Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright and lateral views of the chest were provided . The lungs are essentially clear , though lung volumes are low . The heart is mildly enlarged . No pneumothorax or effusion is seen . No definite bony abnormality is seen , though upon second review of prior CT chest from two days ago , there is a minimally displaced anterior rib fracture , involving the right fifth rib .
    OUTPUT:
    
Right fifth rib fracture better seen on the prior CT . No pneumothorax . Cardiomegaly redemonstrated . Findings were flagged and posted to the ED dashboard at the time of this dictation .