Stroke Diagnostics | Questions and Answers
1. A non-enchanced CT can demonstrate ischemic changes within
.: 3 hrs
2. In an AIS a NECT will demonstrate loss of gray-white matter differentiation,
, hypoattentuation of parenchyma and sulcal effacement due to swelling of the gyri:
hypodensity
3. For patients that received IV alteplase repeat CT within_________________________________hours: 24
4. In acute IPH the initial hemorrhage may enlarge or redistribute after the initial NECT:
5. In an SAH the sensitivity of the NCET scan is close to 100% in the first
days after hemorrhage. After to days the rate of negative
scans increases, and other testing must be done to confirm SAH.: 3
; 5-7
6. It is not recommended to undergo a head CT while pregnant, use lead to shield abdomen:
7. A NECT has the ability to show a artery sign: hyperdense
8. What first early sign of brain ischemia that can be seen on an NECT. The thrombus inside the artery is denser
than normal blood: hyperdense artery sign
9. The hyperdense artery sign occurs more frequently in the
artery but it can be seen in more distal branches called the
or in the basilar artery: MCA (middle cerebral artery)
10.This advanced imaging measures the delivery of blood flow to different areas of the brain known as cerebral
blood flow (CBF), cerebral blood volume (CBV), and mean transit time, the amount of time it takes blood to flow
through the vessels. A second injection of contrast is needed.: CT perfusion study
11.CBF is measured in mililiters of blood per 100g of parenchyma per minute:
12.Low CBF values are linked to tissue, as in penumbral cells. Very low CBF's are
considered an area of infarction: hypoperfused
13.If both CBV and CBF are impaired, tissue is unsalvagable and likely to become the : infarct core
14.A CTP can indicate the extent of irreversibly injured brain in the ischemic core and can show the potentially
salvageable : penumbra
15.CTP is not recommended if patient LWK was 6 hours prior, proceeded with the procedure. However if it is
within to of LWK. CT
perfusion IS recommended to aid a patient selection for mechanical thrombec- tomy.: 6-24hrs
16.You may see perfusion abnormalities in patients with chronic migraines, carotid stenosis, and : seizures
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4
1. A non-enchanced CT can demonstrate ischemic changes within
.: 3 hrs
2. In an AIS a NECT will demonstrate loss of gray-white matter differentiation,
, hypoattentuation of parenchyma and sulcal effacement due to swelling of the gyri:
hypodensity
3. For patients that received IV alteplase repeat CT within_________________________________hours: 24
4. In acute IPH the initial hemorrhage may enlarge or redistribute after the initial NECT:
5. In an SAH the sensitivity of the NCET scan is close to 100% in the first
days after hemorrhage. After to days the rate of negative
scans increases, and other testing must be done to confirm SAH.: 3
; 5-7
6. It is not recommended to undergo a head CT while pregnant, use lead to shield abdomen:
7. A NECT has the ability to show a artery sign: hyperdense
8. What first early sign of brain ischemia that can be seen on an NECT. The thrombus inside the artery is denser
than normal blood: hyperdense artery sign
9. The hyperdense artery sign occurs more frequently in the
artery but it can be seen in more distal branches called the
or in the basilar artery: MCA (middle cerebral artery)
10.This advanced imaging measures the delivery of blood flow to different areas of the brain known as cerebral
blood flow (CBF), cerebral blood volume (CBV), and mean transit time, the amount of time it takes blood to flow
through the vessels. A second injection of contrast is needed.: CT perfusion study
11.CBF is measured in mililiters of blood per 100g of parenchyma per minute:
12.Low CBF values are linked to tissue, as in penumbral cells. Very low CBF's are
considered an area of infarction: hypoperfused
13.If both CBV and CBF are impaired, tissue is unsalvagable and likely to become the : infarct core
14.A CTP can indicate the extent of irreversibly injured brain in the ischemic core and can show the potentially
salvageable : penumbra
15.CTP is not recommended if patient LWK was 6 hours prior, proceeded with the procedure. However if it is
within to of LWK. CT
perfusion IS recommended to aid a patient selection for mechanical thrombec- tomy.: 6-24hrs
16.You may see perfusion abnormalities in patients with chronic migraines, carotid stenosis, and : seizures
1/
4
