Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Evaluation limited due to low lung volumes and patients rightward rotation . Cardiomegaly is partially noted . There is no convincing evidence for pneumonia or CHF . No large effusion or pneumothorax . The thoracic aorta is unfolded though mediastinal contour is suboptimally assessed due to patient rotation . No bony injuries .
    OUTPUT:
    
Limited exam with cardiomegaly . No overt pneumonia or edema .