Magnifying Observation of Microvascular Architecture of Colorectal Lesions Using a Narrow‐band Imaging System

Sano, Yasushi; Horimatsu, Takahiro; Fu, Kuang I.; Katagiri, Atsushi; Muto, Manabu; Ishikawa, Hideki

doi:10.1111/j.1443-1661.2006.00621.x

Cited by 123 publications

(110 citation statements)

References 16 publications

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“…Vários estudos (5,14,18,21) têm demonstrado que a NBI com magnificação de imagens para a avaliação da malha capilar apresenta resultados semelhantes à cromoscopia com índigo-carmin associada à magnificação de imagens no diagnóstico diferencial das lesões colorretais. TISCHENDORF et al (21) , avaliando 200 pólipos colorretais por meio da NBI ou da cromoendoscopia com magnificação de imagens, demonstraram sensibilidade e especificidade para a diferenciação de lesões neoplásicas e não-neoplásicas de, respectivamente, 90,5% vs. 91,7% e 89,2% vs. 90%.…”

Section: Rotina Para Avaliação Dos Métodos De Imagem Associados à Magunclassified

“…Primeiramente, foi analisado o padrão da malha capilar, o qual poderia ser negativo (com vasos invisíveis, ou finos e discretamente visíveis), considerado o padrão para lesões não-neoplásicas, ou positivo (quando da presença de vasos mais calibrosos, alongados, tortuosos ou irregulares, e com arquitetura desorganizada), considerado padrão para lesões neoplásicas (3,4,14) . Os capilares foram considerados invisíveis quando não eram vistos na superfície das lesões ou eram extremamente opacos.…”

Section: Introductionunclassified

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Estudo comparativo entre MBI (FICE®) e a magnificação com índigo-carmin no diagnóstico diferencial de lesões neoplásicas e não-neoplásicas de cólon e reto

Santos¹,

Pereira-Lima

Lopes

et al. 2009

Arq. Gastroenterol.

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RESUMO -Contexto -O uso da cromoscopia virtual com sistema de imagem multibanda poderia auxiliar no diagnóstico in vivo de neoplasias colônicas. Objetivo -Avaliar a exatidão da magnificação associada à cromoendoscopia eletrônica ou com índigo-carmin na distinção entre lesões neoplásicas e não-neoplásicas do cólon e reto. INTRODUÇÃONos últimos anos, a magnificação de imagens com ou sem o emprego da cromoscopia, tem ganho grande importância como recurso propedêutico para endoscopia digestiva, em especial, da colonoscopia (6,9,11,16,19,20) . Maior precisão diagnóstica requer detecção de pequenas alterações estruturais ou de coloração (8) , que podem ser diagnosticadas por meio da colonoscopia de alta resolução aliada à magnificação de imagens. Esta tecnologia permite o aumento de uma porção da imagem e sua visualização com grande riqueza de detalhes, seja ela obtida óptica ou digitalmente. A imagem endoscópica depende dos comprimentos de onda da luz que são refletidos pelo tubo digestivo. O sistema FICE ® ("Fuji Intelligent Color Enhancement"), por meio de filtros específicos para diferentes combinações de comprimentos de onda entre o vermelho, o verde e o azul, converte imagens ópticas em imagens espectrais altamente contrastadas. Desta forma, o FICE ® se apresenta como verdadeiro método de cromoscopia virtual, dispensando o emprego de corantes, o que levaria a ganho de tempo, redução dos custos e maior praticidade durante a colonoscopia.Neste estudo, pretende-se comparar a precisão diagnóstica desta nova ferramenta com o método clássico de magnificação de imagens aliada à cromoscopia com índigo-carmin na distinção entre lesões neoplásicas e não-neoplásicas do cólon e reto. MÉTODOS

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Section: Rotina Para Avaliação Dos Métodos De Imagem Associados à Magunclassified

Section: Introductionunclassified

Estudo comparativo entre MBI (FICE®) e a magnificação com índigo-carmin no diagnóstico diferencial de lesões neoplásicas e não-neoplásicas de cólon e reto

Santos¹,

Pereira-Lima

Lopes

et al. 2009

Arq. Gastroenterol.

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“…Currently, the system is mainly used in digestive endoscopy for the pharynx, esophagus, stomach, and large intestine (12)(13)(14). Use of NBI in gynecology has been reported for laparoscopic identification of peritoneal endometriosis (15,16), evaluation of vascular density in endo- metriosis (17,18), and diagnosis of endometrial lesions (19)(20)(21).…”

Section: Discussionmentioning

confidence: 99%

Narrow band imaging hysteroscopy: A comparative study using randomized video images

