Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is technically limited by low lung volumes and inability to raise the left arm for the lateral view . A 2 .6 cm diameter , well - defined rounded opacity is present in the right upper lobe overlying the intersection of the right first anterior and right fourth posterior ribs , just above the right hilum . The lungs are otherwise remarkable for patchy and linear opacities at the left base suggestive of atelectasis or scarring . Heart size is normal , and mediastinal and hilar contours are within normal limits allowing for accentuation by low lung volumes . There are no pleural effusions or acute skeletal findings .
    OUTPUT:
    
2 .6 cm diameter right upper lobe nodule , for which chest CT is recommended for further characterization as communicated by telephone to Dr . ___ at 10 : 10 a .m . on ___ at the time of discovery .