Question

For an AP chest projection obtained with a mobile x-ray unit, which of the following statements is true?

1) The IR is positioned parallel with the midcoronal plane.
2) The image is obtained without the use of a grid.
3) The manubrium is superimposed over the fourth thoracic vertebra.
4) 10 or 11 posterior ribs are demonstrated above the diaphragm.

Answer 1

The IR must be positioned parallel with the midcoronal plane in an AP chest projection. The manubrium aligns with the third and fourth thoracic vertebrae, and 10 or 11 posterior ribs are usually visible above the diaphragm in a proper AP projection.

Step-by-step explanation:

For an AP chest projection obtained with a mobile x-ray unit, the following statement is true: The IR is positioned parallel with the midcoronal plane. This alignment ensures that the x-ray beams penetrate the body in a manner that provides a clear image of the thoracic structures. The manubrium is located at the superior part of the sternum, and it normally aligns with the third and fourth thoracic vertebrae on an AP projection. Lastly, typically 10 or 11 posterior ribs are demonstrated above the diaphragm in a well-positioned AP chest projection, indicating full inspiration by the patient during the x-ray.