CT Module 5

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

a. dose length product (DLP)

Which of the following medications may be used to treat bradycardia? a. epinephrine b. nalxone c. soluMedrol d. diphenhydramine

a. epinphrine

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. perphillary inserted central catheter (PICC) line

a. hot pack

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

a. less dense

Which of the following medications most likely would be used to treat chest pain caused by angia? a. nitroglycein b. soluMedrol c. dopamine d. naloxone

a. nitroglycerin

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

a. single-slice scanners

Radiopaque nonionic contrast agents are considered safe for pregnant patients. a. true b. false

a. true

50 millisievert (mSv) is equal to: a. 15 rem. b. 5 rem. c. 50 Gy. d. 100 Gy.

b. 5 rem

Which of the following medications may be used to prevent nephtotoxicity? a. metformin b. acetylecysteine c. glucophage d.diphenhydramine

b. acetylecysteine

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

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

c. 48

The National Council on Radiation Protection (NRCP) 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

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

c. CT control room

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

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

c. optically stimulated luminescent dosimeter

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

c. perma-cath

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

c. wrapped 360 degrees around the patient.

ACT 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 medications most likely would be used to treat uritcaria (hives)? a. metformin b. dopamine c. naloxone d. diphenhydramine

d. diphehydramine

Which of the following is not a common contrast injection reaction? a. pain at the injection site b. metallic taste c. flushed feeling in the pelvis d. dyspenia

d. dyspenia

Which of the following medications reverses the effects of narcotics? a. atropine sulfate b. diphenhydramine c. dopamine d. naloxone

d. naloxone

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)