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Interobserver agreement for the detection of Barrett's esophagus with optical frequency domain imaging.

Abstract：

BACKGROUND:Optical frequency domain imaging (OFDI) is a second-generation form of optical coherence tomography (OCT) providing comprehensive cross-sectional views of the distal esophagus at a resolution of ~7 μm. AIM:Using validated OCT criteria for squamous mucosa, gastric cardia mucosa, and Barrett's esophagus (BE), the objective of this study was to determine the inter- and intra-observer agreements by a large number of OFDI readers for differentiating these tissues. METHODS:OFDI images were obtained from nine subjects undergoing screening and surveillance for BE. Sixty-four OFDI image regions of interest were randomly selected for review. A training set of 19 images was compiled distinguishing squamous mucosa from gastric cardia and BE using previously validated OCT criteria. The ten readers then interpreted images in a test set of 45 different images of squamous mucosa (n = 15), gastric cardia (n = 15), or BE (n = 15). Interobserver agreement differentiating the three tissue types and BE versus non-BE mucosa was determined using multi-rater Fleiss's κ value. The images were later randomized again and four readers repeated the test 3 weeks later to assess intraobserver reliability. RESULTS:All ten readers showed excellent agreement for the differentiation of BE versus non-BE mucosa (κ = 0.811 p < 0.0001) and for differentiating BE versus gastric cardia versus squamous mucosa (κ = 0.866, p < 0.0001). For the four readers who repeated the test, the median intraobserver agreement (BE vs. non-BE) was high (κ = 0.975, IQR: 0.94, 1.0). CONCLUSIONS:Trained readers have a high interobserver agreement for differentiating BE, squamous, and gastric cardia mucosa using OFDI.

journal_name

Dig Dis Sci

journal_title

Digestive diseases and sciences

authors

Sauk J,Coron E,Kava L,Suter M,Gora M,Gallagher K,Rosenberg M,Ananthakrishnan A,Nishioka N,Lauwers G,Woods K,Brugge W,Forcione D,Bouma BE,Tearney G

doi

10.1007/s10620-013-2625-x

subject

Has Abstract

pub_date

2013-08-01 00:00:00

pages

2261-5

issue

8

eissn

0163-2116

issn

1573-2568

journal_volume

58

pub_type

杂志文章

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