CT REGISTRY EXAM 2026 QUESTIONS AND
CORRECT ANSWERS GRADED A+ MUST
STUDY!!
What radiation unit considers the biological effectiveness of radiation exposure?
mrem or mSv
"Fan" beam technology first historically came on the scene with which acquisition
geometries?
Second
"Rotate-rotate" applies to which of the following geometries?
Third
In CT what imaging plane is the pituitary best visualized?
coronal
The third ventricle of the brain communicates with the fourth ventricle through the
Cerebral aqueduct
,refers to an excessive Amount of nitrogenous materials in the blood and is a
symptom of renal failure.
Azotemia
Which paranasal sinus is usually the last to fully develop?
Frontal
What is the average annual radiation dose?
2 rem
10 rem converted to Sieverts is what?
0.1 Sv
convert 10 mSv to Sv
0.01 sV
annual limit for adult occupational effective dose?
0.05 Sv
,annual limit of occupational lens dose
0.15 Sv
annual limit of shallow dose equivalent to skin/extremities
0.5 Sv
occupational exposure to embryo/fetus during pregnancy
0.5 mSv
total effective dose equivalent to public
--also average background radiation
1 mSv
Mild reactions to iodinated intravenous contrast media include
nausea, vomiting, mild urticaria, and a warm flushed sensation
Moderate reactions?
Dyspnea, Hives (urticarial); wheezing (mild bronchospasm); change in pulse;
facial edema; vasovagal response; hypo- or hypertension
, Severe reactions?
Severe bronchospasm; anaphylaxis; Drowsiness; headache; fever/chills, Shock,
pulmonary edema
Osmolality
Concentration of a solution in terms of number of dissolved particles per unit of
water
Non-ionic intravenous contrast media such as Omnipaque should have an average
osmolality of
750 mOsm/kg water
What drugs are administered for moderate reaction to injection of iodinated
contrast medium
Antihistamines
Epinephrine
Prothrombin measures the amount of time necessary for a person's blood to
coagulate
normal limits: between 10 and 14 seconds
why use an autoclave?
CORRECT ANSWERS GRADED A+ MUST
STUDY!!
What radiation unit considers the biological effectiveness of radiation exposure?
mrem or mSv
"Fan" beam technology first historically came on the scene with which acquisition
geometries?
Second
"Rotate-rotate" applies to which of the following geometries?
Third
In CT what imaging plane is the pituitary best visualized?
coronal
The third ventricle of the brain communicates with the fourth ventricle through the
Cerebral aqueduct
,refers to an excessive Amount of nitrogenous materials in the blood and is a
symptom of renal failure.
Azotemia
Which paranasal sinus is usually the last to fully develop?
Frontal
What is the average annual radiation dose?
2 rem
10 rem converted to Sieverts is what?
0.1 Sv
convert 10 mSv to Sv
0.01 sV
annual limit for adult occupational effective dose?
0.05 Sv
,annual limit of occupational lens dose
0.15 Sv
annual limit of shallow dose equivalent to skin/extremities
0.5 Sv
occupational exposure to embryo/fetus during pregnancy
0.5 mSv
total effective dose equivalent to public
--also average background radiation
1 mSv
Mild reactions to iodinated intravenous contrast media include
nausea, vomiting, mild urticaria, and a warm flushed sensation
Moderate reactions?
Dyspnea, Hives (urticarial); wheezing (mild bronchospasm); change in pulse;
facial edema; vasovagal response; hypo- or hypertension
, Severe reactions?
Severe bronchospasm; anaphylaxis; Drowsiness; headache; fever/chills, Shock,
pulmonary edema
Osmolality
Concentration of a solution in terms of number of dissolved particles per unit of
water
Non-ionic intravenous contrast media such as Omnipaque should have an average
osmolality of
750 mOsm/kg water
What drugs are administered for moderate reaction to injection of iodinated
contrast medium
Antihistamines
Epinephrine
Prothrombin measures the amount of time necessary for a person's blood to
coagulate
normal limits: between 10 and 14 seconds
why use an autoclave?
