Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower compared to the prior exam , which may in part be related to respiratory effort or phase of respiration . Left lower lobe , ill - defined opacity with slight indistinctness of the left hemidiaphragm on only the frontal view and ill - defined corresponding hypodensities in the posterior inferior long on the lateral view could represent atelectasis and / or pneumonia in the appropriate clinical situation , more pronounced from the prior exam , albeit on the opposite side of the patient 's current symptoms . No focal consolidation is identified in the right lung . No pleural effusions , pneumothorax , or edema . The heart is probably normal in size given the lower lung volumes . The mediastinum is unremarkable . No acute osseous abnormality . Bilateral moderate degenerative changes in the acromioclavicular joints are again seen . No subdiaphragmatic free air is identified .
    OUTPUT:
    
1 . Lower lung volumes . 2 . Probable left lower lobe atelectasis , although pneumonia in the appropriate clinical situation can not be excluded . However , of note , these radiographic findings are on the side opposite at the patient 's symptoms . No definite right lung consolidation . 3 . No specific finding to explain the patient 's right - sided symptoms .