Figure 2-8. Multiple exposures may be obtained on the same film: with 2 (as in A), 4
(as in B), a nd 6 views per film (as in C).
(3) Direction of film. Does the film have to be placed lengthwise (LW) or
crosswise (CW) to the part being radiographed? Correct film placement is crucial to
ensuring that the structure of anatomical interest is adequately demonstrated.
(4) Manner of use. Will the X-ray be taken with a Bucky (B) or non-Bucky
(NB)? As stated earlier, denser anatomical structures may require the use of the Bucky
(5) Letter marker (LM). It is important to affix the correct letter markers to
the film before taking the exposure. Be sure to place the correct letter marker on the
side of the film corresponding to the side of the body of anatomical interest. For
example, place a left marker on the left side of the film. For a patient facing the film in a
PA position, a left marker would be appropriately placed on the left side of the film, the
part of the film corresponding to the left shoulder. If an AP view of the right arm, leg, or
hand were needed, a right marker would be placed on the film. The film blacker should
be placed so that it is out of the area of interest to be visualized (demonstrated).
visualize (demonstrate): to obtain a clear radiographic image of the primary and
surrounding anatomical structures that are of clinical interest.
(6) Film identification. Proper identification includes the patient's name or
code, the date the films are being taken, and the facility where taken. The age of the
patient or date of birth is also recommended. The marker is usually placed on the outer
margin of the cassette as there is not a lot of clearance between the top of the cassette
and the grid. By placing the marker on the outer margin, there is less chance of it being
misplaced or overlying and, thus, obscuring structures you are trying to visualize. See
figures 2-9 and 2-10.
mislabeling the film: for example, confusing the right with the left side of the chest;
can lead to misdiagnosis and a failure to treat the condition.