Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 4 - mm nodule is not seen on this chest radiograph . No outside CT is available for comparison . If comparison is available , please upload and we will re-review the radiograph , although a 4 mm nodule is likely below the resolution of radiograph . There are vascular clips in the right axilla . Lungs are essentially clear , except atelectasis at the left lung base . Cardiomediastinal silhouette is top normal . No pleural effusions or pneumothoraces .
    OUTPUT:
    
No evidence of pulmonary nodule on this radiograph .