Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal portable chest radiograph demonstrates partial expansion of the previously noted left lower lobe collapse on prior study due to lobar collapse . There is a stable triangular - shaped opacification within the right hilus , corresponding with area of collapse better evaluated on the ___ CT . No other opacification is evident . Cardiomediastinal and hilar contours are unremarkable . No right - sided pleural effusion identified . Enteric catheter courses below left hemidiaphragm and out of view .
    OUTPUT:
    
Apparent increased opacification in left lower lung is actually likely due to partially improved aeration of the previously completely collapsed left lower lobe . In the absence of interval intervention , finding may be attributed to aggressive chest therapy .