks for tumors, demyelination, or strokes. ...Read moreSee 1 more doctor answer
Is mra with IV (gadolinium) contrast more accurate in detecting or ruling in or out brain aneurysm than just plain mra without any IV contrast or same
In ruling in or out cerebral aneurysm is mra study enogh or MRI with and without contrast is also needed with mra for better accuracy?
Best tests: Cta and mra studies should readily demonstrate any significant aneurysm. If such a lesion is congenital and small, it may be missed, but ruptures tend to occur when larger than 0.9 mm, and the others would just be followed. If you possess uncontrolled high blood pressure, an acquired aneurysm, called charcot-bouchard, could result in hemorrhage, so watch your bp. ...Read more
Not as crucial: Use of gadolinium is risky if there is kidney problem, as could deteriorate sharply into full failure. In your case, sounds like failure already present which might change amount of contrast to be used, but does not have same adverse effect. Discuss with radiologist, and get an effective study. ...Read moreSee 1 more doctor answer
Highlights: The contrast will flow through the blood stream and highlight structures providing additional information and definition. ...Read more
Stimulants: Stimulants such as Cocaine and amphetamine exert their effects on the user's nervous system and change the user's emotions, behavior, and affects cognition. They may cause miicrovascular ischemic disease of the brain which is unlikely to be detected by MRI or ct scan. ...Read moreSee 1 more doctor answer
Is a 3.0 tesla mra better test than 1.5 tesla mra with and without contrast in detecting and diagnosing 1 to 2 mm cerebral aneurysm(s)?
Yes: magnet strength is highrGet a more detailed answer ›
Contrast difference: Ct uses a combination of xrays shot from multiple directions to look at differences in tissue density. Mri uses strong magnetic fields instead of xrays to differentiate tissues and gives much better contrast than ct. Ct is typically used in the acute setting to see if there is blood or major abnormalities. Mri is a more specific exam to differentiate abnormalities such as stroke or tumor. ...Read more
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