Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lordotic positioning . Heart size is at the upper limits of normal or slightly enlarged . Nonvisualization of the cardiac apex most likely reflects the presence of a cardiac fat pad . Aorta is minimally unfolded . Right paratracheal soft tissue density is noted , but likely reflects vascular structures . There is equivocal minimal upper zone redistribution , without other evidence of CHF . There mild retrocardiac atelectasis . No focal consolidation or effusion is identified . No pneumothorax detected . Small focus of hydroxyapatite it is seen adjacent to the left shoulder , consistent with calcific tendinitis , of indeterminate acuity .
    OUTPUT:
    
1 . Heart size at upper limits of normal or slightly enlarged . 2 . Minimal basilar atelectasis . 3 . Possible minimal upper zone redistribution , but no overt CHF , frank consolidation , or effusion detected . 4 . If clinically indicated , PA and lateral radiographs could help to further assess the left base atelectasis and mediastinal contours .