Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mild to moderately enlarged . The aorta is tortuous . The hila bilaterally are somewhat prominent , and this could be due to underlying pulmonary arterial hypertension . There is no pulmonary vascular congestion . A peripheral triangular opacity within the left lung base could reflect an area of infarction though infection is not excluded . Small left pleural effusion is also demonstrated . No pneumothorax is seen . Mild multilevel degenerative changes are noted in the thoracic spine . No displaced fractures are identified .
    OUTPUT:
    
Peripheral triangular opacity within the left lung base could reflect an area of infarction or infection , with small left pleural effusion . A chest CTA is suggested for further assessment if there is concern for pulmonary embolism . No displaced rib fractures are seen .