Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Exam is limited secondary to portable technique and patient 's body positioning . The increased retrocardiac opacity suggestive of hiatal hernia . Left base opacity is also seen with obscuration of the left hemidiaphragm . Cardiomediastinal silhouette is otherwise within normal limits given severely limited exam . Bones are diffusely osteopenic . There is coarsened trabecular pattern of the proximal left humerus suggestive of pagetoid changes .
    OUTPUT:
    
Left basilar opacity potentially due to atelectasis infection or aspiration , not well visualized . PA and lateral may offer additional detail if patient is amenable