نتایج جستجو برای: endoscope

تعداد نتایج: 3466  

Journal: :Optics letters 1996
G J Tearney S A Boppart B E Bouma M E Brezinski N J Weissman J F Southern J G Fujimoto

We describe a new optical coherence tomography catheter-endoscope for micrometer-scale, cross-sectional imaging in internal organ systems. The catheter-endoscope uses single-mode fiber optics with a novel transverse scanning design. The distal end of the catheter-endoscope uses a gradient-index lens with a microprism to emit and collect a single spatial-mode optical beam with specific focusing ...

Journal: :IEICE Electronic Express 2010
Muneki Nakada Chongho Chong Atsushi Morosawa Keiji Isamoto Takuya Suzuki Hiroyuki Fujita Hiroshi Toshiyoshi

This paper presents the first successful demonstration of all-optical MEMS (microelectromechanical system) fiber endoscope for OCT (optical coherence tomography) measurement. A MEMS optical scanner for spatial light modulation has been assembled in the endoscope probe head (φ 6mm) with optical components and a photovoltaic cell. Actuation energy for the MEMS scanner is optically supplied by usi...

2002
Kazuhide Hasegawa Kazufusa Noda Yukio Sato

In endoscope observation, acquiring shape information of a lesion area is highly demanded for objective and statistical judgment. For in-vivo applications, a high-speed measurement is also considerable. Therefore, we proposed an electronic endoscope system that equips an imagefiber and a laser scanner, and achieves the high-speed measurement by using the space-encoding method with laser-scannin...

Journal: :The Surgical technologist 1993
M J Stelck

Journal: :THE JOURNAL OF JAPAN SOCIETY FOR LASER SURGERY AND MEDICINE 1999

1997
Norimichi Tsumura Francisco H. Imai Toshiki Saito Hideaki Haneishi Yoichi Miyake

In this paper, a color difference is defined instead of the conventional color differences to evaluate gamut-mapping techniques for electronic endoscope images reproduced on CRT under environmental illuminant. This color difference is defined from Mahalanobis distance by using covariance matrices for differences of metric lightness, chroma and hue angle. The covariance matrices for endoscope im...

2017
Chen Xu Yu Li Xueting Jin Liang Yuan Hao Cheng

Energy consumed the in urban sector accounts for a large proportion of total world delivered energy consumption. Residential building energy consumption is an important part of urban energy consumption. However, there are few studies focused on this issue and that have simulated the energy consumption of residential buildings using questionnaire data. In this research, an eQUEST study was condu...

2011
Sun Young Kim Hong Sik Lee Jong Jin Hyun Min Ho Seo Sun Young Yim Ha Young Oh Hye Sook Kim Bora Keum Yeon Seok Seo Yong Sik Kim Yoon Tae Jeen Hoon Jai Chun Soon Ho Um Chang Duck Kim Ho Sang Ryu

BACKGROUND/AIMS Since endoscopes are reusable apparatus classified as semicritical item, thorough reprocessing to achieve high-level disinfection is of utmost importance to prevent spread of infection. To improve disinfection efficacy and safety, disinfectants and endoscope reprocessors are continuously evolving. This study aimed to compare the efficacy of the combination of polyhexamethylenebi...

2015
Rui Silva

Figure 1 The endoscope is inserted through the distal end of Several techniques for managing migrated and misplaced self-expanding esophageal metal stents have been described.1--5 However, most of these techniques apply only when there is distal stent dislodgment. When there is proximal stent migration or misplacement, and unless there is a lasso at the distal flange, trying to reposition the s...

Journal: :Chinese Journal of Electronics 2021

Compared with traditional endonasal endoscope, Virtual endoscope (VEE) is a computerized alternative solution the advantages of being non-invasive, affordable, no perforation, low risk infection, and high degree sensitivity. A Central path extraction algorithm based on Pre-planning roaming area (CPE-PRA) proposed to extract central nasal cavity model efficiently. And B-spline curve fitting Rela...

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