Rectangular Collimation Reduces Radiation Exposure in Dentistry
By: Justin Steinberg, D.D.S., Director of Oral and Maxillofacial Radiology
Many clinicians might not realize how changing the shape from a circle to a rectangle “magically” decreases the dose to the patient. There is nothing magical about the shape of a rectangle. The reason why the dose to the patient decreases is because the cross-sectional area of a rectangular collimator is substantially less than the cross-sectional area of a circular collimator. Therefore, a smaller area of the patient’s tissues ends up being irradiated.