Which imaging technique uses a thin fan-shaped x-ray beam that rotates around the patient to produce cross-sectional views of body?

The correct answer is cone beam CT (CBCT)

Cone beam CT is an imaging technique that uses a thin fan-shaped x-ray beam that rotates around the patient to produce cross-sectional views of the body. It is similar to traditional CT, but uses a much smaller x-ray source and detector, which makes it more compact and portable. CBCT is often used for dental imaging, as well as for imaging the sinuses, nasal passages, and temporal bones.