Introduction to Neuroradiology Flashcards
Soft tissues and vasculature of the neck, as well as the neonatal head and spine are often imaged using this modality.
Ultrasound
For neuroimaging, x-rays after used to view what structures?
Skull, vertebra, neck/airway (to identify foreign objects)
When is contrast not needed for a CT/MRI?
Ischemia, altered mental status, headaches
When is contrast warranted on a CT/MRI?
Malignancy, infection, inflammation, vasculitis
True/False. A CT is best to identify acute ischemic stroke.
False. CTs are best for identifying acute hemorrhage, but MRIs are better to identify acute ischemia (less than 3 hours)
How do fluid and fat appear in a T1 MRI?
Fluid is dark, fat is bright
How do fluid and fat appear in a T1 MRI?
Fluid is dark, fat is bright
In this type of MRI, fluid/edema appears bright.
T2 MRI
What is a FLAIR MRI?
In this type of MRI, fluid/edema appears bright.
T2 & FLAIR MRI
What is a FLAIR MRI?
A FLAIR MRI is the same as a T2 MRI, but with CSF suppressed from the image
What imaging study should be conducted to identify acute ischemia? Be specific.
Diffusion/ADC MRI
How do Diffusion and ADR MRIs differ?
Both are used to identify acute ischemia.
On a diffusion MRI, ischemia appears bright. On an ADR MRI, ischemia appears dark.
True/False. MRIs are less commonly used in the ED.
True. CTs are more commonly used in the ER as they are quick and less prone to movement. MRIs may be used to confirm acute strokes or when time is not of the essence
