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img crit mid 1
image critique midterm - HD curve
Question | Answer |
---|---|
Does the H&D curve start at 0? Why? | no, because of base plus fog densities |
What is the diagnostic useful range of densities on the H&D curve? | .25-2.5 |
Radiographers working with any variables that interrelate can cause endless problems such as: | pyramid problem |
Who sets the imaging quality standards for the radiology department? | radiologist |
What would the H&D curve look like for a digital imaging system? | linear |
What portion of the H&D curve represents the contrast of the IR? | straight line portion |
What portion of the H&D curve represents the overexposed portion of the IR? | the shoulder |
What portion of the H&D curve represents the underexposed portion of the IR? | the toe |
Given specific base and fog densities for film, how would one determine what OD the film should be evaluated at? | OD1: base + fog + .25 OD2: base + fog + 2.0 |
Name the 5 steps of the imaging process | image acquisition, image processing, image archiving, image display, image analysis |