CT Anatomy for Radiotherapy

CT Anatomy for Radiotherapy

The focus of the book is on radiotherapy and some images of common tumour pathologies are utilised to illustrate some relevant abnormal anatomy. Short self-test questions help to keep the reader engaged throughout.

Author: Pete Bridge

Publisher: M & K Publishing

ISBN: OCLC:751700876

Category:

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View: 880

Knowledge of CT anatomy is increasingly vital in daily radiotherapy practice, especially with more widespread use of cross-sectional image-guided radiotherapy (IGRT) techniques. Existing CT anatomy texts are predominantly written for the diagnostic practitioner and do not always address the radiotherapy issues while emphasising structures that are not common to radiotherapy practice. "CT Anatomy for Radiotherapy" is a new radiotherapy-specific text that is intended to prepare the reader for CT interpretation for both IGRT and treatment planning. It is suitable for undergraduate students, qualified therapy radiographers, dosimetrists and may be of interest to oncologists and registrars engaged in treatment planning. All essential structures relevant to radiotherapy are described and depicted on 3D images generated from radiotherapy planning systems. System-based labelled CT images taken in relevant imaging planes and patient positions build up understanding of relational anatomy and CT interpretation. Images are accompanied by comprehensive commentary to aid with interpretation. This simplified approach is used to empower the reader to rapidly gain image interpretation skills. The book pays special attention to lymph node identification as well as featuring a unique section on Head and Neck Deep Spaces to help understanding of common pathways of tumour spread. Fully labelled CT images using radiotherapy-specific views and positioning are complemented where relevant by MR and fusion images. A brief introduction to image interpretation using IGRT devices is also covered. The focus of the book is on radiotherapy and some images of common tumour pathologies are utilised to illustrate some relevant abnormal anatomy. Short self-test questions help to keep the reader engaged throughout.
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Delineating Organs at Risk in Radiation Therapy

Delineating Organs at Risk in Radiation Therapy

This book will prove an invaluable guide to the delineation of organs at risk of toxicity in patients undergoing radiotherapy.

Author: Giampiero Ausili Cèfaro

Publisher: Springer Science & Business Media

ISBN: 9788847052574

Category: Medical

Page: 152

View: 267

Defining organs at risk is a crucial task for radiation oncologists when aiming to optimize the benefit of radiation therapy, with delivery of the maximum dose to the tumor volume while sparing healthy tissues. This book will prove an invaluable guide to the delineation of organs at risk of toxicity in patients undergoing radiotherapy. The first and second sections address the anatomy of organs at risk, discuss the pathophysiology of radiation-induced damage, and present dose constraints and methods for target volume delineation. The third section is devoted to the radiological anatomy of organs at risk as seen on typical radiotherapy planning CT scans, with a view to assisting the radiation oncologist to recognize and delineate these organs for each anatomical region – head and neck, mediastinum, abdomen, and pelvis. The book is intended both for young radiation oncologists still in training and for their senior colleagues wishing to reduce intra-institutional variations in practice and thereby to standardize the definition of clinical target volumes. ​
Categories: Medical

MRI for Radiotherapy

MRI for Radiotherapy

This book provides, for the first time, a unified approach to the application of MRI in radiotherapy that incorporates both a physics and a clinical perspective.

Author: Gary Liney

Publisher: Springer

ISBN: 9783030144425

Category: Medical

Page: 210

View: 812

This book provides, for the first time, a unified approach to the application of MRI in radiotherapy that incorporates both a physics and a clinical perspective. Readers will find detailed information and guidance on the role of MRI in all aspects of treatment, from dose planning, with or without CT, through to response assessment. Extensive coverage is devoted to the latest technological developments and emerging options. These include hybrid MRI treatment systems, such as MRI-Linac and proton-guided systems, which are ushering in an era of real-time MRI guidance. The past decade has witnessed an unprecedented rise in the use of MRI in the radiation treatment of cancer. The development of highly conformal dose delivery techniques has led to a growing need to harness advanced imaging for patient treatment. With its flexible soft tissue contrast and ability to acquire functional information, MRI offers advantages at all stages of treatment. In documenting the state of the art in the field, this book will be of value to a wide range of professionals. The authors are international experts drawn from the scientific committee of the 2017 MR in RT symposium and the faculty of the ESTRO teaching course on imaging for physicists.
Categories: Medical

Image Guided and Adaptive Radiation Therapy

Image Guided and Adaptive Radiation Therapy

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.

