Comparison of the Diagnostic Usefulness of Conventional Magnification and Near-focus Methods with Narrow-band Imaging for Gastric Epithelial TumorsComparison of the Diagnostic Usefulness of Conventional Magnification and Near-focus Methods with Narrow-band Imaging for Gastric Epithelial Tumors
- Other Titles
- Comparison of the Diagnostic Usefulness of Conventional Magnification and Near-focus Methods with Narrow-band Imaging for Gastric Epithelial Tumors
- Authors
- 장희윤; 홍수진; 한재필; 박세경; 윤한결; 고봉진
- Issue Date
- 2015
- Publisher
- 대한상부위장관ㆍ헬리코박터학회
- Keywords
- Magnification; Epithelial tumor; Diagnosis; methods; Stomach
- Citation
- Korean Journal of Helicobacter and Upper Gastrointestinal Research, v.15, no.1, pp 39 - 43
- Pages
- 5
- Journal Title
- Korean Journal of Helicobacter and Upper Gastrointestinal Research
- Volume
- 15
- Number
- 1
- Start Page
- 39
- End Page
- 43
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/11433
- DOI
- 10.7704/kjhugr.2015.15.1.39
- ISSN
- 1738-3331
2671-826X
- Abstract
- Background/Aims: Dual-focus two-stage optical lens technology has been introduced recently. In near-focus mode (NFM), endoscopists can easily examine the mucosal tissue and capillary networks. This study compared the magnified images obtained using NFM and the conventional magnification method (CMM) under narrow-band imaging in patients with gastric epithelial tumors.
Materials and Methods: An experienced endoscopist performed endoscopy using NFM and CMM in patients with gastric epithelial tumors. We studied 40 images from 40 endoscopy sessions in 20 selected patients. Ten endoscopists rated the image quality independently on a 5-point Likert scale (from poor=1 to excellent=5) in terms of microsurface structure, microvascular structure, and the demarcation line.
Results: The gastric epithelial tumors comprised 10 cases of early gastric cancer, 2 of high-grade dysplasia, and 8 of low-grade dysplasia. The median number of magnified images for each method was 11. The mean observation time (±SD) for magnification was 99.9±64.1 s in NFM and 91.5±64.6 s in CMM (P=0.54). The image quality score for the microsurface structure was higher with NFM than CMM (4.09±0.39 vs. 3.73±0.40, P=0.015), while that for microvascular structure was lower with NFM than in CMM (3.53±0.45 vs. 4.29±0.45, P=0.001).
Conclusions: Magnification using NFM provides higher-quality images of the microsurface structure, although its optical zoom is limited compared with CMM. Since NFM can obtain magnified images easily by pushing a button on the scope, it is useful for evaluating gastric epithelial tumors.
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Collections - College of Medicine > Department of Internal Medicine > 1. Journal Articles
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