Optical coherence tomography ppt

We present theoretical and experimental results which demonstrate the superior sensitivity of swept source ss and fourier domain fd optical coherence tomography oct techniques over the conventional time domain td approach. It relies on exposing a sample to a burst of light and then measuring the reflective response from different depths and is therefore capable of scanning noninvasively beneath the surface of the sample. Optical coherence tomography angiography ppt xpowerpoint. Optical coherence tomographyprinciples and applications 251 it gives access to parameters like absorption coef. Optical coherence tomography is a quick, non invasive and reproducible imaging tool for macular lesions and has become an essential part of retina practice. Optical coherence tomography an overview sciencedirect. Optical coherence tomography oct is a noninvasive imaging test. Questioning optical coherence tomography ophthalmology. Optical coherence tomography oct is a diagnostic procedure that is used during cardiac catheterization. Abstract this paper explains the state of the art optical coherence tomography as an efficient diagnostic imaging tool for biomedical applications.

Optical coherence tomography oct is a commonly used imaging modality in the evaluation of glaucomatous damage. Optical coherence tomography imaging of macular oedema. Evaluation of clinical images is essential for diagnosis in many specialties. Optical coherence tomography is an officebased device that uses the reflection of infrared light from an exogenous source directed through the pupil off the back of the eye to quantify the thickness of retinal tissues, including the retinal nerve fiber layer and macula. Visante optical coherence tomography scleral lenses eye. Osa deeplearning based, automated segmentation of macular.

Optical coherence tomography the cardiology advisor. Optical coherence tomography angiography octa is a noninvasive imaging technique that is being developed to look at the blood vessels in the retina. Optical coherence tomography to optimize results of percutaneous coronary intervention in patients with nonstelevation acute coronary syndrome. Over the years, the clinical applications of oct have dramatically improved in sensitivity and specificity. Jan, 2016 the role of optical coherence tomography in coronary intervention. Introduction to optical coherence tomography oct obeluwa. Apr 22, 2017 i read with great interest the results of the ilumien iii trial by ziad ali and colleagues nov 26, p 261828,1 which did not show superiority for optical coherence tomography octguided percutaneous coronary intervention pci compared with angiographyguided pci.

Optical coherence tomography oct was first reported in 1991 as a non invasive, crosssectional ocular imaging technology huang et al. The salient features of oct are its noninvasive nature and its ability to image intraocular structures in vivo with resolution comparable to that of histological sections. Spectral domain optical coherence tomography sdoct is the second generation of optical coherence tomography. Optical coherence tomographyprinciples and applications. Background optical coherence tomography oct is a recently developed medical diagnostic technology that uses backreflected infrared light to perform in situ micron scale tomographic imaging.

Oct performs highresolution, crosssectional tomographic imaging of the internal microstructure in materials and biologic systems by measuring backscattered or backreflected light. We developed a convolutional neural network cnn that detects intraretinal fluid irf on oct in a manner. Using infrared light, optical coherence tomography enables detailed evaluation of coronary atherosclerotic plaques and of the vascular response to coronary interventional devices, such as new generation coronary stents. After its invention in the 1990s, oct is now being widely used in several branches of neuroscience as well as other fields of biomedical science. Optical coherence tomography seminar report, ppt for biomedical. Nov 12, 2012 optical coherence tomography oct was first reported in 1991, as a noninvasive ocular imaging technology. Unlike ultrasound, which uses sound waves to produce an image of the blood vessels, oct uses light. Its development started 25 years ago, under the impetus of the mit. Sensitivity advantage of swept source and fourier domain. Introduction optical coherence tomography oct technology allows the acquisition of crosssectional images of the retina with semihistologic resolution. Optical coherence tomography for the diagnosis and. Optical coherence tomography is a noninvasive imaging technology used to obtain high resolution crosssectional images of the retina.

Optical coherence tomographyseminar pptslidesreporttopics. Optical coherence tomography oct is an imaging modality that is widely employed in the evaluation of glaucomatous structural damage. In order to obtain xy resolution, the sample arm must be equipped with a 2d scanning system, typically. Optical coherence tomography guidance for percutaneous. There have been three basic approaches to optical tomography since the early 1980s. Optical coherence tomographyprinciples and applications 253. It permits to define the location and nature of the changes in the retina and adjacent structures and objectively evaluates the thickness of the retina and surrounding structures. Goldmans cecil medicine twenty fourth edition, 2012. About 50% of the rgcs occupy the perifoveal area of the macula. Optical coherence tomography for optical biopsy circulation. Explore optical coherence tomography with free download of seminar report and ppt in pdf and doc format. Nov 12, 2016 get optical coherence tomography seminar report and ppt in pdf and doc. Jul 20, 2014 introduction optical coherence tomography, or oct is a non contact, noninvasive imaging technique used to obtain high resolution 10 cross sectional images of the retina and anterior segment.

