Final answer:
CT scanners use computed axial tomography (CAT) to produce highly detailed three-dimensional images of small parts using X-rays and computer processing.
Step-by-step explanation:
CT scanners are able to produce detailed images of small parts by using a technique called computed axial tomography (CAT).
This technique involves passing X-rays through a narrow section of the patient's body and collecting multiple images from different angles.
These images are then processed by a computer to create a highly detailed three-dimensional image.
This allows physicians to visualize and measure small parts with precision, down to a millimeter.