Quiz 5

The typical kilovolt peak (kVp) range used for CT scans is: 90-100. 100-120. 100-140. 120-160.

100-140

Patients taking metformin should stop taking the medication _____ hours after IV contrast media injection. 12 24 48 72

48

50 millisievert (mSv) is equal to: 15 rem. 5 rem. 50 Gy. 100 Gy.

5 rem

The National Council on Radiation Protection and Measurements (NCRP) recommends that the annual occupational dose for imaging professionals not exceed: 1 mSv 5 mSv 50 mSv 1 Sv

50 mSv

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

64

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

70

Which of the following is considered a secondary protective radiation barrier? lead apron thyroid shield CT control room walls protective glasses

CT control room walls

Which of the following most closely approximates the actual radiation dose to a specific patient for a specific exam? dose length product (DLP) multiple scan average dose (MSAD) CTDI

DLP

The CT dose index (CTDI) is most accurate when applied to: single-slice scanners. multislice scanners. helical/spiral scanners.

Single-slice scanner

Radiopaque nonionic contrast agents are considered safe for pregnant patients. True False

True

Which of the following medications may be used to prevent nephrotoxicity? metformin acetylcysteine glucophage diphenhydramine

acetylcysteine

Which of the following medications most likely would be used to treat urticaria (hives)? metformin dopamine naloxone diphenhydramine

diphenhydramine

Which of the following is not a common contrast injection reaction? pain at the injection site metallic taste flushed feeling in the pelvis dyspnea

dyspnea

Which of the following medications may be used to treat bradycardia? epinephrine naloxone soluMedrol diphenhydramine

epinephrine

If extravasation occurs, contrast can be dissipated by reducing its viscosity. This can be accomplished by applying a: hot pack. cold pack. sterile bandage.

hot pack.

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

increases; decreases

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

is not affected.

Compared to barium used for regular fluoroscopy procedures, the barium used for CT procedures is: less dense. more dense. of the same density.

less dense

A pitch of _____ results in the highest dose to the patient. 1 2 less than 1 Pitch does not affect patient dose.

less than 1

Which of the following medications reverses the effects of narcotics? atropine sulfate diphenhydramine dopamine naloxone

naloxone

Which of the following medications most likely would be used to treat chest pain caused by angina? nitroglycerin soluMedrol dopamine naloxone

nitroglycerin

Which of the following devices is the most accurate monitor used to measure occupational radiation exposure? film badge thermoluminescent dosimeter optically stimulated luminescent dosimeter Geiger counter

optically stimulated luminescent dosimeter

Which of the following would normally not be used to administer contrast with a power injector? power PICC line power port-a-cath perma-cath A and B are correct.

perma-cath

Which of the following International System of Units (SI) measurements is associated with monitoring radiology staff? coulomb/kilogram (C/kg) becquerel (Bq) gray (Gy) sievert (Sv)

sievert (Sv)

When using a gonadal shield for a CT exam, the shield should be: placed anteriorly (on top of the pelvis). placed posteriorly (underneath the pelvis). wrapped 360 degrees around the patient. It is not necessary to use gonadal shielding for CT scans.

wrapped 360 degrees around the patient.