Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph obtained . Several calcified pleural plaques project over the lungs . There is no definite sign of pneumonia or CHF . No large effusion is seen , though the left CP angle is excluded . There is no pneumothorax . The heart is within normal limits of size . A retrocardiac density containing gas lucency is compatible with a hiatal hernia . The aorta is somewhat unfolded with partially calcified aortic knob . Bony structures appear intact with an old left mid clavicular shaft deformity .
    OUTPUT:
    
No signs of CHF or pneumonia . Hiatal hernia noted .