Computed Tomography Exam 2 (Chapters 7, 8, 9, 10) Questions with Accurate Answers

Computed Tomography Exam 2 (Chapters 7, 8,
9, 10) Questions with Accurate Answers
all of the following are major categories of artifacts except:


a. streaks
b. shading
c. rings and bands
d. noise correct answer d. noise


all of the following can be described as image quality parameters except:


a. high contrast spatial resolution
b. low contrast spatial resolution
c. noise
d. reconstruction parameters correct answer d. reconstruction parameters


all of the following can cause shading artifacts except:


a. beam hardening
b. off-focal radiation
c. improper sampling of data
d. partial volume averagine correct answer c. improper sampling of data


artifacts can (3) correct answer 1. degrade image quality

, 2. affect the perceptibility of detail


3. lead to misdiagnosis


in the window width setting is 200 and the window length is 0, which of the
following occurs:


a. CT numbers greater than +100 appear white


b. CT numbers less than 100 appear gray


c. CT numbers between 0 and +200 appear black


d. only those numbers between +100 and +200 will appear gray correct answer a.
greater than +100 appear white


metallic materials usually present as ___________ artifacts on the image correct
answer streaks


on an image, partial volume artifacts will appear as


1. bands
2. shading
3. streaks