With film-screen imaging using AEC,if an AP thoracic spine is imaged with the central ray passing 3 inches to the right of the spine,the density in the area of interest will be __________________ and the exposure time will be ________________________.(Assume all other factors are appropriate. )

Question

Quizplus · Accepted Answer

If the centering is 3 inches to the right of the spine,the lungs are superimposing the detector.Because the detector is terminating the exposure when enough radiation exits the lungs,the exposure is too short and the spine is light.

With Film-Screen Imaging Using AEC,if an AP Thoracic Spine Is