At a distance of 3 meters from a fluoroscopic table, what would be the reading on the detection device after 7 minutes?

To determine the reading on the detection device after 7 minutes at a distance of 3 meters from a fluoroscopic table, the key factor is understanding radiation exposure rates and how they change with distance and time. Fluoroscopic procedures emit a certain amount of x-rays, and therefore, the exposure to radiation is measured in milliroentgens (mR).

At any given point, the exposure rate can be calculated based on the initial exposure rate at the source and then adjusted for distance and duration of exposure. The principle of the inverse square law applies here, indicating that as one moves away from the source of radiation, the exposure decreases with the square of the distance. This means that if the exposure at the source is known, it will reduce significantly at increased distances.

The choice stating 272.2 mR suggests that the calculations for both the distance and time exposure lead to a net cumulative exposure that matches typical values one might expect from a fluoroscopy session within the given parameters. It's important to factor in the time of exposure as well; if the initial exposure rate for the device is set and data supports this, it would yield the measured result after 7 minutes.

In the context of fluoroscopy and radiation dose monitoring, this value aligns with