Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . Patient is quite rotated to his right which limits the evaluation of the lower lungs and mediastinum . Allowing for this , there is no definite evidence of pneumonia or CHF . No large effusion or pneumothorax . The heart size appears stable . The mediastinal contour appears grossly unchanged . The bony structures are intact . Vascular calcifications project over the mediastinum .
    OUTPUT:
    
Limited exam without definite signs for acute pneumonia .