Fig. 4

Correlation of BLI light signal (mean grey level intensity) and tumour volume in the para-pancreatic area determined post mortem. No significant correlation could be noted (Spearman rank correlation coefficient r = 0.2978, n.s.). A mild correlation is suggested by visual interpretation of the trend line. One larger lesion (16 mm³) remained undetected because it was covered by the left liver lobe