Midterm Flashcards
What is one extra feature of IR pulse sequence?
TI
What is the TI range for suppressing fat?
80 - 175 (depending on the anatomy)
- 2D VS. 3D :
2D is a slice
3D is a slab (MRA head because arteries are curvy and thinner)
What protocol is used for carotids ?
2D or 3D
Sat pulse for arteries —-
superior
What comes off subclavian arteries?
Vertebral arteries
Internal VS. External carotid arteries:
Internal - supplies blood to the brain; lateral (on coronal view)
External - supplies blood to the face; medial (on coronal view)
What comes off carotid siphon?
Ophthalmic artery
What pulse sequence is used for the venous system?
2D (coronal and axial)
Condition where in the connection between veins and arteries are dilated?
AVM (Arterial Venous Malformation)
What sequence is used for AVM?
Tricks (contrast enhanced)
Sat pulse for veins —-
inferior
What sequence allows you to see the direction of flow?
Phase contrast
What pathology is T2 flair good for?
MS
Diffusion is good for what pathologies?
Stroke, infection, dermoid cyst
What does active/acute stroke look like on diffusion?
Bright (old stroke will be dark; REALLY old stroke will be black because tissue is dead and replaced with CSF)
What sequence confirms if something is a stroke or T2* artifact?
ADC
What does acute stroke look like on ADC?
Dark (old stroke will be bright)
What pathology is GRE good for?
Bleed (also concussion, mv accident, TIA, cavernous malformation)
Multiple dark spots on a GRE is what kind of pathology?
Microbleed
What kind of bleed is on the side of the head and displaces brain tissue?
Subdural hemorrhage (bright on T1)
What is good sequence for the brain post contrast?
T1
What sequence is used post contrast for other parts of the body?
T1 fat sat
What sequence shows lesion as if double dose contrast was given?
MTSE (suppresses background)