Which of the following does not demonstrate the use of a "blanket rule" for positioning and centering?
A. Applying a 5°-7° caudal angle for the lateral L5-S1 spot on all female patients
B. Applying a 3°-5° cephalad angle on a patient with thick thighs and buttocks instead of keeping the CR perpendicular to the IR for an AP knee projection
C. For a PA chest projection, placing the IR crosswise for all male patients and lengthwise for all female patients
D. Applying a 10° posterior angle for all AP foot projections to open the MTP joints
Answer: B
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