CT Mock Board
a - Answer-In the CT setting, which describes the concept of basic (or simple) consent?
a. Before the CT examination, the technologist explains the procedure to the patient and asks them if
they agree.
b. A written document is given to the patient or guardian (or read to them, if necessary). The document
lists all of the potential complications of the procedure. The patient must sign the form to acknowledge
that they understand both the risks and benefits of the examination.
c. Consent that is inferred from signs or action. For example, if a patient holds out his arm so that you
can start an IV line, it can be implied that he gives his consent to the procedure.
d. The requirement that, for minors, one or more parent must consent to the procedure.
b - Answer-A patient is being scheduled for a CT exam of the neck. The patient also needs a number of
other diagnostic exams. Which of the following exams may affect the date scheduled for the CT study?
a. Upper GI
b. Nuclear medicine thyroid scan
c. MR abdomen and pelvis examination
d. Doppler ultrasound of the lower extremity
,a - Answer-All of the following are reasons for obtaining a history before a CT exam is performed
EXCEPT:
a. to verify the patient has not exceeded his radiation limit
b. to select the appropriate protocol
c. to be sure the exam can be performed safety
d. to aide the radiologist in his or her interpretation of the CT exam
b - Answer-What is a general rule regarding the administration of IV contrast media to patients
receiving dialysis?
a. Patients on dialysis should never be given contrast media.
b. Patient on dialysis who still have some residual kidney function should not be given contrast media;
patients with end-stage renal failure can be given contrast media.
c. When contrast media is given, dialysis must be scheduled to be performed within 4 hours.
d. Contrast media poses no risks to patients on dialysis
c - Answer-In many institution a radiologist is consulted before intravenous contrast medium is
administered to patients in whom the creatinine value is greater than:
a. 0.4 mg/dL
b. 0.8 mg/dL
c. 2.0 mg/dL
d. 8.0 mg/dL
a - Answer-You complete the CT exam and will remove the IV catheter. Which of the following
medications may necessitate holding pressure on the puncture site for a longer period?
a. Coumadin
b. Benadryl
,c. Tylenol
d. Synthroid
d - Answer-In what circumstances is it acceptable to use a large-bore tunneled dialysis catheter for the
injection of iodinated contrast media?
a. Whenever a standard peripheral IV access is not available
b. When the contrast flow rate is 2 mL/s or less
c. When the patency of the line has been verified by flushing with saline
d. A dialysis catheter should never be used for contrast media administration
d - Answer-Documentation of IV contrast administration is
a. only necessary when an adverse event occurs
b. only necessary when routine injection parameters are modified
c. required on all patients and must be cosigned by a radiology
d. required on all patients and should include the name of the agent, the dose, the flow rate, and the
injection site.
c - Answer-Which is a TRUE statement regarding venipuncture in a peripheral vein for the placement of
an IV line for a CT coronary angiogram?
a. A 22-gauge butterfly infusion set should be used
b. An 18-gauge straight needle should be used
c. An indwelling catheter set with a flexible plastic cannula should be used, preferably 20-gauge or larger
d. A Huber needle should be used
c - Answer-Automated injection triggering methods are used to
a. simplify the process of contrast injection, so that assistants can perform the task and patient
throughput can be increased
, b. improve patient safety by reducing contrast extravasations
c. effectively accommodate for individual differences in circulation time by adjusting the scan delay
d. effectively accommodate for individual differences in circulation time by adjusting the contrast flow
rate
b - Answer-In what phase of tissue enhancement is the iodinated contrast in Figure 24-1?
a. Noncontrast
b. Bolus
c. Nonequilibrium
d. Equilibrium
c - Answer-Which of the following is TRUE of an ionic contrast medium?
a. All ionic contrast media have highly osmolality
b. Ionic contrast media are typically more expensive than the nonionic types
c. The molecules in an ionic contrast solution dissociate to form ions in water
d. Ionic contrast agents have fewer particles in solution than nonionic agents
c - Answer-What property of IV contrast media is responsible for its capacity to increase a structure's
ability to attenuate the x-ray beam?
a. Osmolality
b. Viscosity
c. Iodine concentration
d. Ionic nature
b - Answer-In performing CT colonography, which is an advantage of CO2 over room air?
