A Rotating Collimator Head

Multiple Choice

A rotating collimator head
1) can be rotated without rotating the entire tube column on DR systems.
2) does not affect the alignment of the beam with the grid.
3) allows the technologist to increase collimation on projections when the longitudinal axis of the anatomical structure is not aligned with the longitudinal or transverse axis of the IR.
4) should be avoided when using computed radiography because it may affect the exposure field recognition process.

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