Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There are bibasilar opacities identified , similar to prior exam . Some irregular linear component is seen at the lateral aspect at the left lung base which is more conspicuous than on ptiot . Superiorly , the lungs are clear . There is no pulmonary vascular congestion . Trace bilateral effusions likely present given blunting of the posterior costophrenic angles . The cardiomediastinal silhouette is unchanged , notable for mild cardiomegaly . No acute osseous abnormality is detected .
    OUTPUT:
    
Bibasilar opacities more conspicuous linear opacities at the left lung base . Findings may be due to pneumonia . Recommend repeat after treatment to document resolution of the findings .