Question

why does a patient receive more radiation from a ct scan than from having an x - ray image made?
a. higher - frequency rays are used in a ct scan.
b. the x - rays are more powerful in a ct scan.
c. fewer x - rays are reflected in a ct scan.
d. a ct scan involves multiple x - ray images.

Explanation:

A CT - scan creates cross - sectional images of the body by taking multiple X - ray images from different angles. Each X - ray image exposes the patient to some radiation, and since there are multiple images, the cumulative radiation dose is higher compared to a single X - ray image. The rays used in both are X - rays (same frequency range), and it's not about the power of individual X - rays or reflection of X - rays being the main factor for the higher dose in CT scans.

Answer:

D. A CT scan involves multiple X - ray images.