Notes from CT for Technologists - ROMANS Flashcards
1
Q
What is the range of HU numbers?
A
-1000 (air) to +1000 (dense bone)
2
Q
What is another name for ‘raw data’?
A
scan data
3
Q
What is the general range of kVp for CTs?
A
120 - 140 KV
4
Q
What term describes the quantity of Hounsfield units represented as shades of gray on a specific image?
A
Window Width
5
Q
What term describes the center CT value of the window width?
A
Window Level
6
Q
What color will values higher than the selected window width be displayed as?
A
white
7
Q
What color will values lower than the selected window width be displayed as?
A
black
