In lateral thoracic positioning, what should be included in the collimation?

In lateral thoracic positioning, the correct approach for collimation is to include all vertebral segments and the posterior soft tissues. This comprehensive collimation ensures that the entire area of interest is captured for diagnostic purposes. By including all vertebral segments, you ensure that any potential pathology in the thoracic spine is visualized.

Involving the posterior soft tissues is also critical, as they can provide important contextual information related to the thoracic spine, such as potential tumors, infections, or other abnormalities. This practice aids in achieving a complete and diagnostic radiograph, ensuring that the radiologist has the necessary information to interpret the image effectively.

Focusing only on specific parts, such as just the vertebral segments or only anterior or upper body structures, would likely result in missing important diagnostic information that could come from the surrounding soft tissues or other vertebrae not included in the limited view. Therefore, the inclusion of both the vertebral segments and the posterior soft tissues ensures thoroughness and accuracy in imaging the thoracic region.