What is the effect of using a higher exposure time in fluoroscopy?

Using a higher exposure time in fluoroscopy increases the amount of radiation that the patient receives, leading to a higher patient dose. Fluoroscopy involves continuous exposure to X-rays to create moving images of internal structures, and if the exposure time is prolonged, the cumulative dose of radiation that the patient experiences also increases.

While the other choices might seem relevant in certain contexts, they do not accurately convey the essential relationship between exposure time and patient dose. For instance, longer exposure times can potentially lead to a decrease in image quality due to motion artifacts, but this is not a direct effect on patient dose. Similarly, while image resolution can improve with increased exposure, the primary concern in terms of radiation protection is the patient dose. Thus, the correct choice reflects the fundamental principle that longer exposure directly correlates to a higher level of radiation received by the patient.