Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . Patchy increased left basilar opacity could be seen with atelectasis , or potential pneumonia . A nodular component may reflect a left lower lobe nodule seen on the prior CT . There is probably a small new left - sided pleural effusion . The right lung remains clear . There is no pneumothorax . Small osteophytes are noted along the lower thoracic spine .
    OUTPUT:
    
No definite findings to explain right - sided chest pain , although there is increased posterior left basilar opacification including a new small pleural effusion . Atelectasis or possibly infection could be considered for this appearance .