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Fig. 8C —Bland and Altman plots show accuracy of prediction of lesion size
and distance of tumor to circumferential resection margin (CRM) using
histology as gold standard. Mean difference (solid line) and 95%
limits of agreement (hashed lines) are indicated in each graph.
Scatter graphs at top of all graphs show spread in all tumors; graphs at
bottom show spread with exclusion of mucinous tumors. From these we can see
that lesion length (A and B) is not well predicted. For all
tumors (A and B, top), there is a tendency to overestimate
lesion length by 5.4 mm, with wide range of 35 mm to 46 mm. For the more
important parameter, distances of tumor to CRM (C and D),
predictions are better. For all tumors (C and D, top) mean
difference between MRI and histology is only 0.2 mm and range is also narrow
(8 to 5 mm).
