Which of the following is true about the relationship of SID and radiation dose?

The relationship between Source-to-Image Distance (SID) and radiation dose is well established in radiographic principles. Increasing the SID leads to a decrease in patient dose due to the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source. As the distance increases, the amount of radiation that reaches the patient decreases significantly. This decrease is beneficial as it helps minimize the exposure and potential risk to the patient while still achieving necessary imaging quality.

In addition, increasing the SID typically necessitates adjustments in technical factors to maintain image quality, such as increasing the exposure time or the amount of radiation generated. However, these adjustments do not compensate for the significant decrease in dose that occurs with increased SID.

Understanding this principle is essential for radiographers to optimize imaging techniques while ensuring patient safety through reduced radiation exposure.