Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph was provided . The study is slightly limited due to patient 's body habitus . Opacity at the left base may be due to overlying soft tissue or atelectasis . There is no focal consolidation , pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . Left shoulder arthroplasty is noted . There are no displaced fractures .
    OUTPUT:
    
Limited due to patient body habitus . No acute cardiopulmonary process .