Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation of this radiograph is somewhat limited due to overlying soft tissues . Lung volumes are low , with unchanged moderate right hemidiaphragm elevation . There is possible mild cardiomegaly , unchanged . There are no definite pleural effusions . No pneumothorax . There have been bilateral shoulder hemiarthroplasties .
    OUTPUT:
    
1 . Essentially clear lungs . Low lung volumes and overlying soft tissue make it difficult to evaluate for mild pulmonary edema . 2 . Unchanged extent of possible mild cardiomegaly .