Author: Robert D. Timmerman

Publisher: Lippincott Williams & Wilkins

ISBN: 9781469801872

Category: Medical

Page: 384

View: 101

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.
Categories: Medical

IMRT IGRT SBRT

IMRT  IGRT  SBRT

As a highlight of this volume, a number of images can be viewed online in time-elapse videos for greater clarity and more dynamic visualizationWritten by leading authorities in the field, this comprehensive volume brings clinical and ...

Author: John Meyer

Publisher: Karger Medical and Scientific Publishers

ISBN: 9783805596800

Category: Medical

Page: 495

View: 895

Over the last 4 years, IMRT, IGRT, SBRT: Advances in the Treatment Planning and Delivery of Radiotherapy has become a standard reference in the field. During this time, however, significant progress in high-precision technologies for the planning and delivery of radiotherapy in cancer treatment has called for a second edition to include these new developments. Thoroughly updated and extended, this new edition offers a comprehensive guide and overview of these new technologies and the many clinical treatment programs that bring them into practical use. Advances in intensity-modulated radiotherapy (IMRT), and 4D and adaptive treatment planning are clearly presented. Target localization and image-guided radiotherapy (IGRT) systems are comprehensively reviewed as well. Clinical tutorials illustrate target definitions for the major cancer sites, and useful techniques for organ motion management are described and compared. There are also several chapters that explore the technical basis and latest clinical experience with stereotactic body radiotherapy (SBRT) and summarize practical treatment recommendations. Furthermore, the significant and increasing contributions of proton therapy to cancer care are also highlighted, alongside the practical allocation of all these new technologies from an economic perspective. As a highlight of this volume, a number of images can be viewed online in time-elapse videos for greater clarity and more dynamic visualizationWritten by leading authorities in the field, this comprehensive volume brings clinical and technical practitioners of radiotherapy fully up to date with the key developments in equipment, technologies and treatment guidelines.
Categories: Medical

Principles and Practice of Radiation Therapy

Principles and Practice of Radiation Therapy

A problem-based approach makes it easy to apply principles to treatment planning and delivery. New to this edition are updates on current equipment, procedures, and treatment planning.

Author: Charles M. Washington

Publisher: Elsevier Health Sciences

ISBN: 9780323287524

Category: Medical

Page: 908

View: 662

Learn everything you need to know about radiation therapy with the only comprehensive text written for radiation therapy students by radiation therapists. This book is designed to help you understand cancer management, improve clinical techniques for delivering doses of radiation, and apply complex concepts to treatment planning and delivery. This edition features enhanced learning tools and thoroughly updated content, including three new chapters to inform you of increasingly important technologies and practices. The up-to-date and authoritative coverage of this text make it a resource you'll want to consult throughout your radiation therapy courses and beyond. Complete coverage of radiation therapy provides all introductory content plus the full scope of information on physics, simulation, and treatment planning. Contributions from a broad range of practitioners bring you the expertise of radiation therapists, physicians, nurses, administrators, and educators who are part of cancer management teams. Chapters on image guided radiation therapy, intensity modulated radiation therapy, and CT simulation keep you up-to-date with emerging technologies. Color inserts show significant procedures and imaging technologies clearly.
Categories: Medical

Image Guided Radiotherapy of Lung Cancer

Image Guided Radiotherapy of Lung Cancer

expiration CT. Abbreviation: CT, computed tomography. adaptive radiotherapy strategies. In this case, the auto-segmentation of anatomy on repeat CT or 4D-CT becomes an important application. With deformable image registration method, ...

