A Magnetic Laser Scanner For Endoscopic Microsurgery

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A Magnetic Laser Scanner For Endoscopic Microsurgery

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Author : Alperen Acemoglu
language : en
Publisher: Springer
Release Date : 2019-07-31

A Magnetic Laser Scanner For Endoscopic Microsurgery written by Alperen Acemoglu and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-07-31 with Technology & Engineering categories.

This book focuses on the design, development, and characterization of a compact magnetic laser scanner for microsurgical applications. In addition, it proposes a laser incision depth controller to be used in soft tissue microsurgeries. The use of laser scanners in soft tissue microsurgery results in high quality ablations with minimal thermal damage to surrounding tissue. However, current scanner technologies for microsurgery are limited to free-beam lasers, which require direct line-of-sight to the surgical site, from outside the patient. Developing compact laser micromanipulation systems is crucial to introducing laser-scanning capabilities in hard-to-reach surgical sites, e.g., vocal cords. In this book, the design and fabrication of a magnetically actuated endoscopic laser scanner have been shown, one that introduces high-speed laser scanning for high quality, non-contact tissue ablations in narrow workspaces. Static and dynamic characterization of the system, its teleoperation through a tablet device, and its control modelling for automated trajectory executions have been shown using a fabricated and assembled prototype. Following this, the book discusses how the laser position and velocity control capabilities of the scanner can be used to design a laser incision depth controller to assist surgeons during operations.

Development Of Femtosecond Laser Endoscopic Microsurgery

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Author : Christopher Luk Hoy
language : en
Publisher:
Release Date : 2012

Development Of Femtosecond Laser Endoscopic Microsurgery written by Christopher Luk Hoy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

Femtosecond laser microsurgery has emerged as a remarkable technique for precise ablation of biological systems with minimal damage to their surrounding tissues. The combination of this technique with nonlinear optical imaging provides a means of microscopic visualization to guide such surgery in situ. A clinical endoscope capable of image-guided femtosecond laser microsurgery will provide physicians a means for cellular-level microsurgery with the highest precision. This dissertation focuses the development of a miniaturized fiber-coupled probe for image-guided microsurgery, towards future realization as a clinical endoscope. The first part of the dissertation describes the development of an 18-mm diameter probe. This development includes delivery of femtosecond laser pulses with pulse energy in excess of 1 μJ through air-core photonic bandgap fiber, laser beam scanning by a microelectromechanical system scanning mirror, and development of a new image reconstruction methodology for extracting increased temporal information during Lissajous beam scanning. During testing, the 18-mm probe compares favorably with the state-of-the-art as a microscopic imaging tool and we present the first known demonstration of cellular femtosecond laser microsurgery through an optical fiber. The second part of the dissertation explores further refinement of the design into a streamlined package with 9.6 mm diameter and improved imaging resolution. Study of the optical performance through analytical and computer-aided optical design indicates that simple custom lenses can be designed that require only commercial-grade manufacturing tolerances while still producing a fully aberration-corrected microsurgical endoscope. With the 9.6-mm probe, we demonstrate nonlinear optical imaging, including tissue imaging of intrinsic signals from collagen, using average laser powers 2-3x lower than the current state-of-the-art. We also demonstrate the use of the 9.6-mm probe in conjunction with gold nanoparticles for enhanced imaging and microsurgery through plasmonics. Finally, in the third part of this dissertation, we detail bench-top development of a new clinical application for combined femtosecond laser microsurgery and nonlinear optical imaging: the treatment of scarred vocal folds. We show the utility of femtosecond laser microsurgery for creating sub-epithelial voids in vocal fold tissue that can be useful for enhancing localization of injectable biomaterial treatments. We demonstrate that a single compact fiber laser system can be utilized for both microsurgery and imaging. Furthermore, the proposed clinical technique is shown to be achievable with parameters (e.g., pulse energy, focused spot size) that were found to be attainable with fiber-coupled probes while still achieving ablation speeds practical for clinical use.

Endoscopy And Microsurgery

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Author : Manfred Frey
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Endoscopy And Microsurgery written by Manfred Frey and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.

In this first volume of the series Update in Plastic Surgery, internationally acknowledged experts give an up-to-date view of the clinical possibilities in plastic surgery which result from video-assisted microsurgery with the endoscope. Advantages and disadvantages are discussed, and reasons are presented why it can be assumed that this technique will be the standard in plastic surgery within a few years.

Biomedical Index To Phs Supported Research

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Author :
language : en
Publisher:
Release Date : 1987

Biomedical Index To Phs Supported Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Medicine categories.

Biomedical Index To Phs Supported Research Pt A Subject Access A H

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Author :
language : en
Publisher:
Release Date : 1994

Biomedical Index To Phs Supported Research Pt A Subject Access A H written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Medicine categories.

Ultrafast Laser Microsurgery

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Author : Kaushik Gurunthan Subramanian
language : en
Publisher:
Release Date : 2018

Ultrafast Laser Microsurgery written by Kaushik Gurunthan Subramanian and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.

