Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hazy opacity in the right mid-lung is likely due to overlying breast implant . Left lower lobe opacities are concerning for pneumonia . Furthermore , given leftward cardiac shift , an obstructive process in the left lower lobe can not be ruled out . A left PICC line is not well seen with the tip possibly in the lower SVC . The heart size is stable . No pneumothorax .
    OUTPUT:
    
1 . Persistent left lower lobe opacity with leftward cardiac shift is concerning for an obstructive pneumonia .