Therefore the development of computer vision algorithms to help analyze biomedical images will be important. Optical coherence tomography oct1,2 is an imaging technique which works similar to ultrasound, simply using light waves instead of sound waves. I read with great interest the results of the ilumien iii trial by ziad ali and colleagues nov 26, p 261828,1 which did not show superiority for optical coherence tomography octguided percutaneous coronary intervention pci compared with angiographyguided pci. Optical coherence tomography can also be used as guide for coronary intervention. For evaluating the cornea and anterior segment or front portion of the eye. Efficient reduction of speckle noise in optical coherence. This page contains embedded systems seminar and ppt with pdf report. The factors contributing to the market growth include growing aging population and advancement in technology.

In ophthalmology, optical coherence tomography oct is critical for managing retinal conditions. No difference was found in the primary endpointminimum stent area after pcibetween the two strategies p012. Optical coherence tomography oct is a noninvasive optical imaging technique that uses lowpower infrared laser light to image up to 2 mm beneath the skin surface. He firmly believes in practicing evidencedbased medicine and has a passion for teaching. As a noninvasive optical technique, oct allows for in vivo crosssectional views of both the onh and retina. Optical coherence tomographyprinciples and applications 241 contents page 1. The clinician can obtain realtime images of the architecture of the skin without pretreatment or gels. Optical coherence tomography, or oct, is a technique for obtaining subsurface images of translucent or opaque materials at a resolution equivalent to a lowpower microscope. Oct is typically implemented in fiber optics, where one of the mirrors in the interferometer is replaced by a 3d specimen. By using the timedelay information contained in the light waves which have been reflected from different depths inside a sample, an oct system can reconstruct a depthprofile of the sample structure. Optical coherence tomography oct is a noncontact, diagnostic method that uses infrared light, which allows the analysis of the retinal structure by means of highresolution. Optical coherence tomography seminar report, ppt, pdf. One is directed into the tissue being evaluated, while the other travels an equal length. Table 1 displays a technical comparison of the ivus and oct imaging methods.

Sep 03, 2017 introduction optical coherence tomography oct is a fundamentally new type of optical imaging modality. Intracoronary imaging continues to increase in use as both a diagnostic and intervention tool for pci guidance. With models for the full spectrum of care, theres a zeiss oct thats ideal for your practice. The decision to use optical coherence tomography oct or intravascular ultrasound ivus is sporadic in most institutions due to a lack of data from prospective clinical trials, added procedure time and possibly user unfamiliarity with the techniques.

Macular oedema me occurs in a wide variety of pathological conditions and accounts for different degrees of vision loss. The commercially available spectral domain sdoct offers benefits in glaucoma assessment over the earlier generation of time domainoct due to increased axial resolution, faster scanning speeds and has been reported to have improved reproducibility but similar diagnostic accuracy. Diabetic retinopathy optical coherence tomography scans. This allows your ophthalmologist to map and measure their thickness. Optical coherence tomography equipments market professional survey report 2018 this report studies optical coherence tomography equipments in global market, especially in north america, china, europe, southeast asia, japan and india, with production, revenue, powerpoint ppt presentation free to view. However, by following the luminal contour around vessel circumference, one can appreciate a trilaminar structure of the vessel wall 1 oclock, where the intima is seen as a bright, homogeneous, thin layer. Optical coherence tomography angiography currentpage. Enhanced depth imaging optical coherence tomography of intraocular tumors. Interpretation of optical coherence tomography images the.

Introduction optical coherence tomography oct is a fundamentally new type of optical imaging modality. Diagnosis of glaucoma and detection of glaucoma progression using spectral domain optical coherence tomography. With oct, doctors can obtain images of the blood vessels that are about the same as if they were looking under a microscope. Optical coherence tomography using the niris system in otolaryngology 1 optical coherence tomography using the niris system in otolaryngology. In this work, we investigate the ability of oct to perform micron scale tomographic imaging of the internal microstructure of in vitro atherosclerotic plaques.

