Development Of Procedures For In Vivo Dosimetry In Radiotherapy
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Development Of Procedures For In Vivo Dosimetry In Radiotherapy
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Author : International Atomic Energy Agency
language : en
Publisher:
Release Date : 2013
Development Of Procedures For In Vivo Dosimetry In Radiotherapy written by International Atomic Energy Agency and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Science categories.
Provides a comprehensive overview of the development of procedures for in vivo dosimetry in radiotherapy. It elaborates on the technology behind in vivo dosimetry and describes an initial set of measurements.
Quality Assurance In Radiotherapy
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Author : Ans Swinnen
language : en
Publisher:
Release Date : 2005
Quality Assurance In Radiotherapy written by Ans Swinnen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Radiation dosimetry categories.
In Vivo Dosimetry In Radiotherapy
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Author : Marion Essers
language : en
Publisher:
Release Date : 1996
In Vivo Dosimetry In Radiotherapy written by Marion Essers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
The Development Of An In Vivo Dosimeter For The Application In Radiotherapy
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Author : Rajiv Bose
language : en
Publisher:
Release Date : 2012
The Development Of An In Vivo Dosimeter For The Application In Radiotherapy written by Rajiv Bose 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.
The expectation for continual improvements in the treatment of cancer has brought quality assurance in radiotherapy under scrutiny in recent years. After a cancer diagnosis a custom treatment plan is devised to meet the particular needs of the patient's condition based on their prognosis. A cancer treatment plan will typically comprise of several cancer treatment technologies combining to form a comprehensive programme to fight the malignant growth. Inherent in each cancer treatment technology is a percentage error in treatment accuracy. Quality assurance is the medical practice to minimise the percentage error in treatment accuracy. Radiotherapy is one of the several cancer treatment technologies a patient might receive as part of their treatment plan, and in-vivo dosimetry is a quality assurance technology specifically designed to minimise the percentage error in the treatment accuracy of radiotherapy. This thesis outlines the work completed in the design of a next generation dosimeter for in-vivo dosimetry. The proposed dosimeter is intended to modernise the process of measuring the absorbed dose of ionising radiation received by the target volume during a radiotherapy session. To accomplish this goal the new dosimeter will amalgamate specialist technologies from the field of particle physics and reapply them to the field of medical physics. This thesis describes the design of a new implantable in-vivo dosimeter, a dosimeter comprising of several individual stages of electronics working together to modernise quality assurance in radiotherapy. Presented within this thesis are the results demonstrating the performance of two critical stages for this new dosimeter, including: the oating gate metal oxide field effective transistor, a radiation sensitive electronic component measuring an absorbed dose of radiation; and the micro antenna, a highly specialist wireless communications device working to transmit a high frequency radio signal. This was a collaborative project between Rutherford Appleton Laboratory and Brunel University. The presented work in this thesis was completed between March 2007 and January 2011.
In Vivo Dosimetry In Radiotherapy And Radiology
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Author : Abdelmoneim Sulieman
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2011-07
In Vivo Dosimetry In Radiotherapy And Radiology written by Abdelmoneim Sulieman and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-07 with Radiation dosimetry categories.
Radiation dosimetry was originally developed as a tool to quantify biological effects for use in setting dose limits for radiation protection and to determine accurately the irradiation needed to treat tumors or to prevent from deterministic effects and radiation risks. In this book Thermoluminescence Dosimeters (TLD) used in diagnostic, interventional radiology and radiotherapy were studied in terms of dose measurement, optimisation and radiation risk reduction for patients and staff.This book is intended to describe the measurement radiation dose for both patients and staff during diagnostic and radiation therapy using TLDs. It also describes methods of radiation dose optimization during diagnostic and interventional radiology by measuring the entrance and pripheral doses to thyroid and skin for patients during breast, head and neck and prostate treatments. The use of build up caps constructed from materials with different atomic number enable us to measure high radiation energies with acceptable accuracy. The radiation risk for both patients and staff was also evaluated. Therefore, this book provide new data and ideas for clinical medical physicists and dosimetrists.
