Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates ET tube with tip extending to 4 .2 cm above the carina . There is increased obscuration of the aortic contour and left cardiac border and more confluent left lower lobe opacity without airbronchograms , consistent with increased extent of atelectasis , now of the left middle and lower lobes . There may be a small left pleural effusion . Left upper lung and right lung appear well aerated . There is no pneumothorax or pleural effusion . There is no pulmonary edema .
    OUTPUT:
    
More confluent left middle and lower lobe atelectasis .