How do operator exposures from CT examinations compare to those from planar radiography?

Operator exposures from CT examinations are generally lower than those from planar radiography. This is primarily due to the design of CT machines, which allows for better shielding and more precise targeting of the radiation. In CT scans, the radiation is delivered in a controlled manner during a short period of time while rotating around the patient, thereby reducing the exposure to operators and personnel outside the scan area. The technology also often includes features that minimize extraneous exposure, such as automatic exposure control and improved collimation.

In contrast, planar radiography typically involves more scatter radiation and may expose operators to higher levels of ionizing radiation since the x-ray beam is broader and encompasses a larger area. Additionally, the positioning required for manual imaging procedures may place operators closer to the radiation source without the protective features that modern CT technology incorporates. Thus, overall, the operator exposures associated with CT examinations are indeed lower than those from conventional planar radiography.