Collimator-Based Tracking with an Add-On Multileaf Collimator PDF Download
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Author: Andreas Böhler
Publisher: Springer
ISBN: 3658106581
Category : Medical
Languages : en
Pages : 61
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Book Description
In this thesis, a tracking system was developed by modifying an add-on collimator, the Siemens Moduleaf, for realtime applications in radiotherapy. As the add-on collimator works almost completely autonomously of the linear accelerator (LinAc), no modifications to the latter were necessary. The adaptations to the Moduleaf were mainly software-based. In order to reduce the complexity of the system, outdated electronic parts were replaced with newer components where practical. Verification was performed by measuring the latency of the system as well as the impact on applied dose to a predefined target volume, moving in the leaf's travel direction. Latency measurements in software were accomplished by comparing the target and current positions of the leaves. For dose measurements, a Gafchromic EBT2 film was placed beneath the target 4D phantom, in between solid water plates, and moved alongside with it. Based on the results, a tracking-capable add-on collimator seems to be a useful tool for reducing the margins for the treatment of small, slow-moving targets. Radiotherapy is one of the most important methods used for the treatment of cancer. Irradiating a moving target is also one of the most challenging tasks to accomplish in modern radiotherapy.
Author: Andreas Böhler
Publisher: Springer
ISBN: 3658106581
Category : Medical
Languages : en
Pages : 61
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Book Description
In this thesis, a tracking system was developed by modifying an add-on collimator, the Siemens Moduleaf, for realtime applications in radiotherapy. As the add-on collimator works almost completely autonomously of the linear accelerator (LinAc), no modifications to the latter were necessary. The adaptations to the Moduleaf were mainly software-based. In order to reduce the complexity of the system, outdated electronic parts were replaced with newer components where practical. Verification was performed by measuring the latency of the system as well as the impact on applied dose to a predefined target volume, moving in the leaf's travel direction. Latency measurements in software were accomplished by comparing the target and current positions of the leaves. For dose measurements, a Gafchromic EBT2 film was placed beneath the target 4D phantom, in between solid water plates, and moved alongside with it. Based on the results, a tracking-capable add-on collimator seems to be a useful tool for reducing the margins for the treatment of small, slow-moving targets. Radiotherapy is one of the most important methods used for the treatment of cancer. Irradiating a moving target is also one of the most challenging tasks to accomplish in modern radiotherapy.
Author: John Meyer
Publisher: Karger Medical and Scientific Publishers
ISBN: 3805581998
Category : Medical
Languages : en
Pages : 445
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Book Description
New high-precision technologies for the planning and delivery of radiotherapy are major advances in cancer treatment. This volume is a comprehensive guidebook to these new technologies and the many clinical treatment programs that bring them into practical use. Advances in intensity modulated radiation therapy (IMRT), 4D and adaptive treatment planning are clearly explained, and the new target localization and image-guided radiotherapy (IGRT) systems are comprehensively reviewed. Clinical tutorials fully illustrate the target definitions for the major cancer sites, and techniques for organ motion management are shown. In addition, chapters explore the technical basis for stereotactic body radiotherapy (SBRT) and the latest clinical experience with it for most organ sites.
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Category : Disabled veterans
Languages : en
Pages : 576
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Book Description
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ISBN:
Category :
Languages : en
Pages : 742
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ISBN:
Category : Cancer
Languages : en
Pages : 456
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Category : Disabled veterans
Languages : en
Pages : 536
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Book Description
Author: Harald Paganetti
Publisher: CRC Press
ISBN: 1439836450
Category : Medical
Languages : en
Pages : 691
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Book Description
Proton Therapy Physics goes beyond current books on proton therapy to provide an in-depth overview of the physics aspects of this radiation therapy modality, eliminating the need to dig through information scattered in the medical physics literature. After tracing the history of proton therapy, the book summarizes the atomic and nuclear physics background necessary for understanding proton interactions with tissue. It describes the physics of proton accelerators, the parameters of clinical proton beams, and the mechanisms to generate a conformal dose distribution in a patient. The text then covers detector systems and measuring techniques for reference dosimetry, outlines basic quality assurance and commissioning guidelines, and gives examples of Monte Carlo simulations in proton therapy. The book moves on to discussions of treatment planning for single- and multiple-field uniform doses, dose calculation concepts and algorithms, and precision and uncertainties for nonmoving and moving targets. It also examines computerized treatment plan optimization, methods for in vivo dose or beam range verification, the safety of patients and operating personnel, and the biological implications of using protons from a physics perspective. The final chapter illustrates the use of risk models for common tissue complications in treatment optimization. Along with exploring quality assurance issues and biological considerations, this practical guide collects the latest clinical studies on the use of protons in treatment planning and radiation monitoring. Suitable for both newcomers in medical physics and more seasoned specialists in radiation oncology, the book helps readers understand the uncertainties and limitations of precisely shaped dose distribution.
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ISBN:
Category : Prosthesis
Languages : en
Pages : 560
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Book Description
Author: Robert Hermans
Publisher: Springer Science & Business Media
ISBN: 3642178685
Category : Medical
Languages : en
Pages : 415
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Book Description
Imaging is crucial in the multidisciplinary approach to head and neck cancer management. The rapid technological development of recent years makes it necessary for all members of the multidisciplinary team to understand the potential applications, limitations, and advantages of existing and evolving imaging technologies. It is equally important that the radiologist has sufficient clinical background knowledge to understand the clinical significance of imaging findings. This book provides an overview of the findings obtained using different imaging techniques during the evaluation of head and neck neoplasms, both before and after therapy. All anatomic areas in the head and neck are covered, and the impact of imaging on patient management is discussed in detail. The authors are recognized experts in the field, and numerous high-quality images are included. This second edition provides information on the latest imaging developments in this area, including the application of PET-CT and diffusion-weighted magnetic resonance imaging.
Author: British Library. Document Supply Centre
Publisher:
ISBN:
Category : Conference proceedings
Languages : en
Pages : 696
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