Spatial Resolution (Beam Geometry) - Video Lesson

Hey, everybody. Welcome back. This lesson is about the geometric factors that influence spatial resolution in radiography. Remember spatial resolution is the structural sharpness recorded in the radiographic image. And it is an important image quality factor. The term beam geometry simply refers to all of the angles and used during the radiographic procedure. This includes the source to image distance, the object to image distance, the effective focal spot size and related variables, the X-ray tube angle, object angle, and receptor angle. These geometric variables affect spatial resolution for the same reason. Changes to these variables influence the amount of blur called penumbra recorded in the radiographic image. It's important to understand these principles because X-ray operators can directly control