Size: 5 1/4 Diameter. 1  Thickness: 5/16. 2  Pore Size: 80ppi. 3  Foam Hardness: 3kpa. 4  Material: Velvet polishing surface with hook and look backing. 5  Color: Purple.
Print this page. A brain aneurysm is usually diagnosed using a magnetic resonance imaging (MRI) scan and angiography (MRA), or a computerised tomography (CT) scan angiography (CTA).An MRI scan is usually used to look for aneurysms in the brain that haven't ruptured.This type of scan uses strong magnetic fields and radio waves to produce detailed images of your brain. CT scan is usually preferred if it's thought the aneurysm has ruptured and there's bleeding on the brain (subarachnoid haemorrhage). This type of scan takes a series of X-rays, which are then assembled by a computer into a detailed three-dimensional image.
According to the guideline, diffusion MRI should be considered more useful than a CT scan for diagnosing acute ischemic stroke within 12 hours of a personâs first stroke symptom.n one large study, among others, that was reviewed for the guideline, stroke was accurately detected 83 percent of the time by MRI versus 26 percent of the time by CT. âSpecific types of MRI scans can help reveal how severe some types of stroke are.