Kisu

Banno

Kobayashi³

et al. 2011

Int J Oncol

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Abstract. Narrow band imaging (NBI) has been used in the gastrointestinal endoscopy field as a novel endoscopic imaging technique and has contributed to improved qualitative diagnosis and detection of lesions. However, there are only a few studies of use of NBI in the gynecology field. We applied NBI in flexible hysteroscopy at our outpatient clinic and evaluated the utility of NBI hysteroscopy for diagnosis of malignant endometrial lesions by comparison of the sensitivity and specificity between white light alone and white light+NBI using hysteroscopic video images. The subjects were 65 patients with a suspected endometrial lesion in the uterine cavity. These patients underwent flexible hysteroscopy using NBI in addition to conventional white light. Video images from 65 patients were edited into two groups, white light alone (WL group) and white light+NBI (NBI group) (130 images in total). Computerized block randomization of the order was then performed. Four raters independently diagnosed the images without use of other clinical information. Using the pathological diagnosis as the gold standard, we evaluated the sensitivity and specificity of diagnosis of atypical endometrial hyperplasia (AEH) or endometrial carcinoma compared between the WL and NBI groups. The sensitivity of diagnosis of AEH or endometrial carcinoma was numerically higher in the NBI group for all raters, and the average sensitivity was significantly higher in the NBI group compared to the WL group (78.6% vs. 63.7%, P<0.001). The specificity for each rater and the average specificity were comparable between the two groups. Compared to white light hysteroscopy, NBI hysteroscopy had a higher sensitivity for diagnosis of AEH or endometrial carcinoma without loss of specificity. This suggests that NBI hysteroscopy may be more useful than white light hysteroscopy for endoscopic diagnosis of malignant endometrial lesions. IntroductionIn hysteroscopy, the uterine cavity is directly observed using an endoscope. This method is used as a gynecological examination of the uterine cavity in patients with suspected endometrial lesions. Hysteroscopy is indicated for abnormalities detected in transvaginal ultrasonography and endometrial cytohistology, and in cases with metrorrhagia, hypermenorrhea, prolongation of menstruation, and infertility. Hysteroscopy has been suggested to be a superior examination for investigation of the uterine cavity (1,2), and high diagnostic accuracies for abnormalities in the uterine cavity (3) and endometrial carcinoma have been achieved in studies comparing hysteroscopy and histology (4,5). In contrast, Lasmar et al found sensitivities for diagnoses of endometrial hyperplasia (EH) and carcinoma using white light hysteroscopy of 56.3 and 80.0%, respectively, and suggested that this relatively poor performance of hysteroscopy may be due to a lack of standard diagnostic criteria based on morphological changes of endometrial lesions (6). Pathological examination of a biopsy specimen is recommended for diagnosis of endometrial lesio...

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“…Magnifying NBI endoscopy is referred to as 'optical biopsy', and a classification based on magnifying NBI for each internal organ has been proposed (17)(18)(19)(20)(21). Improvements in endoscopic imaging technology also allow clear visualization of cells and nuclei using endocytoscopy and endomicroscopy (17,22,23). These methods may allow evaluation as cytology and histology of biopsy specimens.…”

Section: Discussionmentioning

confidence: 99%

Flexible hysteroscopy with narrow band imaging (NBI) for endoscopic diagnosis of malignant endometrial lesions

et al. 2011

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Abstract. Narrow band imaging (NBI) for detection of blood vessels and microstructures on the mucosal surface is used in gastrointestinal endoscopy since it can improve qualitative diagnosis and detection of lesion. However, there are no studies on flexible hysteroscopy using NBI. We performed flexible hysteroscopy with NBI for outpatients to investigate the sensitivity and specificity of endoscopic diagnosis of malignant endometrial lesions. Of patients who attended our hospital for suspected lesions in the uterine cavity between April 2009 and May 2010, 104 subjects underwent hysteroscopy with NBI, in addition to white light. Using the pathological diagnosis as the gold-standard, we evaluated the sensitivity and specificity of NBI hysteroscopy for detecting atypical endometrial hyperplasia (AEH) or carcinoma. The results were also compared with historical data (n=209) for conventional hysteroscopy using white light only in 2008. The sensitivities were 97.2% [95% confidence interval (95% CI): 90.3-99.7%] and 82.6% (95% CI: 74.4-89.0%) for NBI hysteroscopy and conventional hysteroscopy, respectively. The 95% CIs for the two methods did not overlap and the sensitivity of lesion detection was higher with NBI hysteroscopy. Specificities were comparable, 90.6% (95% CI: 75.0-98.0%) and between the methods. NBI hysteroscopy has increased sensitivity for detection of atypical endometrial hyperplasia (AEH) or carcinoma. A comparison with historical data suggested that NBI may be useful for diagnosis of malignant endometrial lesions. As far as we are aware, this is the first evaluation of flexible hysteroscopy with NBI for diagnosis of malignant endometrial lesions.

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Magnifying Observation of Microvascular Architecture of Colorectal Lesions Using a Narrow‐band Imaging System

Cited by 123 publications

References 16 publications

Estudo comparativo entre MBI (FICE®) e a magnificação com índigo-carmin no diagnóstico diferencial de lesões neoplásicas e não-neoplásicas de cólon e reto

Estudo comparativo entre MBI (FICE®) e a magnificação com índigo-carmin no diagnóstico diferencial de lesões neoplásicas e não-neoplásicas de cólon e reto

Narrow band imaging hysteroscopy: A comparative study using randomized video images

Flexible hysteroscopy with narrow band imaging (NBI) for endoscopic diagnosis of malignant endometrial lesions

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