What type of collimation reduces patient radiation exposure by 70%?

The use of rectangular collimation is highly effective in reducing patient radiation exposure, achieving a significant decrease, often cited as up to 70%. This is primarily due to its design, which closely conforms to the size and shape of the radiographic receptor, meaning that less of the patient’s tissue is exposed to unnecessary radiation.

By limiting the beam to the area of interest, rectangular collimation minimizes scatter radiation and enhances image quality, allowing for a clearer diagnostic outcome while simultaneously protecting the patient from excess radiation exposure. This is particularly important in dental radiography, where precise targeting is essential, and the risk of radiation exposure should be minimized. This contrasts with other collimation types that may not as effectively restrict the beam and thus allow for more excessive radiation exposure to surrounding tissues.