Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lateral view is suboptimal due to the patient 's overlying arm . Given this , there are slight low lung volumes . Left base opacity on the frontal view , not substantiated on the lateral view , most likely represents atelectasis or scarring . No definite focal consolidation is seen . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal to mildly enlarged . The aorta is unfolded . No displaced fracture identified . Degenerative changes are seen along the spine and at the glenohumeral and acromioclavicular joints .
    OUTPUT:
    
Low lung volumes and suboptimal lateral view due to patient 's overlying arm . Left base opacity seen on the frontal view , not substantiated on the lateral view may be due to atelectasis / scarring . No displaced fracture seen .