What term is used to describe the path of the CR from the radiographic tube, through the patient and to the IR?

The term used to describe the path of the central ray (CR) from the radiographic tube, through the patient, and to the image receptor (IR) is "projection." In radiography, projection specifically refers to the geometric representation of the CR's path as it moves from the source (the x-ray tube) through the tissue of the patient and ultimately to the IR, where the image is recorded.

Understanding the concept of projection is crucial in providing clear and accurate images, as different angles of projection can result in varying anatomical representations. This technique is essential for ensuring that the desired anatomical area is properly visualized and that the final image has the necessary diagnostic quality.