Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 00 :44 is submitted .
    OUTPUT:
    
Lung volumes are markedly low . There is opacity at the right apex with elevation of the minor fissure suggesting partial collapse of the right upper lobe . Patchy opacity in the retrocardiac area is also seen and may represent atelectasis , although pneumonia can not be entirely excluded . As the left hemidiaphragm is partially obscured , there is possibly a small left effusion . The interstitium is prominent bilaterally but not significantly changed in appearance dating back to ___ favoring an underlying interstitial process rather than an acute infectious process . Clinical correlation is advised . Spinal hardware is again seen . No large pneumothorax .