Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear within normal limits . A pigtail catheter projects over the posterior base of the right side chest . , it s exact location uncertain . There is a small pleural effusion , partly loculated . This includes pleural thickening along the lateral side of the chest are . Although these findings are new of air in not necessarily acute and in the setting on chronicity of patchy new opacities in the right middle lobe and lingula is uncertain . Interstitium is mildly prominent throughout each lung which suggests are mild vascular congestion , however .
    OUTPUT:
    
1 . Mild interstitial process most suggestive of vascular congestion . 2 . Small loculated pleural effusion on the right with patchy densities which may be due to coinciding atelectasis . Although no recent prior radiographs are available , some of this appearance may be subacute or more chronic , although recent or ongoing infectious process is not excluded . 3 . Pigtail catheter posterior along the posterior base of the chest ; it s exact location with respect to the diaphragm is not well delineated by the radiographs but it is compatible with pleural placement .