Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased retrocardiac density and obscuration of the left hemidiaphragm , consistent with left lower lobe collapse and / or consolidation . A small amount of left pleural fluid can not be excluded . The cardiomediastinal silhouette is partially obscured , but the heart does not appear frankly enlarged . The mediastinum remains midline . There is platelike atelectasis in the right mid zone . A small ( 4 .3 mm ) rounded density in the right upper zone laterally overlying the right third anterior most likely represents a calcified granuloma . The lungs are otherwise clear , without focal infiltrate , CHF , or right pleural effusion . No pneumothorax detected .
    OUTPUT:
    
1 . Left lower lobe collapse and / or consolidation , with possible small left effusion . Minimal atelectasis right base . 2 . No CHF . 3 . Probable small granuloma right upper zone laterally .