Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . Linear opacity identified at the left lung base partially obscuring the lateral costophrenic angle , this could be due to atelectasis , noting that superimposed infection can not be excluded in the proper clinical setting . Nodular opacity in the right mid lung is unchanged . There is an 8 mm nodular opacity projecting over the left lung base , not seen on prior . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormality identified .
    OUTPUT:
    
Linear left basilar opacity , potentially due to atelectasis , however , superimposed infection can not be excluded in the proper clinical setting . New 8 mm left basilar nodular opacity , new from prior . Nonurgent repeat with nipple markers suggested as this could represent a nipple shadow .