CT - Mod 7: HW

If extravasation occurs, contrast can be dissipated by reducing its viscosity. This can be accomplished by applying a a. hot pack b. cold pack c. sterile bandage d. peripherally inserted central catheter (PICC) line

a. hot pack

Generally, the typical kilovolt peak (kVp) range used for CT scans is: a. 90-100 b. 100-120 c. 100-140 d. 120-160

c. 100-140

The national council on radiation protection and measurements (NCRP) recommends that the annual occupational dose for imaging professionals not exceed a. 1 mSv b. 5 mSv c. 50 mSv d. 1 Sv

c. 50 mSv

For CT scanning, as mAs increases, patient dose _____ and image noise _____ a. decreases; decreases b. increases; increases c. increases; decreases d. decreases; increases

c. increases; decreases

As the display field of view increases, the resulting radiation dose to the patient a. decreases b. increases c. is not affected

c. is not affected

A pitch of _____ results in the highest dose to the patient a. 1 b. 2 c. less than 1 d. pitch does not affect patient dose

c. less than 1

A CT scanner with 16 detector rows, each scanning 4 widths, is called a _____ -slice scanner. a. 4 b. 8 c. 16 d. 64

d. 64

Gating is a technique that can effectively reduce patient dose by as much as _____% a. 100 b. 90 c. 80 d. 70

d. 70

Which of the following international system of units (SI) measurements is associated with monitoring radiology staff? a. coulomb/kilogram (C/kg) b. Becquerel (Bq) c. gray (Gy) d. Sievert (Sv)

d. Sievert (Sv)