Which type of chest projection is NOT typically included in an abdominal series?

In an abdominal series, the purpose is primarily to examine the abdominal area to identify issues such as obstructions, free air, or organ positioning. While chest projections are included in certain imaging protocols, such as the PA (Posteroanterior) and lateral chest views, they are generally not the focus of an abdominal series.

The axial chest projection, although useful in specific settings, is not a standard part of the abdominal imaging routine. This is because axial views are typically used to capture detailed images of the thoracic structures rather than to address abdominal concerns. Additionally, the axial position often emphasizes certain anatomical relationships that are not the primary interest when assessing the abdomen.

When performing an abdominal series, the chest projections that are usually included, namely PA and lateral views, aim to rule out any problems that may extend from the abdominal cavity to the thoracic cavity, such as fluid levels or air in the diaphragm, which could indicate pathological conditions involving both areas. Thus, the axial chest projection is the least relevant to the goals of an abdominal series, making it the correct choice for this question.