What is central ray entry? Central ray entry is where the PID/cone is centered on the patient. While this may seem to be the easiest thing to do, central ray entry errors are very common. There really is only one central ray entry error and that is when the PID […]
What is vertical angle? Vertical angle refers to the position the Position Indicating Device (PID or cone) is along the coronal and/or sagittal planes. A zero degree vertical angle is when the PID is positioned parallel with the axial plane. A positive vertical angle is when the source of radiation […]
What is horizontal angle? Horizontal angle refers to the position the Position Indicating Device (PID or cone) is along the axial plane. Horizontal angle can be increased or decreased. A zero degree horizontal angle is when the PID is positioned parallel with the sagittal plane. Increasing horizontal angle moves it towards […]
