Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Status post thoracotomy , moderate cardiac enlargement and evidence of aortic valve prosthesis as well as tricuspid valve annuloplasty as before . The removal of the right - sided pleural effusion of the preceding day remains successful as the right - sided diaphragmatic contour and pleural sinus is free , demonstrating the pigtail - end catheter in unchanged position . No pneumothorax has developed . The pulmonary vascular pattern again demonstrates perivascular haze throughout which in comparison appears slightly increased again . This may have led to question a left - sided pneumonia , a diagnosis which is questionable .
    OUTPUT:
    
Persistent successful status post right - sided thoracocentesis , mildly increasing pulmonary congestive pattern with perivascular haze . Diagnosis of left - sided pneumonic infiltrate is questionable unless compelling clinical findings are present .