Table 1. Visual classification of endobronchial findings during autofluorescence bronchoscopy.

Grade	AFI
Normal	Green image with normal endobronchial architecture
Abnormal but not suspicious	Slight decrease in fluorescence, with poorly defined margins; dark green or faint magenta image
Suspicious for intraepithelial neoplasia	Definite decrease in fluorescence, with clearly defined margins; magenta image; clear distortion of endobronchial architecture
Tumor	Visible endobronchial tumor, magenta colored