Mosby's CT Registry
Mosby's CT Registry Review 3rd Edition:
Practice Exam with 100% Correct Answers 2025
The use of water as an oral contrast material for CT of the abdomen and/or pelvis has
several potential advantages, including:
1. increased palatability and improved pt comfort
2. better demonstration of enhancing bowel wall
3. no interference with 3D applications -Correct Answer ✔1, 2, and 3
The use of water as a neg contrast agent is becoming increasingly common for many
CT applications for the abdomen and pelvis
A pt's BP is measured 140/70 mm Hg. The number 140 represents:
a. pressure within arterial vessels during contraction of the heart
b. pressure exerted on the chambers of the heart while it is relaxed
c. pressure within the arterial vessels while heart is relaxed
d. pressure exerted on the chambers of the heart during a contraction -Correct Answer
✔the pressure within arterial vessels during contraction of the heart
A(n) ___ CM may be described as one that does not dissociate into charged particles in
a solution. -Correct Answer ✔nonionic
Ionic contrast materials are salts that form independent particles in aqueous solutions.
Nonionic contrast materials don't dissociate into charged particles (ions) when placed in
solution.
Proper immobilization during a CT procedure may involve the use of:
1. soft, hook-and-loop (Velcro) immobilization straps
2. adhesive medical tape
3. good pt communication -Correct Answer ✔1 and 3 only
The normal range of GFR for men is:
a. 50 +/- 14 mL/min/m^2
b. 60 +/- 10 mL/min/m^2
c. 70 +/- 14 mL/min/m^2
d. 80 +/- 10 mL/min/m^2 -Correct Answer ✔70 +/- 14 mL/min/m^2
Normal GFR for women is: 60 +/- 10 mL/min/m^2
Risk factors for contrast-induced nephrotoxicity (CIN) include:
1. diabetes
2. advanced age
3. hematuria -Correct Answer ✔1 and 2 only
Mosby's CT Registry
,Mosby's CT Registry
Risk factors for CIN include preexisting compromise of renal function, dehydration,
diabetes, myeloma, advanced age, and cardiovascular disease.
The reduction in number of infectious organisms w/o a complete elimination is termed:
a. medical asepsis
b. sterilization
c. surgical asepsis
d. immunization -Correct Answer ✔medical asepsis
accomplished through the use of soap, water, and many other types of disinfectant
materials
Which of the following is preferred range for pt heart rate for optimal cardiac studies?
a. 65-75 bpm
b. 75-85 bpm
c. 85-95 bpm
d. greater than 100 bpm -Correct Answer ✔65-75 bpm
pts with slower heart rates exhibit longer diastolic phases, which yield higher-quality
cardiac CT exams. The preferred heart rate for optimal imaging on most MDCT systems
is 65 bpm. Newer systems at the 64-slice level and beyond are capable of acquiring
adequate cardiac CT images at higher heart rates.
Urticaria is another term for: -Correct Answer ✔hives
Which of the following type(s) of oral CM could cause peritonitis if leakage from the
digestive tract occurs from perforation?
a. iopamidol (Gastrografin)
b. barium sulfate
c. diatrizoate (Hypaque)
d. effervescent granules -Correct Answer ✔barium sulfate
barium sulfate is not water soluble and is not easily absorbed by the body. If it leaks out
of the digestive tract because of perforation, this agent may cause peritonitis
Which of the following is not an advantage of an automatic power injector over the
manual bolus method of IV contrast agent administration?
a. uniform contrast enhancement throughout the exam
b. consistent contrast agent admin for all pts.
c. decreased risk of CIN
d. shorter injection times -Correct Answer ✔decreased risk of CIN
Which of the following is/are severe adverse reactions to iodinated IV contrast media?
1. anaphylaxis
2. urticaria
3. vomiting -Correct Answer ✔1 only
Mosby's CT Registry
, Mosby's CT Registry
severe reactions to IV CM include anaphylaxis, shock, cardiac arrest, and death.
Which of the following lab values is the most dependable measure of renal function?
a. BUN
b. creatinine
c. PT
d. PTT -Correct Answer ✔creatinine
Which of the following angiocatheter sizes may be safely used for the automated power
injection of iodinated contrast agents at flow rates higher than 3mL/sec?
1. 18 gauge
2. 20 gauge
3. 22 gauge -Correct Answer ✔1 and 2 only
22 gauge angiocatheters are sufficient for flow rates up to 3mL/sec. 20 gauge or larger
angiocatheters should be utilized whenever flow rates exceed 3mL/sec.
Which of the following portions of the ECG corresponds to the period of atrial systole?
a. P wave
b. QRS complex
c. alpha wave
d. T wave -Correct Answer ✔P wave
Which of the following terms is used to describe the IV injection of medication or
contrast agent in one complete dose over a short time? -Correct Answer ✔bolus
Used in determining the biologic effect of iodinated CM, the term ___ refers to the
number of ions formed when a substance dissociates in a solution.
a. solubility
b. osmolality
c. concentration
d. iodination -Correct Answer ✔osmolality
also described as the number of particles in solution per kg of water.
The injection rate of an automatic injector is set at 1.5 mL/sec. What is the injection time
for a contrast agent vol of 150 mL?
a. 60 sec
b. 90 sec
c. 100 sec
d. 120 sec -Correct Answer ✔100 sec
Divide contrast age vol by the flow rate.
