Final answer:
Using shielding, increasing distance from the source, and limiting exposure time can reduce patient dose during a CT without changing the technical factors.
Step-by-step explanation:
One way to reduce patient dose during a CT without changing the technical factors is to use shielding. Shielding absorbs radiation and can be provided by any material, including air. Another way is to increase the distance from the source, as the further away the source is, the more the radiation spreads out. Additionally, limiting the time of exposure can also reduce the dose received by the patient. Faster films that require less exposure time have been developed, resulting in decreased doses from most medical diagnostics.