Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are again noted to be mildly hyperexpanded with mild vascular congestion . Streaky opacities within the right lower lobe are most consistent with atelectasis . Heterogeneous peripheral opacity within the right mid hemi thorax is new since prior examination and better assessed on dedicated CT performed the same day . No pleural effusion or pneumothorax . Aortic knob calcifications are present . The heart is moderately enlarged , unchanged since ___ . Mediastinal contour and hila are unremarkable .
    OUTPUT:
    
1 . Mild vascular congestion . 2 . Hyperexpanded lungs can be seen in setting of small airways disease and chronic obstructive pulmonary disease . 3 . Right mid hemi thorax heterogeneous peripheral opacity is better characterized on CT chest performed on same day . Differential includes atelectasis and pulmonary infarct given history of pulmonary embolism . 4 . Right lower lobe atelectasis .