Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable semi-erect chest radiograph is provided . Patient is rotated to her left . Lung volumes are low . The heart is upper limits of normal in size , exaggerated by the low lung volumes . Opacification projecting over the right middle lung zone may reflect sequela of atelectasis or aspiration though infectious etiology is difficult to exclude . Obscuration of the left costophrenic angle may reflect a small pleural effusion . Biapical pleural thickening may reflect layering pleural effusion . There is no large pneumothorax . No overt pulmonary edema . Prominence of the vascular pedicle is likely secondary to patient positioning and low lung volumes . No acute osseous abnormality is identified . Imaged upper abdomen is unremarkable .
    OUTPUT:
    
Overall appearance of the chest relative to prior radiograph performed ___ is not significantly changed allowing for patient positioning and low lung volumes . Opacification in the right midlung zone medially may be sequela of atelectasis or aspiration . Infectious process can not be excluded . Thickening of bilateral apical pleura may reflect layering pleural effusion .