Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was obtained . The lungs are reasonably well expanded with elevation left hemidiaphragm resulting in left basilar atelectasis . There is no pulmonary edema . No pneumothorax or pleural effusion seen . The heart is moderately enlarged with prominent ascending aortic contour .
    OUTPUT:
    
Left basilar atelectasis likely relating to elevated left hemidiaphragm without acute intrathoracic process . If patient is able , a conventional 2 view radiograph including a lateral view would be useful to assess for left pleural effusion accounting for the basal opacity .