Ultrafast lasers are uniquely suited for tissue ablation in situations where precision and preservation of the surrounding tissue architecture is crucial. However, their clinical adoption has been limited by challenges to flexible endoscopic delivery, and the slow cutting speeds and material removal rates these lasers have historically produced. Solving the challenges surrounding miniaturization, fiber-optic delivery and the limited cutting speeds can provide surgeons with a viable tool for precise tissue excision in biologically sensitive regions like the vocal fold and spine. This dissertation focuses on the addressing the engineering challenges surrounding ultrafast laser surgery. The first part of the dissertation describes the design and realization of a 5 mm ultrafast laser scalpel capable of reaching material removal rates in the order of 0.6 mm3/min/W, a first for a miniaturized ultrafast laser device. Micro-Joules energy delivery at the tissue is made possible by air-core Kagome optical fibers. Diffraction limited performance is achieved via objectives with Zinc Sulfide (ZnS), and Calcium Fluoride (CaF2) lenses respectively. The probe’s performance is tested via metal and tissue ablation studies, characterizing high-speed ablation parameters and uniformity of ablation over the scan area. The onset of three-photon absorption in our ZnS lenses limits the energy deliverable for these systems. Through additional z-scan studies, we characterize the nonlinear behavior of ZnS crystals at 776 nm and 1552 nm wavelengths, with an eye towards future endoscopic imaging systems. As a second part of the dissertation, we explore how the near field plasmonic enhancement around gold nanoparticles can be exploited to improve ultrafast laser surgery rates, especially on a cellular level. We detail bench-top pump-probe studies exploring the threshold reduction brought about in ultrafast laser bubble formation in nanoparticle suspensions. The nanoparticle’s spatial position within the focal volume is extracted from the size and frequency of bubbles generated. This information is then used to establish a relationship between the fluence experienced and size of the photo-disruptive bubble formed. With experimental results indicating nearly 20-fold reduction in threshold fluences, the use of such systems can potentially reduce treatment times as large volumes of tissue can be rapidly irradiated at a given time

Cumulated Index Medicus

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Author :
language : en
Publisher:
Release Date : 2000

Cumulated Index Medicus written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Medicine categories.

Intraoperative Imaging

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Author : M. Necmettin Pamir
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-10-20

Intraoperative Imaging written by M. Necmettin Pamir and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-10-20 with Medical categories.

Intraoperative imaging technologies have taken an ever-increasing role in the daily practice of neurosurgeons and the increasing attention and interest necessitated international interaction and collaboration. The Intraoperative Imaging Society was formed in 2007. This book brings together highlights from the second meeting of the Intraoperative Imaging Society, which took place in Istanbul-Turkey from June 14 to 17, 2009. Included within the contents of the book is an overview of the emergence and development of the intraoperative imaging technology as well as a glimpse on where the technology is heading. This is followed by in detail coverage of intraoperative MRI technology and sections on intraoperative CT and ultrasonography. There are also sections on multimodality integration, intraoperative robotics and other intraoperative technologies. We believe that this book will provide an up-to date and comprehensive general overview of the current intraoperative imaging technology as well as detailed discussions on individual techniques and clinical results.

Computer Integrated Surgery

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Author : Russell H. Taylor
language : en
Publisher: MIT Press
Release Date : 1996

Computer Integrated Surgery written by Russell H. Taylor and has been published by MIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Computer systems categories.

In Computer-Integrated Surgery leading researchers and clinical practitioners describe the exciting new partnership that is being forged between surgeons and machines such as computers and robots, enabling them to perform certain skilled tasks better than either can do alone.The 19 chapters in part I, Technology, explore the components -- registration, basic tools for surgical planning, human-machine interfaces, robotic manipulators, safety -- that are the basis of computer-integrated surgery. These chapters provide essential background material needed to get up to speed on current work as well as a ready reference for those who are already active in the field.The 39 chapters in part II, Applications, cover eight clinical areas -- neurosurgery, orthopedics, eye surgery, dentistry, minimal access surgery, ENT surgery, craniofacial surgery, and radiotherapy -- with a concluding chapter on the high-tech operating room. Each section contains a brief introduction as well as at least one "requirements and opportunities" chapter written by a leading clinician in the area under discussion.

Endoscopic Sinus Surgery

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Author : Peter-John Wormald
language : en
Publisher: Thieme
Release Date : 2011-01-01

Endoscopic Sinus Surgery written by Peter-John Wormald and has been published by Thieme this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01-01 with Medical categories.

Winner of the prestigious First Prize in ENT in 2005 from the British Medical Association (first edition)The second edition of this operative manual provides expanded coverage of the complex anatomy and the current surgical approaches to the paranasal sinuses and skull base. It provides practical, step-by-step instruction on using CT scans to reconstruct three-dimensional images of surgical anatomy, enabling the surgeon to develop detailed surgical plans for each clinical situation. The accompanying DVD is greatly expanded from the first edition's CD-ROM, with 30 additional operative videos plus new problem-based exercises. The operative videos enable practitioners to visualize the surgical concepts described and illustrated in the text. Case exercises provide the opportunity to apply knowledge learned to perform three-dimensional reconstructions--a valuable tool for self-assessment.Highlights of the second edition: Extensive presentation of all the anatomical variations and surgical approaches to the sinuses, parasinus regions, and posterior, middle, and anterior cranial fosse Straightforward outlines for approaching the frontal sinus and frontal recess, maxillary sinus trephination, dacryocystorhinostomy surgery, cerebrospinal fluid leak closure, orbital and optic nerve decompression, and Vidian neurectomy 830 diagrams, illustrations, and images demonstrating anatomy and surgical techniques Detailed coverage of endoscopic surgical approaches to tumors of the sinuses and in the intracranial cavity Discussion of the value and importance of axial CT for determining drainage pathways Essential for ENT surgeons, otolaryngologists, and residents, the book equips readers with all the information necessary for handling the range of anatomical variations that may be encountered and selecting the best approach for each.