For accurate positioning, each of the following is essential except:
A. Two points must always be used to define a positioning line
B. Positioning lines and planes must be viewed by the radiographer from the same horizontal level that the patient or the anatomy is on
C. Positioning planes must be evaluated from a true end-on viewpoint
D. At least two different viewpoints, perpendicular to each other, are required for the radiographer to assess all positioning planes
Answer: B
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