Midterm Flashcards
When do you use contrast for a head CT?
Suspicion of tumor, infection, vascular abnormality
What modalities do NOT use radiation?
US
MRI
What is the best modality to examine skull fractures?
Non-contrast CT
What does MRI show in M.S.?
Periventricular plaques
Who is at risk for getting nephrogenic systemic fibrosis?
When does it occur?
Dialysis pts with GFR < 30mL
2 days - 18mo post-exposure
What imaging to use for skull fracture?
CT
What syndrome is associated with hoarseness and compression of the left RLN?
Ortner’s –> Mitral Stenosis
What is a diastolic decrescendo murmur in the 3rd ICS LSB?
AR
What is unequal size of pupils called?
Anisocoria
How far away should a patent hold a chart (NOT the snellen chart) when doing an eye exam?
6 feet
HSV1 causes brain infections where?
Inferior and medial temporal lobes
Gradient across valve in AS is significant if greater than what?
Obstruction leads to what?
50
Pressure overload, LVH
Which visual field must be tested separately?
Nasal field
If you have trouble seeing far away, what kind of vision abnormality do you have?
Myopia
If you have a pt with M.S., a tumor, or a CVA, what imaging modality do you want to use?
MRI w/contrast
What are the diastolic murmurs?
AR, PR
MS, TS
Atrial myxoma
What tumor is benign and derived from Rathke’s pouch?
Also most common supratentorial tumor?
Craniopharyngioma
What imaging assesses hemodynamics via soundwaves?
Doppler
Chronic cause of AR?
Syphilis, ankylosing spondylitis
T2 weighted image: describe the TR and TE
What appears bright white on image?
Long TR and TE
Compartments filled with H2O
What is a duplex a combination of?
Traditional and doppler US
What imaging to diagnose an uncal herniation?
MRI
Concussion mainly results in damage to what?
White matter tracts
Diffuse axonal injury
Pulmonic valve listening post?
Left 2nd ICS at SB