W8/L4: Thorax imaging Flashcards
1
Q
What does CT stand for?
A
Computer tomography
2
Q
What’s the name of the units we use for quantifying the density of tissue?
A
Hounsfield units
3
Q
What Hounsfield unit is water worth?
A
0
4
Q
What Hounsfield unit is air worth?
A
-1000
5
Q
What are the advantages that a CT chest has over CXR?
A
Better spacial resolution
Better contrast discrimination
6
Q
What are the advantages CXR has over CT chest?
A
Less radiation
Much cheaper
7
Q
When we look at transverse sliced on a chest xray, where are we “standing”?
A
At the feet, looking up