He has lectured at numerous continuing educational courses on the topics of optical coherence tomography. Sensitivity advantage of swept source and fourier domain optical coherence tomography michael a. Prepercutaneous coronary intervention prepct oct can precisely determine plaque morphology, reference segments, and stent size. The layers within the retina can be differentiated and retinal thickness can be measured to aid in the early detection and diagnosis of retinal diseases and conditions. While the broad applicability of ultrasound imaging is due to its increased depth and fov exp dermatol 2016. Optical coherence tomography oct is a basically new type of optical imaging technique. Aug 28, 2018 optical coherence tomography oct is the machine which can actually measure the thickness of the retina, and that is why it has become so popular in glaucoma workup. The well known speckle removal techniques are either sensitive to sample motion, require sophisticated and expensive sample tracking systems, or involve sophisticated numerical procedures. Marc rubinstein, md, william b armstrong, md, hamid r djalilian, md, roger l crumley, md, mba, jason h kim, md, quoc a nguyen, md, allen i foulad, bs, pedram e ghasri, bs, brian jf wong, md, phd. Click to allow flash after you enable flash, refresh this page and the. Huge list of latest ieee seminar ppt,seminar reports,papers, ppt topics and general seminar topics, pdf, doc and presentation ideas for b. Optical coherence tomography seminar report, ppt, pdf for. This allows your ophthalmologist to map and measure their. May 31, 2014 the interpretation of the optical coherence tomography oct image provided by dennis wong and colleagues1 suggests a plaque rupture with superimposed thombus in one of the lesions.

Optical coherence tomography in agerelated macular. Optical coherence tomography seminar report, ppt for. This means that the decrease in macular thickness would be the earliest pointer for the detection of glaucoma. Optical coherence tomography has become established as an imaging modality in clinical ophthalmology and is finding applications in even gastrointestinal and dermatological arenas. Intravascular ultrasound versus optical coherence tomography. Optical coherence tomography provides both qualitative morphology and reflectivity and quantitative thickness, mapping and volume analyses of the examined tissues insitu and in real time.

These capabilities allow detection of newly emerging fluid and. Oct is a noninvasive, nonradiative optical diagnostic tool based on interferometers. In optical coherence tomography oct, light is split into 2 separate paths. The first clinical studies using this innovative technology were published in 2014. Intracoronary optical coherence tomography oct provides detailed characterization of the arterial wall complimentary to angiography. Optical coherence tomography is a diagnostic tool for high. Crosssectional images of the cornea, anterior chamber, and others. It is effectively optical ultrasound, imaging reflections from within tissue to provide crosssectional images. However, by following the luminal contour around vessel circumference, one can appreciate a trilaminar structure of the vessel wall 1 oclock, where the intima is seen as a bright, homogeneous, thin. Between 30 to 40 million oct imaging procedures are performed per year in ophthalmology. Based on polarization properties, oct can differentiate tissue characteristics fibrous, calcified, or lipidrich plaque and identify thincap fibroatheroma. Introduction optical coherence tomography, or oct is a non contact, noninvasive imaging technique used to obtain high resolution 10 cross sectional images of the retina and anterior segment. Optical coherence tomography oct is an imaging technique that is similar in principle to ultrasound, but with superior resolution. Apr, 2015 optical coherence tomography seminar and ppt with pdf report.

Interpretation of optical coherence tomography images. The photoacoustic modality employs an akinetic optical sensor with a large imaging window. Introduction optical coherence tomography, or oct is a non contact, noninvasive imaging technique used to obtain high resolution 10. This imaging window enables direct reflection mode operation, and a seamless integration of optical coherence tomography oct as a second imaging modality.

View and download powerpoint presentations on optical coherence tomography angiography ppt. Its biggest application in cardiovascular medicine currently is in the coronary vasculature and to a lesser extent coronary graft assessment. Optical coherence tomography angiography wikipedia. Optical coherence tomography oct is a new diagnostic imaging technique that produces cross. Optical coherence tomography department of ophthalmology. Optical coherence tomography an overview sciencedirect topics. Get optical coherence tomography seminar report and ppt in pdf and doc. Spectral domain optical coherence tomography in glaucoma.

