نتایج جستجو برای: optical imaging system

تعداد نتایج: 2807792  

2009
Jin Ho Jung Yong Choi Key Jo Hong Byung Jun Min Joon Young Choi Yearn Seong Choe Kyung-Han Lee Byung-Tae Kim

Several groups have reported the development of dual modality Gamma camera/optical imagers, which are useful tools for investigating biological processes in experimental animals. While previously reported dual modality imaging instrumentation usually employed a separated gamma camera and optical imager, we designed a detector using a position sensitive photomultiplier tube (PSPMT) that is capab...

2012
Shin Usuki

According to the industrial requirement for optical imaging, particularly in microscopic imaging, resolution improvement is one of the most important issues. In digital microscopic imaging, resolution of an optical system is limited by both optical parameters such as light wavelength and the objective lens numerical aperture and by spatial sampling such as pixel size of charge-coupled device ca...

2012
Rui Ma Sebastian Söntges Shy Shoham Vasilis Ntziachristos Daniel Razansky

The hybrid nature of optoacoustic imaging might impose limitations on concurrent placement of optical and ultrasonic detection components, especially in high resolution microscopic applications that require dense arrangements and miniaturization of components. This hinders optimal deployment of the optical excitation and ultrasonic detection paths, leading to reduction of imaging speed and spat...

2016
Myungjin Cho Bahram Javidi

In this paper, we review three-dimensional (3D) photon counting imaging with axially distributed sensing. Under severely photon-starved conditions, we have proposed various imaging and algorithmic approaches to reconstruct a scene in 3D, which are not possible by using conventional imaging system due to lack of sufficient number of photons. In this paper, we present an overview of optical sensi...

Journal: :iranian journal of medical physics 0
mohamad amin younessi heravi department of basic sciences, north khorasan university of medical sciences, boujnurd, iran.

introduction blood pressure (bp) is one of the important vital signs that need to be monitored for personal healthcare. arterial blood pressure is estimated from pulse transit time (ptt). this study uses two pulse sensors to get ptt. the aim of this study was to construct an optical system and to monitor blood pressure continuously and without cuff in people with different ages. materials and m...

2011
Shin Usuki

According to the industrial requirement for optical imaging, particularly in microscopic imaging, resolution improvement is one of the most important issues. In digital microscopic imaging, resolution of an optical system is limited by both optical parameters such as light wavelength and the objective lens numerical aperture and by spatial sampling such as pixel size of charge-coupled device ca...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه دانشهای بنیادی (مرکز تحقیقات فیزیک نظری و - پژوهشکده علوم نانو 1392

among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...

Journal: :Journal of biomedical optics 2012
Shanshan Liang Arya Saidi Joe Jing Gangjun Liu Jiawen Li Jun Zhang Changsen Sun Jagat Narula Zhongping Chen

We developed a multimodality fluorescence and optical coherence tomography probe based on a double-clad fiber (DCF) combiner. The probe is composed of a DCF combiner, grin lens, and micromotor in the distal end. An integrated swept-source optical coherence tomography and fluorescence intensity imaging system was developed based on the combined probe for the early diagnoses of atherosclerosis. T...

Journal: :Measurement science & technology 2013
James A Guggenheim Hector R A Basevi Jon Frampton Iain B Styles Hamid Dehghani

A multi-modal optical imaging system for quantitative 3D bioluminescence and functional diffuse imaging is presented, which has no moving parts and uses mirrors to provide multi-view tomographic data for image reconstruction. It is demonstrated that through the use of trans-illuminated spectral near infrared measurements and spectrally constrained tomographic reconstruction, recovered concentra...

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