Diagnostic Imaging of Ophthalmology


Book Description

This atlas is a pocket manual of imaging diagnosis of the orbital. It includes common imaging techniques, normal imaging features, abnormal orbital imaging of developmental diseases, injury, inflammation, lymphoproliferative diseases, diseases of the eyeball, post-operative changes, vascular diseases, tumors and neuro-ophthalmological diseases. While it particularly focuses on CT and MRI, it also describes other techniques, such as X-ray, ultrasonography and nuclear imaging. The book starts with an overview of commonly used imaging techniques of the orbit a concise description of imaging features of normal orbit in X-ray, CT and MRI. The following nine chapters explore different orbital diseases and abnormalities that are common in clinical work. It is a valuable resource for radiologists and ophthalmologists.




High Resolution Imaging in Microscopy and Ophthalmology


Book Description

This open access book provides a comprehensive overview of the application of the newest laser and microscope/ophthalmoscope technology in the field of high resolution imaging in microscopy and ophthalmology. Starting by describing High-Resolution 3D Light Microscopy with STED and RESOLFT, the book goes on to cover retinal and anterior segment imaging and image-guided treatment and also discusses the development of adaptive optics in vision science and ophthalmology. Using an interdisciplinary approach, the reader will learn about the latest developments and most up to date technology in the field and how these translate to a medical setting. High Resolution Imaging in Microscopy and Ophthalmology – New Frontiers in Biomedical Optics has been written by leading experts in the field and offers insights on engineering, biology, and medicine, thus being a valuable addition for scientists, engineers, and clinicians with technical and medical interest who would like to understand the equipment, the applications and the medical/biological background. Lastly, this book is dedicated to the memory of Dr. Gerhard Zinser, co-founder of Heidelberg Engineering GmbH, a scientist, a husband, a brother, a colleague, and a friend.




Diagnostics in Ocular Imaging


Book Description

This book presents a new avenue in the field of ophthalmology and sheds light on the field of eye imaging. With the increasing availability of electronic devices and their important role in both personal and professional aspects of human life, there is a growing need for perfect vision. Ophthalmic imaging is a major tool for screening and documenting eye diseases in both medical and surgical fields of ophthalmology and is also of use for ophthalmologists around the globe. The number of eye-imaging devices has increased dramatically, however undiagnosed or poorly managed eye diseases remain a significant cause of ocular and visual problems worldwide. This essential guide addresses the need for a book that is dedicated to ophthalmic imaging, covering the cornea, glaucoma, retina and orbital imaging with updates on medical and surgical aspects of the topic.




Diagnostic and Imaging Techniques in Ophthalmology


Book Description

Advances made in diagnostic and imaging tech¬niques within the past years have revolutionized the clinical approach to, and the management of many ophthalmic diseases. Wavefront and Optical Coherence Tomography (OCT) have been incorporated as basic tools of refractive surgery, in the assessment of vitreoreti¬nal disorders, optic nerve pathologies, ocular tumors and ocular trauma. This book presents a comprehensive evaluation of current and emerging technologies used for clinical assessment in ophthalmology, as well as an in depth discussion of retinal angiography, both anterior and exterior segments, OCT, VHF ultrasound and other advanced imaging methods and techniques.




Imaging of Orbital and Visual Pathway Pathology


Book Description

Deals with imaging of pathology of the visual system. This book is divided into two parts, general and special. In the general part, important basics of modern imaging methods are discussed. The knowledge on the indication, technique, and results of functional MR imaging is also presented.




Feline Diagnostic Imaging


Book Description

Vorrangig werden radiologische und Ultraschallverfahren vorgestellt. Komplexere Bildgebungsverfahren wie Computertomographie und MRT werden ebenfalls präsentiert. Das Referenzwerk enthält mehr als 1.750 hochwertige Abbildungen und ist eine wahre Fundgrube für Veterinärmediziner, die sich insbesondere auf die Behandlung von Katzen spezialisiert haben. Feline Diagnostic Imaging beschäftigt sich zunächst mit der Auswertung von unauffälligen und pathologischen Röntgenaufnahmen des Thorax, Abdomens und des Bewegungsapparats. Im Anschluss werden Diagnosen aus gängigen echokardiographischen und Ultraschalluntersuchungen erläutert. Auch beschreibt das Referenzwerk bildgebende Untersuchungen des Schädels mittels Computertomographie sowie Gehirn- und Wirbelsäulenerkrankungen, die über ein MRT erkannt werden können. - Präsentiert bildgebende Techniken und konzentriert sich dabei auf die Anforderungen bei der Untersuchung von Katzen. - Legt den Schwerpunkt auf gängige Verfahren, behandelt aber auch komplexere Bildgebungstechniken. - Gibt einen vollständigen Überblick über diagnostischen Imaging-Verfahren bei Katzen. - Mit einer Fülle von Tipps und Tricks für die Behandlung von Katzen. - Ein Muss für Veterinärmediziner, die sich auf Katzen spezialisiert haben. Feline Diagnostic Imaging legt in einzigartiger Weise der Fokus auf Katzen und ist daher ein Muss für Veterinärmediziner, die ihre Kompetenzen bei diagnostischen Bildgebungsverfahren verbessern möchten. Das Buch eignet sich ebenfalls hervorragend für Fachtierärzte für Radiologie, Studenten der Veterinärmedizin und Kliniker.




