Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate left pleural effusion is unchanged , and left lower lobe collabse obscuring the left hemidiaphragm , and limiting assessment of the cardiac size . The right lung is well expanded and grossly clear , with no focal consolidation , pleural effusion , or pulmonary edema . There is no pneumothorax . Dense atherosclerotic calcifications in the aortic arch are again seen .
    OUTPUT:
    
Moderate left pleural effusion is unchanged . Right lung is grossly clear .