Question

Which of the following CT scanner designs does NOT use an x-ray tube?

1) first generation
2) PET/CT
3) electron beam CT
4) MDCT

Answer 1

The PET/CT scanner does not use an x-ray tube and instead uses radioactive isotopes to produce images.

Step-by-step explanation:

In the context of CT scanner designs, the CT scanner design that does NOT use an x-ray tube is the PET/CT scanner. The PET (Positron Emission Tomography) scanner utilizes radioactive substances administered to the patient before the scan to create images of active blood flow and physiological activity. Unlike other CT scanners that use x-ray tubes, the PET scanner uses radioactive isotopes to produce images.