Radiographic Image Formation, Image Detail And Quality Control Flashcards
Magnification =
focal object distance (FOD)/ focal film distance (FFD)
Image detail depends on
Geometric unsharpness
Motion unsharpness
Inherent unsharpness
Quantum mottle
Geometric unsharpness
Focal spot size
Focal spot film distance
Object film distance
Film screen contact
Focal spot size
Increase object to film distance =
Increase magnification
Inherent unsharpness is I nherent to
Film-screen combination
Quantum mottle
The effect of a limited number of X-Ray photons on the appearance of the radiograph
Distortion results from
Unequal magnification of different parts of same object
Increase mA=
Increase film blackness
Increase exposure time =
Increase film blackness
Increase focal film distance =
Decrease film blackness
Low KVp will produce films with
High contrast
High KVp will produce films with
Low contrasts
