Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are intact and aligned . A right IJ central venous catheter terminates in the low SVC . There is no pneumothorax . Right midlung linear atelectasis is unchanged . An asymmetric nodular opacity adjacent to the aortic knob is slightly more prominent today , and may be due to a confluence of shadows . Moderate cardiomegaly is unchanged . There is no pleural effusion .
    OUTPUT:
    
No significant interval change .