Evaluation Of An In Vivo Dosimetry System For External Beam Radiotherapy And Optimizing The Workflow
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Author : Bianca Weber
language : en
Publisher:
Release Date : 2013
Evaluation Of An In Vivo Dosimetry System For External Beam Radiotherapy And Optimizing The Workflow written by Bianca Weber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
In vivo Dosimetrie wird im Bereich der Qualitätssicherung empfohlen, da es weithin als die ultimative Überprüfung der Bestrahlungskette angesehen wird. Es können große Abweichungen und Probleme mit dem Planungssystem erkannt werden. Es ist eine unabhängige Kontrolle, welche eine zusätzliche Schutzmaßnahme bietet. Jedoch muss das Dosimetriesystem sorgfältig geplant und den Anforderungen der Klinik angepasst werden. Das Dosimetriesystem der Radioonkologie des Stadtspital Triemli verfügt über Photonendosimetrie mit flachen Dioden und Standard Korrekturfaktoren. Die Ausrüstung wurde um Dioden zur Messung von Elektronenfeldern und Streustrahlung erweitert. Ein Teil dieser Arbeit ist die Evaluation der zylindrischen Streudosis-Dioden und eine Einführung in die Elektronen in vivo Dosimetrie. Der Hauptteil der Arbeit ist jedoch die Bestimmung der Korrekturfaktoren für alle verfügbaren Diodenarten und deren Überprüfung mit Phantom- und Patientendaten.Die relevanten Korrekturen bewegen sich im Bereich von 0 bis 30 %. Die wichtigsten Faktoren ergeben sich aus den Messungen der Feldgrößen und des Fokus-Haut-Abstands. Weitere Korrekturen müssen für den Einfallswinkel des Strahls, den Keil und die Position der Diode getroffen werden. Eine genaue Positionierung der Diode ist aufgrund des Dosisprofils empfehlenswert. Die Streudioden (RO-Dioden) können in gleicher Weise als flachen Dioden korrigiert werden, da die Korrekturfaktoren in einem Großteil der Testmessungen mit künstlichem Phantom bestätigt werden konnten. Die Elektronenmessungen zeigen sich als nahezu konstant bei demselben Tubus und sind nahezu unabhängig vom Elektroneneinsatz. Die Schwankungen zwischen den verschiedenen Einsätzen liegen unter 1 %. Somit wird lediglich ein Korrekturfaktor für die unterschiedlichen Tuben nötig. Empfehlenswert ist eine Positionierung der Diode ähnlich den Referenzbedingungen. Dadurch werden die Anzahl der Korrekturfaktoren und die Wahrscheinlichkeit einen Fehlers reduziert. Die Korrekturfaktoren können für 3DRT, Gating und IMRT verwendet werden. Es konnte im Zuge dieser Arbeit keine Lösung für in vivo Dosimetry von volumen-intensitätsmodulierte Arc-Therapie (VMAT) gefunden werden. Die aktuellen Korrekturfaktoren wurden in die neue Software VivoDos implementiert. *****In radiotherapy in vivo dosimetry is widely recommended as the ultimate check of quality assurance. Detecting major errors, identifying planning system problems in vivo dosimetry is an independent check, providing defence in depth. However, the system procedures need to be carefully designed. At the Triemli hospital at the department of radio oncology the dosimetry system has some limitations as just flat diodes, photon dosimetry and standard correction factors are available. The project address the investigation of the influence of field parameters on the diode measurement such as field size, source surface distance, the incident angle of the radiation beam, temperature, wedges and the position of the diode due to the dose profile of the treatment field. Furthermore, cylindrical organ-at-risk and electron diodes are evaluated in order to use them clinically. The next step is the evaluation of the determined factors with artificial phantoms and patient data. The main correction values are varying between 0 and ± 30 %. The most important factors which arise out of the measurements of the field size and the source surface distance. Further corrections have to be done for the incident angle of the beam, the wedge and the position of the diode. Its advisable to position the diode correctly in order to maintain correct measurements. The cylindrical diodes (RO-diodes) can be corrected the same way as flat diodes due to the verification of the correction factors measured with phantoms. Independent of the used inserts the electron measurements are constant at the same applications. The fluctuations between the different inserts are lower than 1 %. Hence only correction for the tube is needed. It is recommended to position the diodes close to reference conditions in order to reduce the number of correction factors and the possibility of errors. The correction factors are valid for 3DRT, Gating and IMRT. