CT apparatus has its own dedicated subheading (902212), separate from other medical, surgical, and veterinary X-ray apparatus (902214). The distinction matters because duty rates and any applicable trade-remedy exposure can differ by subheading. Classification follows the apparatus's principal operating method: computed tomography systems go under 902212 regardless of the clinical specialty they serve.

Medical X-ray apparatus must comply with FDA's radiation-safety performance standards for electronic products and, if it qualifies as a medical device, must also meet applicable premarket requirements. Importers should confirm FDA registration of the foreign manufacturer and verify that the equipment meets the applicable performance standard before shipment. Non-compliant equipment can be refused entry or detained.

X-ray tubes have their own subheading (902230), while generators, control panels, examination tables, and other parts and accessories fall under 902290. A component that is itself a complete X-ray tube is classified under 902230 regardless of the system it is destined for; other parts are classified under 902290 unless a more specific subheading applies.