Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously reported left retrocardiac opacities have essentially resolved with only minimal residual linear opacities remaining . Adjacent small left pleural effusion or pleural thickening is unchanged . Remainder of lungs are clear except for linear scar in the periphery of the right lung base . Cardiomediastinal contours are within normal limits and without change . Bones are diffusely demineralized , and note is made of mild scoliosis as well as mild compression deformities in the mid thoracic spine , unchanged .
    OUTPUT:
    
Essential resolution of left lower lobe pneumonia .