1.) What radiation safety principles are used to minimize radiation dose in ALARA?
a. Film badges
b. Time, Distance, Shielding
c. Gloves, Mask, Gown
d. SID, SSD, OID
2.) Beam hardening is a form of?
a. Filtration
b. Collimation
c. Image Intensification
3.) What technology eliminates the need for cables and allows for continuous gantry rotation?
a. Scanogram
b. Slip ring
c. Cross talk
4.) What can motion contribute on an image?
a. Beam hardening
b. Step artifact
c. Blurriness
d. Increased dose
e. b & c
5.) What factors are used to reduce patient dose?
a. Increase mA
b. Increase pitch
c. Decrease mA
d. b & c
6.) Which CT scanner system reduces patient radiation dose if the pitch is greater than one?
a. MSCT
b. SSCT
7.) What is the average exposure from a CT …show more content…
1988
b. 1990
c. 1993
10.) Equipment factors affecting image quality?
a. Reconstruction algorithm
b. KVP
c. mAs
d. scanner geometry
e. bowtie filters
f. a,d,e
g. a,b,c
11.) What is the Hounsfield number for blood?
a. 50 HU
b. 40 HU
c. 0 HU
d. 97 HU
12.) There are numerous shades of grey, how many can the human eye see?
a. 50
b. 20
c. 256
d. 10
13.) What is quality assurance?
a. The Standard Deviation test
b. The brightness of an image.
c. Procedure performed periodically to assure that a set level of quality as specified by the manufacturer has not been compromised.
d. a & c
14.) Metal artifacts will leave streaking on the image and to resolve the issue_____________.
a. Increase kVp
b. Remove hardware
c. Angle gantry
d. b & c
15.) How do you reduce/ eliminate noise of a CT image?
a. Increase slice thickness
b. Increase mAs, kVp
c. Decrease kVP, mAs
d. a and b
e. a and c
16.) When scanning facial bones increased spatial resolution is acquired by?
a. Thinner slices
b. Thicker slices
c. Smoothing filter
d. High kVp
e. a and d
f. b and d
17.) When scanning pediatric patients dose is very important. What factors positively affect pediatric dose?
a. Increased mAs
b. Decreased kVp
c. Multiphase scans
d. Dose