Computed Tomography Test Computed Tomography Ultimate 5

Question 1

What is the typical radiation dose range for a standard adult abdomen-pelvis CT examination?

Accepted Answer

8-15 mSv

Answer

A standard adult abdomen-pelvis CT delivers approximately 8-15 mSv effective dose, significantly higher than chest X-ray but providing much greater diagnostic information.

Question 2

Which reconstruction filter (kernel) would be most appropriate for evaluating fine bony detail in CT?

Accepted Answer

Sharp/bone kernel

Answer

Sharp or bone kernels enhance high-frequency information (edges) at the cost of increased noise, making fine bony trabecular and cortical detail more visible.

Question 3

What is the significance of the 'z-flying focal spot' technology in multidetector CT?

Accepted Answer

It doubles the number of effective slices by alternating focal spot positions along the z-axis

Answer

Z-flying focal spot alternates the focal spot between two positions along the z-axis within each rotation, doubling the number of independently acquired slices and improving z-axis resolution.

Question 4

A patient presents with an allergy to shellfish. What is the appropriate clinical management before administering iodinated contrast?

Accepted Answer

Shellfish allergy alone is not a reliable predictor; assess for prior contrast reactions specifically

Answer

Shellfish allergy is a common misconception as a predictor of contrast allergy; the true risk factor is a prior reaction to iodinated contrast media specifically.

Question 5

In CT perfusion imaging of the brain, which parameter best reflects the integrity of cerebral autoregulation?

Accepted Answer

Cerebral blood volume (CBV)

Answer

Cerebral blood volume (CBV) reflects the total volume of blood in a given brain region and is maintained by autoregulation; preserved CBV with reduced CBF indicates penumbral tissue.

Computed Tomography Test Practice Test

Computed Tomography Test Practice Test

Computed Tomography Test Computed Tomography Ultimate 5