Fig. 1
From: Three-dimensional visualization improves the endoscopic diagnosis of superficial gastric neoplasia
Definition of the concordance rate of lesion extent. a Endoscopic image of a gastric neoplasia using NBI. A superficial protruded-type lesion (adenoma) is evident on the lesser curve of the lower gastric body. b Delineation of the tumor margin is performed. The blue line is the tumor extent line drawn by a participant. c According to the histopathological findings, the tumor extent (red lines) is reconstructed on an endoscopic image. The white lines are the cutting lines of a resected specimen. d The calculation of the concordance rate of lesion extent. Yellow circles and yellow cross marks show coincident and non-coincident evaluating points, respectively. In this case, 16 of the 18 evaluation points were coincident, indicating a coincident rate of lesion extent of 88.9% (16/18)