Endoscopic Observation of Tissue by Narrowband Illumination

Gono, Kazuhiro; Yamazaki, Kenji; Doguchi, Nobuyuki; Nonami, Tetsuo; Obi, Takashi; Yamaguchi, Masahiro; Ohyama, Nagaaki; Machida, Hirohisa; Sano, Yasushi; Yoshida, Shigeaki; Hamamoto, Yasuo; Endo, Takao

doi:10.1007/s10043-003-0211-8

Cited by 272 publications

(245 citation statements)

References 18 publications

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“…In the current study, we assigned the F1 filter (center wavelength), 415 nm; full width at half-maximum [FWHM], 30 nm) to the B channel, the F2 filter (center wavelength, 445 nm; FWHM, 30 nm) to the G channel, and the F3 filter (center wavelength, 500 nm; FWHM, 30 nm) to the R channel as described previously. 7 Thin blood vessels such as capillaries on the mucosal surface can be seen most clearly at 415 nm, the wavelength corresponding to the hemoglobin absorption band. 7 In contrast, thick vessels located in the deep layer of the mucosa cannot be seen at all at 415 nm.…”

Section: Principles Of Nbimentioning

confidence: 99%

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Squamous cell carcinoma in situ at oropharyngeal and hypopharyngeal mucosal sites

Muto

Nakane

Katada

et al. 2004

Cancer

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371

389

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BACKGROUND Head and neck squamous cell carcinoma typically is diagnosed at an advanced stage, and the prognosis for patients with this type of malignancy is poor. Detection of these lesions at an earlier stage (e.g., as carcinoma in situ) would be of clear benefit to patients. However, it has been extremely difficult to detect carcinoma in situ at head and neck mucosal sites during routine endoscopy, even after numerous passes of the endoscope through the oral cavity and the pharynx. METHODS The current clinical investigation was performed during routine endoscopic screening or surveillance procedures. The authors used a novel optical technique, known as narrowband imaging (NBI) that allows noninvasive visualization of the microvascular structure of an organ's surface using reflected light. RESULTS Between April 2002 and August 2003, 34 consecutive superficial lesions were found in 18 patients. Multifocal carcinoma was found in 5 patients (28%). The median age of the patients examined was 59.5 years (range, 43–71 years), and 83% of all patients were male. All lesions exhibited a microvascular proliferation pattern on magnified NBI. Thirteen patients with a combined total of 29 lesions underwent endoscopic resection under general anesthesia. The pyriform sinus was the most frequent primary site (66%; 19 of 29 lesions). The median tumor diameter was 20 mm (range, 1.3–40 mm). Twenty‐one lesions (72%) were histologically confirmed to be carcinoma in situ, and the remaining lesions showed evidence of microinvasion (0.05–1 mm) beneath the epithelium. Vascular invasion was observed in only one lesion. The median hospital stay was 10 days (range, 4–18 days). All patients were discharged without severe complications. After a median follow‐up period of 8 months (range, 1–16 months), there were no cases of local disease recurrence. CONCLUSION The authors stress the importance of endoscopic detection of superficial carcinoma at oropharyngeal and hypopharyngeal mucosal sites. NBI is a promising and potentially powerful tool for identifying carcinomas at an earlier stage during routine endoscopic examination. Cancer 2004. © 2004 American Cancer Society.

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Section: Principles Of Nbimentioning

confidence: 99%

“…7 Gono et al 7 reported that magnified NBI clearly enhanced the epithelial microvascular pattern. Furthermore, Inoue et al 8 and Kumagai et al 9 reported that the morphologic changes in microvascular structure were useful in the diagnosis of superficial esophageal carcinomas.…”

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confidence: 99%

Squamous cell carcinoma in situ at oropharyngeal and hypopharyngeal mucosal sites

Muto

Nakane

Katada

et al. 2004

Cancer

Self Cite

371

389

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“…5(7), 807-819 808 modalities have been newly developed to enhance the value of endoscopy in effective gastric cancer diagnosis. High definition endoscopy and image-enhanced endoscopy [8] including narrow band imaging (NBI) [9] are the key modalities, which are commercially available for an advanced endoscopy imaging in early gastric cancer. The next stage is real-time endoscopic assessment of histology ( optical biopsy) by endocytoscopy (ECS) [10,11] and confocal microendoscopy [12].…”

Section: Issn: 2320-5407mentioning

confidence: 99%

Early Detection of Gastric Carcinoma by Advance Endoscopic Procedure: An Update.

Kashe¹

2017

IJAR

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“…The chances of committing errors and misdiagnoses increase because the physicians are focused on a small part of the field for a long time. Gono et al proposed the narrow band image technology to overcome these drawbacks of traditional endoscope [10][11][12]. Atasoy et al [13] proposed an MRF-based matching technique that incorporates region-based similarities and spatial correlations of neighboring regions that are applied to narrow-band endoscopy for targeted optical biopsy.…”

Section: Introductionmentioning

confidence: 99%

A New Method of Stomach Tumor Recognition Based on Ultra Wideband Capsule Endoscopy

Chen¹,

Zhang²

2017

PIER C

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Abstract-In this paper, a new kind of capsule endoscopy with through-body radar is utilized for the first time. Finite difference time domain (FDTD) method is used to establish an electromagnetic simulation model of stomach. A technique based on the combination of improved back-projection (BP) algorithm and support vector machine (SVM) is proposed to solve the problems of rapidly recognizing tumor shapes in the stomach. In this technique, imaging data can be obtained using the improved BP algorithm and are classified by the SVM. The algorithm must consider the influence of various tissues in the human body: the attenuation of the signal strength of electromagnetic waves, the decrease in speed and the refraction due to the different permittivity between the different organs of the body. These factors will eventually lead to image offset, and even generate a virtual image. It is effective to refrain the displacement of image with modifying the time element of the imaging algorithm by iteration. Simulation results based on data from the model verify its feasibility and validity. Results further demonstrate that the resolution is extremely high. Tumor shapes, which have different sizes, positions, and quantities, can be reconstructed using this approach. When the data are contaminated by noises, the tumor shape in the stomach can still be suitably predicted, which demonstrates the robustness of the method. Finally, classification accuracy analysis for different sampling distances and sampling intervals shows that the effects of changing the distance and intervals on shape recognition are limited. The classification accuracy can also be improved by decreasing the sampling intervals or increasing the sampling distance.

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Endoscopic Observation of Tissue by Narrowband Illumination

Cited by 272 publications

References 18 publications

Squamous cell carcinoma in situ at oropharyngeal and hypopharyngeal mucosal sites

Squamous cell carcinoma in situ at oropharyngeal and hypopharyngeal mucosal sites

Early Detection of Gastric Carcinoma by Advance Endoscopic Procedure: An Update.

A New Method of Stomach Tumor Recognition Based on Ultra Wideband Capsule Endoscopy

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