RADIOGRAPHIC TECHNIQUE HIGH YIELD Flashcards
factors that influence technique?
patient factors
image-quality factors
subject contrast used in what body parts?
chest
abdomen
extremities
what are the patient factors?
thickness of part
body composition
pathology
what are the image quality factors?
optical density
contrast
image detail
image distortion
how is optical density controlled?
changing mAs
what controls the contrast?
kVp
what controls the image detail?
focal spot size
what controls image distortion?
patient position
for subject contrast, what are the densities for the organs in the chest, like lung, bone, mediastinum?
how is contrast in the chest manipulated?
low mass density
high mass density
intermediate mass density
high kVp and low mAs
how is contrast in the abdomen manipulated?
low kVp and high mAs
how is contrast in the extremities manipulated?
low kVps due to part thickness
MAs must be change how many percent to produce a visible change in OD?
30%
kVp setting must be change by how much to produce a visible change in OD?
4%
what is the major factor for controlling radiographic contrast?
kVp
simplest method to increase or decrease OD is via?
mAs