Author: James D. Cox

Publisher: CRC Press

ISBN: 9780849387821

Category: Medical

Page: 192

View: 342

Lung cancer is the leading cause of cancer death in the United States, but IGRT (image guided radiation therapy) offers the possibility of more aggressive and enhanced treatments. The only available source on the subject that emphasizes new imaging techniques, and provides step-by-step treatment guidelines for lung cancer, this source helps clinici
Categories: Medical

Four dimensional Radiotherapy Treatment Planning for Lung Cancer

Four dimensional Radiotherapy Treatment Planning for Lung Cancer

Lung cancer is the second most diagnosed and the leading cause of cancer death in the US. It accounts for nearly 15% of all new cancer cases, and about 28% of all cancer deaths.

Author: Ammar Durghalli

Publisher:

ISBN: OCLC:770101900

Category:

Page: 84

View: 224

Lung cancer is the second most diagnosed and the leading cause of cancer death in the US. It accounts for nearly 15% of all new cancer cases, and about 28% of all cancer deaths. Unfortunately, lung cancer radiotherapy is associated with a poor clinical outcome. Thus, the need for an aggressive radiation therapy regimen, that is, involving fewer fractions and higher radiation doses per fraction to tumor targets while increasing healthy tissue sparing, is evident for increasing local control rates and clinical outcome. Stereotactic body radiation therapy (SBRT) is among current state of the art techniques that fill this need by providing highly conformal, high-dose radiation doses to cancerous tumors. Such techniques as SBRT rely on state of the art imaging systems to provide precise localization of tumor targets, as well as critical organs at risk, throughout all stages of the radiotherapy process from treatment simulation and planning, and throughout the radiation delivery. The main source of uncertainty in radiation delivery of lung cancer is due to the respiration-induced deformation of the thoracic anatomy during imaging/treatment. Therefore, the four-dimensional computed tomography (4DCT) imaging is a crucial step in the design of a highly conformal SBRT plan. 4DCT captures the anatomy at multiple stages of the respiratory cycle. However, the current SBRT plans are based on a single aggregate CT set, such as the maximum intensity projection (MIP) or the average intensity projection (AIP) CT images, which is derived from a 4DCT dataset and represents a motion encompassing CT image on which treatment planning is based. However, this imaging method, while saves time, presents a limitation on SBRT since neither MIP nor AIP CT images correctly represent the moving anatomy. The resulting planned dose and actual delivered dose may or may not be substantially different depending on each patient case. Deformable image registration (DIR) is an image processing technique that calculates the relative motion magnitude and direction of each image voxel between a corresponding two images of the same anatomy. The result can, in principle, be used to correctly account for the motion-induced errors in dose calculations, and thus provides means to verify the accuracy of radiation dose delivery, known as 4D planning. The goal of this thesis is to pursue the viability of this verification process. The two well-known DIR algorithms were studied and implemented: (1) Horn-Schunck's optical flow, and (2) Demons algorithms. In this thesis, a representative two lung SBRT plans were re-calculated based on the DIR between all 4DCT image phases, and the resulting "4D doses" were compared to the original planned doses. Results showed that the current MIP-based SBRT planning doses did not significantly differ from the full 4D plan doses. Moreover, it was shown that the optical flow algorithm is faster and more accurate than the Demons algorithm. Further studies are needed to validate our groundbreaking work in the future.
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Radiotherapy

Radiotherapy

Repeated CT scans are commonly used to measure the anatomic change during the treatment course. Ideally, the repeated CT scans should be performed frequently with a 4D CT scan so that patient anatomy and motion can be accurately ...

Author: Cem Onal

Publisher: BoD – Books on Demand

ISBN: 9789535131496

Category: Medical

Page: 292

View: 741

Radiotherapy plays a key role in the treatment of many cancer types. This book is intended to bring forward the recent advancements in the field of radiation oncology. It presents the experience of several researchers who dedicate many hours a day to not only treat patients but also assess the physical aspects of newer radiotherapy facilities. This book contains many valuable contributions from radiation oncology physicians and medical physicists who are experts in their fields.
Categories: Medical