Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior exam , lung volumes have slightly decreased . Linear streaky bilateral lower lung opacities are most likely atelectasis , perhaps minimally increased from the prior exam . Elevation of right hemidiaphragm is unchanged and supports volume loss . Slight right shift of the mediastinum is also overall unchanged , further supporting volume loss . No pneumothorax or pleural effusion . No focal consolidation to suggest focal pneumonia . Heart size is difficult to assess given the projection provided .
    OUTPUT:
    
Interval increase in atelectasis with lower lung volumes likely . No definite focal pneumonia .