Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right subclavian venous catheter terminates in the mid SVC . At the lateral aspect of the left lung , it is difficult to discriminate between overlying soft tissue and a definite opacity within the left mid lung . The lungs are otherwise clear . The heart , mediastinum , hilum and pleura are normal . Note is made of some heterogeneity along the ribs , however evaluation is limited in this single frontal radiograph . For a more thorough evaluation , conventional radiographs should be obtained .
    OUTPUT:
    
Overlying soft tissue along the lateral aspect of the left lung is difficult to discriminate from a definite left mid lung opacity . Conventional radiographs should be considered if clinical concern is present .