Estimation of Patient Setup Errors in Radiation Therapy Using Portal Imaging
Author : Catharina Sundgren
Publisher :
Page : 45 pages
File Size : 16,11 MB
Release : 2004
Category :
ISBN :
Author : Catharina Sundgren
Publisher :
Page : 45 pages
File Size : 16,11 MB
Release : 2004
Category :
ISBN :
Author : Jeremy David Page Hoisak
Publisher : CRC Press
Page : 515 pages
File Size : 46,88 MB
Release : 2020-02-13
Category : Medical
ISBN : 0429951809
Surface Guided Radiation Therapy provides a comprehensive overview of optical surface image guidance systems for radiation therapy. It serves as an introductory teaching resource for students and trainees, and a valuable reference for medical physicists, physicians, radiation therapists, and administrators who wish to incorporate surface guided radiation therapy (SGRT) into their clinical practice. This is the first book dedicated to the principles and practice of SGRT, featuring: Chapters authored by an internationally represented list of physicists, radiation oncologists and therapists, edited by pioneers and experts in SGRT Covering the evolution of localization systems and their role in quality and safety, current SGRT systems, practical guides to commissioning and quality assurance, clinical applications by anatomic site, and emerging topics including skin mark-less setups. Several dedicated chapters on SGRT for intracranial radiosurgery and breast, covering technical aspects, risk assessment and outcomes. Jeremy Hoisak, PhD, DABR is an Assistant Professor in the Department of Radiation Medicine and Applied Sciences at the University of California, San Diego. Dr. Hoisak’s clinical expertise includes radiosurgery and respiratory motion management. Adam Paxton, PhD, DABR is an Assistant Professor in the Department of Radiation Oncology at the University of Utah. Dr. Paxton’s clinical expertise includes patient safety, motion management, radiosurgery, and proton therapy. Benjamin Waghorn, PhD, DABR is the Director of Clinical Physics at Vision RT. Dr. Waghorn’s research interests include intensity modulated radiation therapy, motion management, and surface image guidance systems. Todd Pawlicki, PhD, DABR, FAAPM, FASTRO, is Professor and Vice-Chair for Medical Physics in the Department of Radiation Medicine and Applied Sciences at the University of California, San Diego. Dr. Pawlicki has published extensively on quality and safety in radiation therapy. He has served on the Board of Directors for the American Society for Radiology Oncology (ASTRO) and the American Association of Physicists in Medicine (AAPM).
Author : X. Allen Li
Publisher : CRC Press
Page : 404 pages
File Size : 29,10 MB
Release : 2011-01-27
Category : Medical
ISBN : 1439816352
Modern medical imaging and radiation therapy technologies are so complex and computer driven that it is difficult for physicians and technologists to know exactly what is happening at the point-of-care. Medical physicists responsible for filling this gap in knowledge must stay abreast of the latest advances at the intersection of medical imaging an
Author : Lu Zheng Meng
Publisher :
Page : 65 pages
File Size : 35,73 MB
Release : 2011
Category : Radiotherapy
ISBN :
Purpose: Stereotactic radiation therapy and stereotactic radiosurgery deliver radiation precisely to tumors, using special equipment to position and demobilize patients. The VisionRT system, with its component AlignRT, is a non-invasive stereotactic positioning and tracking system that uses cameras to capture infra-red images of patients, and process these images, to obtain precise shifts in patient location. This thesis evaluates the accuracy of the AlignRT system accuracy while setting up and tracking patients. Methods: This thesis investigates the setup accuracy of the AlignRT system based on the CT contour of an anthropomorphic phantom exported to the AlignRT from treatment planning systems, and compared results to those provided by the X-ray image-based positioning system ExacTrac. Measurements utilize a modified Winston-Lutz technique to derive the deviation of the planned isocenter relative to the radiation isocenter. A phantom embedded with a 16 mm metallic sphere and a Winston-Luts pointer were used as the positioning objects. A Varian electronic portal imaging device were utilized to obtain images. A Vidar scanner and RIT113v5.2 software were used to process images obtained in Winston-Lutz tests. Based on the equations derived for Winston-Lutz tests, shifts of the planned isocenter relative to the radiation isocenter were calculated, which were then used to judge the positioning the objects. Both positioning and tracking modes of AlignRT were tested. AlignRT, ExacTrac, and Winston-Lutz test measurements were all performed on the same Varian Novalis Tx system. Results: The results indicated that the AlignRT gave a positioning error of more than 1 mm based on CT contours and at small couch angles, which was larger than the clinical tolerance of 1mm for stereotactic radiation therapy. The positioning error would be less if the AlignRT system could be recalibrated with the same isocenter as the X-ray system or utilize its own initial image instead of CT contour. At larger couch angles, the positioning errors were larger than 1 mm even after recalibration. A further investigation and collaboration with the manufacture would be required to obtain desired accuracy.