Ophthalmic Imaging


Book Description

Ophthalmic Imaging serves as a reference for the practicing ophthalmic imager. Ophthalmic imaging combines photography and diagnostic imaging to provide insight into not only the health of the eye, but also the health of the human body as a whole. Ophthalmic photographers are specialists in imaging through and in the human eye, one of the only parts of the body where the circulation and nervous system is visible non-invasively. With technical perspective as context, this book will provide instructional techniques as well as the background needed for problem solving in this exciting field. The book covers all aspects of contemporary ophthalmic imaging and provides image support to ophthalmologists and sub-specialties including retinal specialists, corneal specialists, neuro-ophthalmologists, and ocular oncologists. This text serves as a reference for the practicing ophthalmic imager, or to imagers just getting started in the field.




Noninvasive Diagnostic Techniques in Ophthalmology


Book Description

Noninvasive Diagnostic Techniques in Ophthalmology explores the special noninvasive tools developed to function as diagnostic indicators and to further our understanding of ocular function. The volume's focus is on new development in instrumentation and techniques for studying the cornea, lens, retina, vitreous, and aqueous dynamics; whereby special attention is given to how each technique has improved our understanding of basic processes and diagnostic capability. Theoretical aspects, possible sources of error, current problems and limitations, safety evaluation, and future applications and directions are considered. Topics examined include ophthalmic image processing; magnetic resonance imaging of the eye and orbit; diagnostic ocular ultrasound; corneal topography; holographic contour analysis of the cornea; wide field and color specular microscopy; use of the Fourier transform method for statistical evaluation of corneal endothelial morphology; confocal microscopy; in vivo corneal redox fluorometry; evaluation of cataract function with the Scheimp-flug camera; fluorescence and Raman spectroscopy of the crystallin lens; in vivo uses of quasi-elastic light scattering; fundus reflectometry; and clinical visual psychophysics measurements. The book offers discussions of fractal analysis of human retinal blood vessel patterns, scanning laser tomography of the living human eye, fundus imaging and diagnostic screening for public health, and digital image processing for ophthalmology, as well as a detailed appendix comprising additional topics and sources.




Neuroimaging in Ophthalmology


Book Description

The goal of the second edition of this Monograph is to reinforce the critical importance of accurate, complete, and timely communication--from the prescribing ophthalmologist to the interpreting radiologist--of the clinical findings, differential diagnosis, and presumed topographical location of the suspected lesion in order for the radiologist to perform the optimal imaging study, and ultimately, to receive the best interpretation. Johnson, Policeni, Lee, and Smoker have updated the original content and summarized the recent neuroradiologic literature on the various modalities applicable to CT and MR imaging for ophthalmology. They emphasize vascular imaging advances (e.g., MR angiography (MRA), CT angiography (CTA), MR venography (MRV), and CT venography (CTV) and specific MR sequences (e.g., fat suppression, fluid attenuation inversion recovery (FLAIR), gradient recall echo imaging (GRE), diffusion weighted imaging (DWI), perfusion weighted imaging (PWI), and dynamic perfusion CT (PCT)). They have also included tables that outline the indications, best imaging recommendations for specific ophthalmic entities, and examples of specific radiographic pathology that illustrate the relevant entities.




Digital Image Processing for Ophthalmology


Book Description

Fundus images of the retina are color images of the eye taken by specially designed digital cameras. Ophthalmologists rely on fundus images to diagnose various diseases that affect the eye, such as diabetic retinopathy and retinopathy of prematurity. A crucial preliminary step in the analysis of retinal images is the identification and localization of important anatomical structures, such as the optic nerve head (ONH), the macula, and the major vascular arcades. Identification of the ONH is an important initial step in the detection and analysis of the anatomical structures and pathological features in the retina. Different types of retinal pathology may be detected and analyzed via the application of appropriately designed techniques of digital image processing and pattern recognition. Computer-aided analysis of retinal images has the potential to facilitate quantitative and objective analysis of retinal lesions and abnormalities. Accurate identification and localization of retinal features and lesions could contribute to improved diagnosis, treatment, and management of retinopathy. This book presents an introduction to diagnostic imaging of the retina and an overview of image processing techniques for ophthalmology. In particular, digital image processing algorithms and pattern analysis techniques for the detection of the ONH are described. In fundus images, the ONH usually appears as a bright region, white or yellow in color, and is indicated as the convergent area of the network of blood vessels. Use of the geometrical and intensity characteristics of the ONH, as well as the property that the ONH represents the location of entrance of the blood vessels and the optic nerve into the retina, is demonstrated in developing the methods. The image processing techniques described in the book include morphological filters for preprocessing fundus images, filters for edge detection, the Hough transform for the detection of lines and circles, Gabor filters to detect the blood vessels, and phase portrait analysis for the detection of convergent or node-like patterns. Illustrations of application of the methods to fundus images from two publicly available databases are presented, in terms of locating the center and the boundary of the ONH. Methods for quantitative evaluation of the results of detection of the ONH using measures of overlap and free-response receiver operating characteristics are also described. Table of Contents: Introduction / Computer-aided Analysis of Images of the Retina / Detection of Geometrical Patterns / Datasets and Experimental Setup / Detection of the\\Optic Nerve Head\\Using the Hough Transform / Detection of the\\Optic Nerve Head\\Using Phase Portraits / Concluding Remarks