Neuroradiology Flashcards
*Why do we need imaging in stroke?
T.Ei.B.E.R
1-to know reason of stroke
2-to eliminate bleeding
3-to determine the extent of infarction
4-to know etiology
5-Treatment
Most common type of stroke?
Ischemic
Which scanning method is used in brain stroke?
Non-contrast CT
Which scan can distinguish between infarct and hemorrhage?
Non-contrast CT
Which scan detect early infarcts in brain?
Diffuse weighted MRI
Which scan detects fractures and hemorrhage[hematoma] in brain?
Non-contrast CT
**which type of hematoma has a crescent shape ),
CAN cross sutures,
Can cross Falx and Tentorium
Subdural hematoma
** **which type of hematoma has a Biconvex shape (),
CANNOT cross sutures,
Can cross Falx and Tentorium
Epidural hematoma
Which type of hematoma is from middle meningeal artery/vein?
Epidural hematoma
What is the most common cause and location of epidural hematoma?
90% skull fracture, mostly in temporal bone
What are the most common causes of subarachnoid hemorrhage?
1-Aneurysm rupture
2-trauma
What is seen on a CT in a pt with subarachnoid hemorrhage?
Hyper-density in sulci,cisternae and ventricules
Hypo-dens brain=
Infarct
Hyper-dens brain=
Hemorrhage
**Which brain injury is indicated for use of MRI on it
Diffuse axonal injury
Which scan do you use in penetrating injuries?
CT (not MRI due to possible metal present)
What is the primary imaging method in intracranial tumors?
MRI
What are the indications for CT in head trauma?
(NA>60SCNT)
1-nausea/vomiting/headache
2-seizures
3->60 yrs
4-alcohol/drug
5-neck trauma
6-coagulation disorders
When is mechanical thrombectomy indicated in stroke patients?
The thrombus can be removed if onset of symptoms of stroke is less than 6 hours
Which MRI is the best at detecting early acute infarcts?
Diffusion weighted MRI
How do you determine PENUMBRA;the tissue at risk of stroke?
By determining the cerebral reserve capacity
What is the approach to hemorrhagic transformation[complication of ischemic stroke]?
Heparinization tx
