Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-erect AP and lateral images of the chest were obtained . There are low lung volumes and resultant bibasilar atelectasis ; otherwise the lungs are clear without consolidation or pulmonary edema . Allowing for the technique , the cardiomediastinal silhouette is within normal limits and unchanged . There is no pneumothorax . Blunting of the bilateral costophrenic angles greater on the left than on the right which is due to a small pleural effusions . Mild multilevel thoracolumbar spondylosis is unchanged . There is no free air beneath the right hemi-diaphragm .
    OUTPUT:
    
Bilateral small pleural effusions , greater on the left than right . No other acute intrathoracic process .