Fig. 3: Assessment of SPE in vivo in a laryngectomy case.
From: Surgical polarimetric endoscopy for the detection of laryngeal cancer
a, Larynx imaged with WLE: 1, glottis (vocal cords); 2, supraglottis; 3, anterior commissure. b,c, Retardance and its intensity-reference image of the larynx. d,e, Depolarization and its intensity-reference image of the larynx. f, Magnified images of the cancerous and normal vocal cord (for those of the supraglottis, see Supplementary Fig. 6). g–h, Retardance and depolarization values within the cancerous, normal vocal cord (VC) and the cancerous and normal supraglottis. In the box plots, the red centre line denotes the median value and the blue box shows the 25th and 75th percentiles of the dataset. The black whiskers mark the non-outlier minimum and non-outlier maximum. P values were calculated via a two-sided Mann–Whitney U test for two-group comparison. i, RMS contrast between the cancerous and normal vocal cords in terms of retardance and depolarization revealed by the SPE and hue and saturation shown in WLE. For consecutive SPE imaging of this case, please refer to Supplementary Videos 3 and 4.
