Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lungs appear somewhat lucent and hyperinflated which is likely due to underlying emphysema . Subtle opacity at the left lung apex is noted which is indeterminate . There is also apparent shift of the trachea to the right which could in part reflect mild rotation . Given presence of emphysema , a nonemergent CT is recommended to further assess for underlying lesion . No convincing evidence for pneumonia is seen . No large effusion or pneumothorax . Cardiomediastinal silhouette appears normal . Bony structures are intact .
    OUTPUT:
    
Emphysema with subtle left apical opacity with mild rightward shift of the trachea . Recommend nonemergent chest CT to further assess for possible underlying lesion .