Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tracheostomy is in place . Inspiratory volumes remain low . Compared to the prior study , there is new patchy interstitial and alveolar opacity at the left lung base . No definite change at the right base , with there is a small amount of pleural fluid and / or thickening , tenting of the hemidiaphragm , and infrahilar patchy opacity . No definite CHF . The cardiomediastinal silhouette is grossly unchanged , including thickening of the right paratracheal soft tissues , which appears confluent with dense pleural thickening or fluid at the right lung apex , as before . The right PICC line has been retracted . The tip now overlies the scapula , immediately outside the right lateral chest wall .
    OUTPUT:
    
New new patchy , predominantly alveolar opacity at the left lung base , more pronounced laterally . It is possible at this represents alveolar edema in the setting of an atypical distribution of CHF , but the differential diagnosis includes a pneumonic infiltrate . In the appropriate clinical setting , other alveolar opacities could have a similar appearance