Author : Robert D. Timmerman
Publisher : Lippincott Williams & Wilkins
Page : 384 pages
File Size : 15,73 MB
Release : 2012-10-09
Category : Medical
ISBN : 1469801876
This book provides detailed, state-of-the-art information and guidelines on the latest developments, innovations, and clinical procedures in image-guided and adaptive radiation therapy. The first section discusses key methodological and technological issues in image-guided and adaptive radiation therapy, including use of implanted fiducial markers, management of respiratory motion, image-guided stereotactic radiosurgery and stereotactic body radiation therapy, three-dimensional conformal brachytherapy, target definition and localization, and PET/CT and biologically conformal radiation therapy. The second section provides practical clinical information on image-guided adaptive radiation therapy for cancers at all common anatomic sites and for pediatric cancers. The third section offers practical guidelines for establishing an effective image-guided adaptive radiation therapy program.
Author : International Atomic Energy Agency
Publisher :
Page : 39 pages
File Size : 20,6 MB
Release : 2019-04-04
Category : Technology & Engineering
ISBN : 9789201032188
This publication provides guidelines, and highlights the milestones to be achieved by radiotherapy departments in the safe and effective introduction of image guided radiotherapy. Recent advances in external beam radiotherapy include the technology to image the patient in the treatment position, in the treatment room at the time of treatment. Since this technology and associated image techniques, termed image guided radiotherapy, are perceived as the cutting-edge of development in the field of radiotherapy, this publication addresses the concerns of personnel in radiotherapy departments as to the preparatory conditions and resources involved in implementation. Information is also presented on the current status of the evidence supporting the use of image guided radiotherapy in terms of patient outcomes.
Author : Louise Hanna
Publisher : Cambridge University Press
Page : 625 pages
File Size : 43,78 MB
Release : 2015-11-19
Category : Medical
ISBN : 1107683629
A complete guide to clinical oncology, covering the main treatment modalities and diagnosis and treatment strategies for specific tumour types.
Author : Hidetaka Arimura
Publisher : Springer
Page : 383 pages
File Size : 35,78 MB
Release : 2017-01-26
Category : Medical
ISBN : 9811029458
This book provides a comprehensive overview of the state-of-the-art computational intelligence research and technologies in computer-assisted radiation therapy based on image engineering. It also traces major technical advancements and research findings in the field of image-based computer-assisted radiation therapy. In high-precision radiation therapies, novel approaches in image engineering including computer graphics, image processing, pattern recognition, and computational anatomy play important roles in improving the accuracy of radiation therapy and assisting decision making by radiation oncology professionals, such as radiation oncologists, radiation technologists, and medical physicists, in each phase of radiation therapy. All the topics presented in this book broaden understanding of the modern medical technologies and systems for image-based computer-assisted radiation therapy. Therefore this volume will greatly benefit not only radiation oncologists and radiologists but also radiation technologists, professors in medical physics or engineering, and engineers involved in the development of products to utilize this advanced therapy.
Author : Luther W. Brady
Publisher : Springer
Page : 0 pages
File Size : 16,78 MB
Release : 2012-09-15
Category : Medical
ISBN : 9783540855132
This comprehensive encyclopedia, comprising a wide range of entries written by leading experts, provides detailed information on radiation oncology, including the most recent developments in the field. It will be of particular value for basic and clinical scientists in academia, practice, and industry and will also be of benefit to those in related fields, students, teachers, and interested laypersons.
Author : Arno J. Mundt
Publisher : PMPH-USA
Page : 672 pages
File Size : 12,53 MB
Release : 2010-12-31
Category : Medical
ISBN : 9781607950424
Image Guided Radiation Therapy (IGRT) is a true revolution in the field of radiation oncology. IGRT provides the unprecedented means of conforming does to the shape of the target tissues in 3-dimensions reducing the risk of complications thereby improving the quality of life of irradiated patients. Moreover, IGRT provides the means to deliver higher than conventional doses thus improving the chance of cure in these patients. Despite its established benefits, several barriers exist to the widespread clinical implementation of IGRT. In the past, great concerns existed regarding the large capital outlay needed for both software and hardware. This barrier is less relevant today given the increased reimbursements possible with IGRT. Today, the most significant barrier is education. IGRT is a fundamentally new approach to both treatment planning and delivery. Adoption of the IGRT approach entails new ways of thinking in regard to patient selection, treatment planning and quality assurance measures. Unfortunately, apart from a few University-based short courses, limited resources are available for the physician and physicist interested in learning IGRT.