Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . There is no pleural effusion , focal consolidation or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . The heart size is normal . There is no pulmonary edema . Retrocardiac nodular opacity , best seen on the lateral view projecting over the spine , is new since prior exam .
    OUTPUT:
    
Retrocardiac nodular opacity is new since ___ exam and can be further assessed with dedicated chest CT .