W12/L3 Flashcards
1
Q
What 3 things affect the absorption of an xray?
A
Thickness of tissue
Density
Atomic number of the tissue (the the 4th power)
2
Q
What do we use to enhance contrast in the GIT?
A
Barium meal/barium enema
3
Q
What does ERCP stand for?
A
Endoscopic retrograde cholangio-pancreatography
4
Q
What is used to enhance contrast in an ERCP?
A
Iodine dye
5
Q
What do we use to enhance contrast in the vessels?
A
Iodine
6
Q
In a CT, absorption is measures in:
A
Hounsfield units
7
Q
Why does an US need gel on the skin surface?
A
It needs to exclude air from between the skin & the transducer, as air bounces the echos back
