CAMRT COMPREHENSIVE EXAM CT PART
2026-2027 QUESTIONS AND ANSWERS GRADED
A+
The focus-to-detector distance describes
_____________________________________If this distance is increased, the
patient dose will __________
the distance between the x-ray source (CT tube) and the detector
array, decrease
the MDCT has a higher dose for the patient because of:
-Decrease in the focus-to-detector distance.
-Use of a cone beam
-Increases in the number of phases of acquisition
-Thinner section widths
The CT dose index (CTDI)
approximate measure of the dose received in a single CT section or slice
CTDIw is
,a weighted index that Approximate's radiation dose on the basis of variations that
occur across the field of view
CTDIw does not account for the
effects of helical scanning on patient radiation dose
CTDIvol is
used to approximate the radiation dose for each
section obtained during a helical scan
MSAD _______________ when slice thickness is greater than image
spacing—overlapping scans
increases
dose length product (DLP)
the measurement of dose for the entire series of CT images. equal to the calculated
dose per section mulitplied by the length of a CT acquisition along the z-axis.
,Dose notification describes
an automated software feature
that informs the technologist when the prescribed technical
settings for an individual CT acquisition may result in a
CTDIvol or DLP that is higher than a preset recommended
value.
Recommendations for the reduction of pediatric dose include
-Eliminate CT scans for inappropriate indication.
-Reduce multiphase scanning (precontrast, delays, and so on).
-Reduce mA. and Reduce kVp
-Increase pitch.
-One single-acquisition phase is often enough
Physiologic and pathologic processes that may increase the
risk of adverse reaction or other untoward outcome from
iodinated contrast include:
Asthma.
Environmental and/or food allergies.
Renal disease.
Multiple myeloma.
Diabetes mellitus.
Pheochromocytoma.
, Sickle cell disease.
Hyperthyroidism.
Significant cardiac disease.
Anxiety
Contraindications to IV iodinated contrast agents include:
a. Allergy to iodine.
b. Prior severe allergic reaction to an iodinated contrast agent.
c. Renal insufficiency/failure.
Prospective ECG Triggering (Also known as sequential or cine-mode scanning):
Acquires images only in those portions of the cardiac cycle expected to have the
lowest cardiac motion
CT Coronary Calcium Screening uses a ______ detector-row CT scanner with a
_____second gantry rotation time is the minimal requirement for a coronary
calcium measurement
four, 0.5
In CT abdomen imaging The DFOV should be
just large enough to include the skin surface over the key areas being imaged
2026-2027 QUESTIONS AND ANSWERS GRADED
A+
The focus-to-detector distance describes
_____________________________________If this distance is increased, the
patient dose will __________
the distance between the x-ray source (CT tube) and the detector
array, decrease
the MDCT has a higher dose for the patient because of:
-Decrease in the focus-to-detector distance.
-Use of a cone beam
-Increases in the number of phases of acquisition
-Thinner section widths
The CT dose index (CTDI)
approximate measure of the dose received in a single CT section or slice
CTDIw is
,a weighted index that Approximate's radiation dose on the basis of variations that
occur across the field of view
CTDIw does not account for the
effects of helical scanning on patient radiation dose
CTDIvol is
used to approximate the radiation dose for each
section obtained during a helical scan
MSAD _______________ when slice thickness is greater than image
spacing—overlapping scans
increases
dose length product (DLP)
the measurement of dose for the entire series of CT images. equal to the calculated
dose per section mulitplied by the length of a CT acquisition along the z-axis.
,Dose notification describes
an automated software feature
that informs the technologist when the prescribed technical
settings for an individual CT acquisition may result in a
CTDIvol or DLP that is higher than a preset recommended
value.
Recommendations for the reduction of pediatric dose include
-Eliminate CT scans for inappropriate indication.
-Reduce multiphase scanning (precontrast, delays, and so on).
-Reduce mA. and Reduce kVp
-Increase pitch.
-One single-acquisition phase is often enough
Physiologic and pathologic processes that may increase the
risk of adverse reaction or other untoward outcome from
iodinated contrast include:
Asthma.
Environmental and/or food allergies.
Renal disease.
Multiple myeloma.
Diabetes mellitus.
Pheochromocytoma.
, Sickle cell disease.
Hyperthyroidism.
Significant cardiac disease.
Anxiety
Contraindications to IV iodinated contrast agents include:
a. Allergy to iodine.
b. Prior severe allergic reaction to an iodinated contrast agent.
c. Renal insufficiency/failure.
Prospective ECG Triggering (Also known as sequential or cine-mode scanning):
Acquires images only in those portions of the cardiac cycle expected to have the
lowest cardiac motion
CT Coronary Calcium Screening uses a ______ detector-row CT scanner with a
_____second gantry rotation time is the minimal requirement for a coronary
calcium measurement
four, 0.5
In CT abdomen imaging The DFOV should be
just large enough to include the skin surface over the key areas being imaged
