Diagnosis of elevated-type early gastric cancers by the optimal band imaging system

Yoshizawa, Mitsuyo; Osawa, Hiroyuki; Yamamoto, Hironori; Kita, Hiroto; Nakano, Hidetoshi; Satoh, Kiichi; Shigemori, Masato; Tsukui, Mamiko; Sugano, Kentaro

doi:10.1016/j.gie.2008.09.007

Cited by 32 publications

(36 citation statements)

References 26 publications

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“…The EG-590ZW scope can magnify endoscopic images optically up to 135-fold [5][6][7] through the use of a zoom attachment. It is easy to change wavelengths in each endoscopic procedure, because the system allows selection of a setting from up to ten possible settings.…”

Section: Instrument Specifications and Selection Of A Set Of Wavelengthsmentioning

confidence: 99%

“…It is easy to change wavelengths in each endoscopic procedure, because the system allows selection of a setting from up to ten possible settings. Osawa et al [5] and Yoshizawa et al [6,7] at the Jichi Medical University in Japan selected the best setting that enhances the demarcation lines more strongly between cancerous lesions and surrounding areas in the case of EGC without magnification. For most cases of gastric cancer, the best images were obtained with use of a specific combination of the following three wavelengths: 470 nm for blue (B), 500 nm for green (G), and 550 nm for red (R) that also produces a brighter image of various types of gastric cancers, that is, depressed, flat and elevated type.…”

Section: Instrument Specifications and Selection Of A Set Of Wavelengthsmentioning

confidence: 99%

“…Magnified FICE images are quite useful for an accurate diagnosis for EGC and determination of extent of EGC [5][6][7] . The irregular microstructural or nonstructural pattern is clearly identified on the tumor surface with magnification, despite the morphological types of EGC ( Figures 1-4 and 6).…”

Section: Determination Of the Extent Of Egc With Magnified Fice Imagesmentioning

confidence: 99%

“…The irregular microstructural or nonstructural pattern is clearly identified on the tumor surface with magnification, despite the morphological types of EGC ( Figures 1-4 and 6). Such patterns were found in none of the surrounding mucosa, resulting in the accurate demarcation line [5][6][7] . In addition, the irregular microvascular pattern of lesions is clearly visualized with half magnification ( Figure 6).…”

Section: Determination Of the Extent Of Egc With Magnified Fice Imagesmentioning

confidence: 99%

“…Additionally, FICE provides optimal band image with the same light intensity as conventional endoscope, implying that the FICE system can display clear images even without magnification. Indeed, FICE can facilitate detection of changes in EGC without magnification and confirm accurately the diagnosis of cancer with low or half magnification [5][6][7] . Endoscopic submucosal dissection (ESD) was developed in the past 10 years as a more reliable method of endoscopic resection than endoscopic mucosal resection (EMR) [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

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Diagnosis of extent of early gastric cancer using flexible spectral imaging color enhancement

Osawa

Yamamoto²,

Mıura³

et al. 2012

WJGE

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The demarcation line between the cancerous lesion and the surrounding area could be easily recognized with flexible spectral imaging color enhancement (FICE) system compared with conventional white light images. The characteristic finding of depressed-type early gastric cancer (EGC) in most cases was revealed as reddish lesions distinct from the surrounding yellowish noncancerous area without magnification. Conventional endoscopic images provide little information regarding depressed lesions located in the tangential line, but FICE produces higher color contrast of such cancers. Histological findings in depressed area with reddish color changes show a high density of glandular structure and an apparently irregular microvessel in intervening parts between crypts, resulting in the higher color contrast of FICE image between cancer and surrounding area. Some depressed cancers are shown as whitish lesion by conventional endoscopy. FICE also can produce higher color contrast between whitish cancerous lesions and surrounding atrophic mucosa. For nearly flat cancer, FICE can produce an irregular structural pattern of cancer distinct from that of the surrounding mucosa, leading to a clear demarcation. Most elevatedtype EGCs are detected easily as yellowish lesions with clearly contrasting demarcation. In some cases, a partially reddish change is accompanied on the tumor surface similar to depressed type cancer. In addition, the FICE system is quite useful for the detection of minute gastric cancer, even without magnification. These new contrasting images with the FICE system may have the potential to increase the rate of detection of gastric cancers and screen for them more effectively as well as to determine the extent of EGC.

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Section: Instrument Specifications and Selection Of A Set Of Wavelengthsmentioning

confidence: 99%

Section: Instrument Specifications and Selection Of A Set Of Wavelengthsmentioning

confidence: 99%

Section: Determination Of the Extent Of Egc With Magnified Fice Imagesmentioning

confidence: 99%

Section: Determination Of the Extent Of Egc With Magnified Fice Imagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diagnosis of extent of early gastric cancer using flexible spectral imaging color enhancement

Osawa

Yamamoto²,

Mıura³

et al. 2012

WJGE

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Preoperative Work-up: Endoscopy and Endoscopic Ultrasonography

Bendia

Marzioni²,

Sario³

et al. 2012

Surgery in the Multimodal Management of Gastric Cancer

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Linked color imaging improves identification of early gastric cancer lesions by expert and non-expert endoscopists

et al. 2022

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Background and aims Early gastric cancer (EGC) lesions are often subtle and endoscopically poorly visible. The aim of this study is to evaluate the additive effect of linked color imaging (LCI) next to white-light endoscopy (WLE) for identification of EGC, when assessed by expert and non-expert endoscopists. Methods Forty EGC cases were visualized in corresponding WLE and LCI images. Endoscopists evaluated the cases in 3 assessment phases: Phase 1: WLE images only; Phase 2: LCI images only; Phase 3: WLE and LCI images side-to-side. First, 3 expert endoscopists delineated all cases. A high level of agreement between the expert delineations corresponded with a high AND/OR ratio. Subsequently, 62 non-experts indicated their preferred biopsy location. Outcomes of the study are as follows: (1) difference in expert AND/OR ratio; (2) accuracy of biopsy placement by non-expert endoscopists; and (3) preference of imaging modality by non-expert endoscopists. Results Quantitative agreement between experts increased significantly when LCI was available (0.58 vs. 0.46, p = 0.007). This increase was more apparent for the more challenging cases (0.21 vs. 0.47, p < 0.001). Non-experts placed the biopsy mark more accurately with LCI (82.3% vs. 87.2%, p < 0.001). Again this increase was more profound for the more challenging cases (70.4% vs. 83.4%, p < 0.001). Non-experts indicated to prefer LCI over WLE. Conclusion The addition of LCI next to WLE improves visualization of EGC. Experts reach higher consensus on discrimination between neoplasia and inflammation when using LCI. Non-experts improve their targeted biopsy placement with the use of LCI. LCI therefore appears to be a useful tool for identification of EGC. Graphical abstract

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Diagnosis of elevated-type early gastric cancers by the optimal band imaging system

Cited by 32 publications

References 26 publications

Diagnosis of extent of early gastric cancer using flexible spectral imaging color enhancement

Diagnosis of extent of early gastric cancer using flexible spectral imaging color enhancement

Preoperative Work-up: Endoscopy and Endoscopic Ultrasonography

Linked color imaging improves identification of early gastric cancer lesions by expert and non-expert endoscopists

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