Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

SSP > Chapter 7. Guidelines in Neuroimaging in Stroke > Flashcards

Chapter 7. Guidelines in Neuroimaging in Stroke Flashcards

1
Q

What is the reason of hyperdensity in NCCT

A

due to increase protein due to clot retraction from globin particle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

5 Early signs of ischemia in NCCT

A
  1. Hyperdense MCA “dot sign”
  2. Obscuration of lentiform nucleus
  3. Loss of gray white matter differentiation
  4. Insular Ribbon Sign
  5. Sulcal Effacement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the explanation of presence of obscuration of lentiform nucleus in acute ischemia

A

Failure of ion pump to maintain cellular homeostasis causing influx of water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the explanation of presence of Hyperdense MCA sign in acute ischemia

A

Clot retraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the least sensitive in early signs in NCCT

A

Hyperdense MCA sign

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

This is define as average time it takes to transit through a volume of brain

A

Mean transit time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

This represent the altered area of the brain risk for infarction

A

Cerebral blood flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What represents the penumbra

A

MTT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Penumbra is defined as

A

Increased MTT
Decreased CBF
Normal to mildly elevated CBV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Infarcted tissue

A

Decreased CBF and CBV

Increased MTT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

CT technique where it is able to identify the core of infarct

A

CTA source imaging (CTA-SI)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

This is a 10 point quantitative CT that determine infarct core volume

A

ASPECTS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

This is based on restricted diffusion of water molecule as a result of movement of extracellular water into intracellular compartment

A

Diffusion weighted imaging

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

This is a random movement of water

A

Brownian Motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The image protocol and creating image of human anatomy is using this method

A

Pulse Sequence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Depicts the area of restricted diffusion as low intensity signal

A

Apparent Diffusion Coefficient

17
Q

Peak duration where ADC continues to decrease its intensity

A

3-5 days

18
Q

What are the sequence in MRI important for dating infarcts

A

DWI
ADC
T2

19
Q

This sequence is sensitive in detecting microbleeds in chronic hypertension

A

GRE

20
Q

What does SWI provides additional information

A

Detect hemorrhage with in infarct
Areas of hypoperfusion
Acute thromboembolic occluding artery

21
Q

What sequence helps to establish the age of infarct

A

T2 and T1

22
Q

Sequence of hemoglobin metabolism in MRI

A

Hyperacute - OxyHgb
Acute - DeoxyHgb
Early Subacute - MethylHgb
Subacute-Chronic - Extracellular Hgb

23
Q

Sequence of intensity of T1 from Acute - Chronic

A

Iso
Iso-Hyper
Hyper
Hyper

24
Q

Sequence of intensity of T2 from Acute - Chronic

A

Hyper
Hypo
Hypo
Hyper

25
Q

Remote bleeds will appear in T2 and T1 imaging

A

Hypointense

26
Q

How many percent will give early signs of infarct in CT-scan during hyperacute stage

A

60%

SSP (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions