Question

If a calcification with a CT number of 300 appears pure white on an image, which of the following could be the window width and window level selected?

1) wl = 0, ww = 500
2) wl = 300, ww = 500
3) wl = 100, ww = 1000

Answer 1

The appropriate window width and window level for a calcification with a CT number of 300 to appear pure white on an image is wl = 300, ww = 500.

Step-by-step explanation:

The window width and window level selected determine the displayed range of CT numbers in an image. A window width of 500 and window level of 300 means that the range of CT numbers displayed on the image is centered around 300 and extends 250 units on either side (300±250). So, a calcification with a CT number of 300 would appear white on such an image.

Based on this information, option 2) wl = 300, ww = 500 would be the appropriate window width and window level for the calcification to appear pure white.