Final answer:
The radiologic finding of a radiolucent band adjacent to the cardiac border is typical of the moderator band in the heart.
Step-by-step explanation:
The radiologic finding of a radiolucent band adjacent to the cardiac border is typical of the moderator band in the heart. The moderator band is a band of myocardium covered by endocardium that crosses the right ventricle and links the inferior portion of the interventricular septum to the anterior papillary muscle.