a. Only CO2 can provide reliable colonic distention
a - Answer-In the CT setting, which describes the concept of basic (or simple) consent?
a. Before the CT examination, the technologist explains the procedure to the patient and asks them if
they agree.
b. A written document is given to the patient or guardian (or read to them, if necessary). The document
lists all of the potential complications of the procedure. The patient must sign the form to acknowledge
that they understand both the risks and benefits of the examination.
c. Consent that is inferred from signs or action. For example, if a patient holds out his arm so that you
can start an IV line, it can be implied that he gives his consent to the procedure.
d. The requirement that, for minors, one or more parent must consent to the procedure.
b - Answer-A patient is being scheduled for a CT exam of the neck. The patient also needs a number of
other diagnostic exams. Which of the following exams may affect the date scheduled for the CT study?
a. Upper GI
b. Nuclear medicine thyroid scan
c. MR abdomen and pelvis examination
d. Doppler ultrasound of the lower extremity
,a - Answer-All of the following are reasons for obtaining a history before a CT exam is performed
EXCEPT:
a. to verify the patient has not exceeded his radiation limit
b. to select the appropriate protocol
c. to be sure the exam can be performed safety
d. to aide the radiologist in his or her interpretation of the CT exam
b - Answer-What is a general rule regarding the administration of IV contrast media to patients
receiving dialysis?
a. Patients on dialysis should never be given contrast media.
b. Patient on dialysis who still have some residual kidney function should not be given contrast media;
patients with end-stage renal failure can be given contrast media.
c. When contrast media is given, dialysis must be scheduled to be performed within 4 hours.
d. Contrast media poses no risks to patients on dialysis
c - Answer-In many institution a radiologist is consulted before intravenous contrast medium is
administered to patients in whom the creatinine value is greater than:
a. 0.4 mg/dL
b. 0.8 mg/dL
c. 2.0 mg/dL
d. 8.0 mg/dL
a - Answer-You complete the CT exam and will remove the IV catheter. Which of the following
medications may necessitate holding pressure on the puncture site for a longer period?
a. Coumadin
b. Benadryl
,c. Tylenol
d. Synthroid
d - Answer-In what circumstances is it acceptable to use a large-bore tunneled dialysis catheter for the
injection of iodinated contrast media?
a. Whenever a standard peripheral IV access is not available
b. When the contrast flow rate is 2 mL/s or less
c. When the patency of the line has been verified by flushing with saline
d. A dialysis catheter should never be used for contrast media administration
d - Answer-Documentation of IV contrast administration is
a. only necessary when an adverse event occurs
b. only necessary when routine injection parameters are modified
c. required on all patients and must be cosigned by a radiology
d. required on all patients and should include the name of the agent, the dose, the flow rate, and the
injection site.
c - Answer-Which is a TRUE statement regarding venipuncture in a peripheral vein for the placement of
an IV line for a CT coronary angiogram?
a. A 22-gauge butterfly infusion set should be used
b. An 18-gauge straight needle should be used
c. An indwelling catheter set with a flexible plastic cannula should be used, preferably 20-gauge or larger
d. A Huber needle should be used
c - Answer-Automated injection triggering methods are used to
a. simplify the process of contrast injection, so that assistants can perform the task and patient
throughput can be increased
, b. improve patient safety by reducing contrast extravasations
c. effectively accommodate for individual differences in circulation time by adjusting the scan delay
d. effectively accommodate for individual differences in circulation time by adjusting the contrast flow
rate
b - Answer-In what phase of tissue enhancement is the iodinated contrast in Figure 24-1?
a. Noncontrast
b. Bolus
c. Nonequilibrium
d. Equilibrium
c - Answer-Which of the following is TRUE of an ionic contrast medium?
a. All ionic contrast media have highly osmolality
b. Ionic contrast media are typically more expensive than the nonionic types
c. The molecules in an ionic contrast solution dissociate to form ions in water
d. Ionic contrast agents have fewer particles in solution than nonionic agents
c - Answer-What property of IV contrast media is responsible for its capacity to increase a structure's
ability to attenuate the x-ray beam?
a. Osmolality
b. Viscosity
c. Iodine concentration
d. Ionic nature
b - Answer-In performing CT colonography, which is an advantage of CO2 over room air?
a. Only CO2 can provide reliable colonic distention