Mosby's CT Registry
Mosby's CT Registry Review 3rd Edition:
Practice Exam with 100% Correct Answers 2025
The use of water as an oral contrast material for CT of the abdomen and/or pelvis has
several potential advantages, including:
1. increased palatability and improved pt comfort
2. better demonstration of enhancing bowel wall
3. no interference with 3D applications -Correct Answer ✔1, 2, and 3
The use of water as a neg contrast agent is becoming increasingly common for many
CT applications for the abdomen and pelvis
A pt's BP is measured 140/70 mm Hg. The number 140 represents:
a. pressure within arterial vessels during contraction of the heart
b. pressure exerted on the chambers of the heart while it is relaxed
c. pressure within the arterial vessels while heart is relaxed
d. pressure exerted on the chambers of the heart during a contraction -Correct Answer
✔the pressure within arterial vessels during contraction of the heart
A(n) ___ CM may be described as one that does not dissociate into charged particles in
a solution. -Correct Answer ✔nonionic
Ionic contrast materials are salts that form independent particles in aqueous solutions.
Nonionic contrast materials don't dissociate into charged particles (ions) when placed in
solution.
Proper immobilization during a CT procedure may involve the use of:
1. soft, hook-and-loop (Velcro) immobilization straps
2. adhesive medical tape
3. good pt communication -Correct Answer ✔1 and 3 only
The normal range of GFR for men is:
a. 50 +/- 14 mL/min/m^2
b. 60 +/- 10 mL/min/m^2
c. 70 +/- 14 mL/min/m^2
d. 80 +/- 10 mL/min/m^2 -Correct Answer ✔70 +/- 14 mL/min/m^2
Normal GFR for women is: 60 +/- 10 mL/min/m^2
Risk factors for contrast-induced nephrotoxicity (CIN) include:
1. diabetes
2. advanced age
3. hematuria -Correct Answer ✔1 and 2 only
Mosby's CT Registry
,Mosby's CT Registry
Risk factors for CIN include preexisting compromise of renal function, dehydration,
diabetes, myeloma, advanced age, and cardiovascular disease.
The reduction in number of infectious organisms w/o a complete elimination is termed:
a. medical asepsis
b. sterilization
c. surgical asepsis
d. immunization -Correct Answer ✔medical asepsis
accomplished through the use of soap, water, and many other types of disinfectant
materials
Which of the following is preferred range for pt heart rate for optimal cardiac studies?
a. 65-75 bpm
b. 75-85 bpm
c. 85-95 bpm
d. greater than 100 bpm -Correct Answer ✔65-75 bpm
pts with slower heart rates exhibit longer diastolic phases, which yield higher-quality
cardiac CT exams. The preferred heart rate for optimal imaging on most MDCT systems
is 65 bpm. Newer systems at the 64-slice level and beyond are capable of acquiring
adequate cardiac CT images at higher heart rates.
Urticaria is another term for: -Correct Answer ✔hives
Which of the following type(s) of oral CM could cause peritonitis if leakage from the
digestive tract occurs from perforation?
a. iopamidol (Gastrografin)
b. barium sulfate
c. diatrizoate (Hypaque)
d. effervescent granules -Correct Answer ✔barium sulfate
barium sulfate is not water soluble and is not easily absorbed by the body. If it leaks out
of the digestive tract because of perforation, this agent may cause peritonitis
Which of the following is not an advantage of an automatic power injector over the
manual bolus method of IV contrast agent administration?
a. uniform contrast enhancement throughout the exam
b. consistent contrast agent admin for all pts.
c. decreased risk of CIN
d. shorter injection times -Correct Answer ✔decreased risk of CIN
Which of the following is/are severe adverse reactions to iodinated IV contrast media?
1. anaphylaxis
2. urticaria
3. vomiting -Correct Answer ✔1 only
Mosby's CT Registry
, Mosby's CT Registry
severe reactions to IV CM include anaphylaxis, shock, cardiac arrest, and death.
Which of the following lab values is the most dependable measure of renal function?
a. BUN
b. creatinine
c. PT
d. PTT -Correct Answer ✔creatinine
Which of the following angiocatheter sizes may be safely used for the automated power
injection of iodinated contrast agents at flow rates higher than 3mL/sec?
1. 18 gauge
2. 20 gauge
3. 22 gauge -Correct Answer ✔1 and 2 only
22 gauge angiocatheters are sufficient for flow rates up to 3mL/sec. 20 gauge or larger
angiocatheters should be utilized whenever flow rates exceed 3mL/sec.
Which of the following portions of the ECG corresponds to the period of atrial systole?
a. P wave
b. QRS complex
c. alpha wave
d. T wave -Correct Answer ✔P wave
Which of the following terms is used to describe the IV injection of medication or
contrast agent in one complete dose over a short time? -Correct Answer ✔bolus
Used in determining the biologic effect of iodinated CM, the term ___ refers to the
number of ions formed when a substance dissociates in a solution.
a. solubility
b. osmolality
c. concentration
d. iodination -Correct Answer ✔osmolality
also described as the number of particles in solution per kg of water.
The injection rate of an automatic injector is set at 1.5 mL/sec. What is the injection time
for a contrast agent vol of 150 mL?
a. 60 sec
b. 90 sec
c. 100 sec
d. 120 sec -Correct Answer ✔100 sec
Divide contrast age vol by the flow rate.
Mosby's CT Registry
