How accurate is a CT angiogram brain?

CTA detected large arterial occlusion with 100\% sensitivity and specificity. For detection of >or=50\% stenosis, CTA had 97.1\% sensitivity and 99.5\% specificity. To detect all lesions >or=50\% as determined by DSA, the cut off point on CTA appeared to be at >or=30\%, with a false-positive rate of 2.4\%.

How accurate is CT angiography in evaluating intracranial atherosclerotic disease?

CTA detected large arterial occlusion with 100\% sensitivity and specificity. For detection of ≥50\% stenosis, CTA had 97.1\% sensitivity and 99.5\% specificity. To detect all lesions ≥50\% as determined by DSA, the cut off point on CTA appeared to be at ≥30\%, with a false-positive rate of 2.4\%.

What does CT angiogram of brain show?

A CT scanner uses a combination of a high-tech X-ray scanner and sophisticated computer analysis to provide detailed, 3D images of the blood vessels in your body, such as those in the brain, neck, kidneys and legs. It can be used to identify weakened sections of arteries or veins and to visualize blood flow.

Can a CT angiogram detect a brain tumor?

Magnetic resonance imaging (MRI) and computed tomography (CT) scans are used most often to look for brain diseases. These scans will almost always show a brain tumor, if one is present.

Can you see a brain aneurysm on a CT scan?

Brain aneurysms can be diagnosed by several imaging tests, though an unruptured brain aneurysm also may be found while undergoing brain imaging — such as MRI or CT scan — or a medical evaluation for another reason, such as an evaluation for headaches or other neurological symptoms.

How accurately does computed tomography detect an aneurysm of the brain?

Cerebral CT angiography had excellent diagnostic accuracy (95.8\% [1128 of 1178] and 96.0\% [1132 of 1179] for two readers, respectively) for detection of small intracranial aneurysms with a per-aneurysm analysis compared with digital subtraction angiography.

What is the prognosis for a brain aneurysm?

A sudden, severe headache with or without stroke symptoms could be a sign of a brain aneurysm. A ruptured brain aneurysm is a serious, life-threatening condition that needs immediate medical attention and emergency treatment.