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Improved visibility of palisade vessels within Barrett’s esophagus using red dichromatic imaging: a retrospective cross-sectional study in Japan
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Chise Ueda, Shinwa Tanaka, Tetsuya Yoshizaki, Hirofumi Abe, Masato Kinoshita, Hiroya Sakaguchi, Hiroshi Takayama, Hitomi Hori, Ryosuke Ishida, Shinya Houki, Hiroshi Tanabe, Eri Nishikawa, Madoka Takao, Toshitatsu Takao, Yoshinori Morita, Takashi Toyonaga, Yuzo Kodama
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Received May 13, 2024 Accepted August 8, 2024 Published online November 11, 2024
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DOI: https://doi.org/10.5946/ce.2024.122
[Epub ahead of print]
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 Graphical Abstract
 Abstract
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 - Background
/Aims: Visualization of palisade vessels (PVs) in Barrett’s esophagus is crucial for proper assessment. This study aimed to determine whether red dichromatic imaging (RDI) improves PV visibility compared with white-light imaging (WLI) and narrow-band imaging (NBI).
Methods
Five expert and trainee endoscopists evaluated the PV visibility in Barrett’s esophagus using WLI, NBI, and RDI on 66 images from 22 patients. Visibility was rated on a 4-point scale: 4, excellent; 3, good; 2, fair; and 1, poor. The color difference between the most recognizable PV spots and surrounding areas with undetectable blood vessels was also analyzed.
Results
Mean visibility scores were 2.6±0.7, 2.3±0.6, and 3.4±0.4 for WLI, NBI, and RDI, respectively. The RDI scores were significantly higher than the WLI (p<0.001) and NBI (p<0.001) scores. These differences were recognized by trainees and expert endoscopists. Color differences in PVs were 7.74±4.96 (WLI), 10.43±5.09 (NBI), and 15.1±6.54 (RDI). The difference in RDI was significantly higher than that in WLI (p<0.001) and NBI (p=0.006).
Conclusions
RDI significantly improved PV visibility compared to WLI and NBI based on objective and subjective measures.
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