Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph is obtained with the patient in the semi-erect position . Tracheostomy noted . Cardiomediastinal silhouette is unchanged ; bulging of the pulmonary outflow tract reflects enlargement of pulmonary arteries and suggests underlying pulmonary arterial hypertension . Pulmonary edema has slightly improved compared to the prior study . Small right pleural effusion is unchanged . Again bibasilar opacifications are noted and are suggestive of atelectasis or consolidation .
    OUTPUT:
    
1 . Unchanged bibasilar opacities are consistent with atelectasis or consolidation and pneumonia should be considered in the appropriate clinical context . 2 . Improved pulmonary edema .