e. Oblique Trunk and Skull Positions. When labeling film for an oblique trunk
or skull projection (figures 4-33 through 4-36), make sure that you label the side of the
body or the part that is of clinical interest. As stated earlier, for an FFC oblique, the
letter mark should correspond to the side of the body being demonstrated. For a
restricted CF oblique, the letter marker should correspond to the part being
Figure 4-33. Both letter markers (LMs) have been used in these two different views,
demonstrating appropriate placem ent of the LM.
Figure 4-34. A lateral (lat.) skull projection with a restricted CF the letter marker
corresponds to the part being demonstrated (side down).