What is the collimation requirement for an AP Thoracic X-ray?

The collimation requirement for an AP Thoracic X-ray is crucial for ensuring that the pertinent anatomy is captured while minimizing radiation exposure to surrounding tissues. The correct choice specifies collimating horizontally at the mid clavicle line and vertically 1 inch from the film margins.

This approach is effective because collimating at the mid clavicle line allows the radiologist to include vital structures in the thoracic region, such as the heart and lungs, which are necessary for a comprehensive evaluation. The vertical collimation that is set at 1 inch from the film margins optimally captures the thoracic vertebral column while avoiding excess exposure to areas that are not of primary interest. This specific collimation technique helps improve the quality of the image while providing a clear view of the anatomy needed for diagnosis.

By adhering to this collimation standard, radiologic technologists ensure that the resulting X-ray is of high diagnostic quality and that patient safety is prioritized through minimized radiation exposure.