Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph provided . The patient 's chin projects over the lung apices and superior mediastinum limiting assessment . The previously noted left IJ central venous catheter is not visualized nor is the previously visualize right upper extremity access PICC line . Chronic right rib cage deformity again noted . Cardiomediastinal silhouette is unchanged with a markedly unfolded thoracic aorta . The lungs appear clear .
    OUTPUT:
    
PICC line not visualized . Left IJ central venous catheter not visualized . Limited exam due to patient 's chin projecting over the upper chest .