The Off-Centered Diverged Beams of a Perpendicular CR Will Affect

question 36

Multiple Choice

The off-centered diverged beams of a perpendicular CR will affect structures in the same manner as an angled CR. Which of the following statements best describes this relationship?
1) At a 40-inch SID, the divergence of x-rays is 1 degree for every inch off-centered in any direction from the CR.
2) At a 48-inch SID, beam divergence is off-centered about 2 degrees for every inch in any direction from the CR.
3) At a 40-inch SID, the divergence of x-rays is 2 degrees for every inch off-centered in any direction from the CR.
4) At a 72-inch SID, beam divergence is off-centered about 1 degree for every inch.

• A) 1 and 2 only
• B) 3 and 4 only
• C) 1 and 4 only
• D) 2 and 4 only

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