Principles Of Radiographic Imaging Final Review

What is the relationship between OID and Magnification? {Ans: OID and Magnification have a direct relationship.}As scatter and secondary radiation increase, receptor exposure _______ and contrast _______. {Ans: Increase;Decrease}Which x-ray photon to tissue interaction results in an ejected electron and a change in direction of photon with lower energy? A) photoelectric effect B) characteristic effect C) compton effect D) coherent effect {Ans: Compton Effect}Which of the following grid ratio(s) are common in fixed x-ray systems? 1. 10:1 2. 6:1 3. 12:1 4. 16:1 A) 2 only B) 3 & 4 C) 1 & 3 D) 1 only {Ans: 1 & 3}What does the convergent point and line help determine in a focus grid? 1. grid radius 2. focal range 3. focal distance A) 1 only B) 3 only C) 1 & 3 D) 1, 2, & 3 {Ans: 3 Only}The amount of unsharpness in an image is termed: A) penumbra B) spatial resolution C) focal spot D) umbra {Ans: Penumbra}Why would you purposefully induce Shape Distortion? {Ans: To examine other parts of the anatomy that might otherwise be difficult to see.}What should be placed directly over the AECs in order to get the