Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . No focal consolidation convincing for pneumonia is present . Heart size is normal . Best appreciated on the lateral image , there is equivocal soft tissue density in the retrosternal region which may reflect prominent outflow tract or soft tissue in the prevascular space . There is no pleural effusion , pneumothorax , or evidence of pulmonary edema . Imaged osseous structures and upper abdomen are without an acute abnormality .
    OUTPUT:
    
Equivocal soft tissue density in the retrosternal region which may reflect prominent outflow tract or alternatively soft tissue in the prevascular space . Chest CT could further assess .