Speckle pattern, which is inherent in coherence imaging, influences significantly axial and transversal resolution of optical coherence tomography oct instruments. Lee vien practices in a hospitalbased setting and serves as the student coordinator and residency mentor for optometry students and residents. We present a dual modality functional optical coherence tomography and photoacoustic microscopy octpam system. As of 2018, with further work it is hoped that it will one day be useful to diagnose diabetic retinopathy. Oct optical coherence tomography medical technology. We show that ss and fdoct have equivalent expressions for system signaltonoise ratio which result in a typical sensitivity advantage of 2030db over tdoct. Early detection of me is therefore critical for diagnosis and therapeutic management. Zeiss cirrus hdoct advanced retinal imaging from cliff williams, kirkcaldy, fife, scotland duration. As of 2018, with further work it is hoped that it will one day be useful to diagnose diabetic retinopathy octa uses low coherence interferometry to measure changes in backscattered signal intensity or amplitude in order to differentiate areas.

With oct, your ophthalmologist can see each of the retinas distinctive layers. Crosssectional tissue images of these ocular structures can be generated in vivo. Also get the seminar topic paper on optical coherence tomography with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year ieee biomedical engineering, biotechnology in btech, be, mtech students for the year 2016 2017. Optical coherence tomography of retinal and choroidal tumors. The speed, precision, and cost benefits of optical coherence tomography are beginning to attract the interest of industrial end users. Also explore the seminar topics paper on optical coherence tomography with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year ieee biomedical engineering, biotechnology in btech, be, mtech students for the year 2015 2016. Optical coherence tomography oct is a novel, noninvasive, micrometerscalesolution tomography, which use coherent light to obtain crosssectional images of specific samples, such as biological tissue.

Optical coherence tomography oct is a noninvasive imaging technique widespread in the medical world, especially in ophthalmology. Intracoronary optical coherence tomography 2018 jacc. Optical coherence tomography is a micrometerscale imaging modality that permits labelfree, crosssectional imaging of biological tissue microstructure using tissue backscattering properties. Advantage of nextgeneration frequencydomain optical coherence tomography compared with conventional timedomain system in the assessment of coronary lesion. Optical coherence tomography oct is a revolutionary tool that plays a key role in the management of various retinal pathologies.

Optical coherence tomography oct is an optical analog of intravascular ultrasound ivus that can be used to examine the coronary arteries and has 10fold higher resolution than ivus. Optical coherence tomography seminar and ppt with pdf report. Oct uses light waves to take crosssection pictures of your retina. Optical coherence tomography oct is the optical analog of ultrasound imaging and is a powerful imaging technique that enables noninvasive, in vivo, high resolution, crosssectional imaging in biological tissue. Optical coherence tomographyseminar pptslidesreport. Optical coherence tomography seminar ppt and pdf report. Current applications of optical coherence tomography in. Ppt optical coherence tomography 3d measurements in vivo. Optical coherence tomography optical coherence tomography oct is a noninvasive imaging technique widespread in the medical world, especially in ophthalmology. A complete list of ocular diseases with optical coherence. Optical coherence tomography oct produces images are similar to ultrasound technology.

Since then, oct imaging technology and capabilities have. Optical coherence tomography oct solutions from zeiss are designed to deliver sophisticated applications that address rapidlyevolving requirements for diagnostics in multiple patient populations. Intravascular ultrasound intracoronary imaging icr journal. Analogous to ultrasound, except that it measures intensity of backreflected light. Thus, the depthinformation is provided by virtue of the lci discussed above. For the fits intracoronary optical coherence tomography.

In a medium with high optical anisotropy, for example, the aperture cannot ef. Ppt optical coherence tomography powerpoint presentation. Oct for glaucoma diagnosis, screening and detection of. Background optical coherence tomography oct 1,2 is an imaging technique which works similar to ultrasound, simply using light waves instead of sound waves. Find powerpoint presentations and slides using the power of, find free presentations research about optical coherence tomography angiography ppt. Spectral domain optical coherence tomography in the diagnosis and management of glaucoma. Optical coherence tomography texas heart institute. Optical coherence tomography ppt linkedin slideshare. Octa technology uses laser light reflectance of the surface of moving red blood cells to accurately depict. Oct its principles, types, interpretation with respect to macular scan.

Intravascular ultrasound ivus and optical coherence tomography oct are commonly used methods, while newer spectroscopic methods are under development. This dependence, however, is not as pronounced as the dependence on the optical anisotropy. The use of optical rather than acoustic waves, however, enables high resolution in the posterior segment of the eye in a non. Oct has been widely used in numerous clinical applications, including gastroenterology 24, ophthalmology 57, dermatology 8,9, and dentistry 10,11. Optical coherence tomography oct is an optical analog of ultrasound imaging that uses low coherence interferometry to produce crosssectional images of the.