Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Continued improvement of the left lateral retrocardiac opacity without resolution . Residual opacity is associated with bronchial wall thickening and questionable bronchial dilation . No pleural effusions , pulmonary edema or focal consolidation is seen , and the cardiac silhouette are normal . Tracheomegaly measuring approximately 3 .5 cm is seen at the proximal trachea .
    OUTPUT:
    
Further improvement in left lower lobe opacity without complete resolution . Recommend a repeat chest x-ray in approximately 4 weeks to ensure complete clearance .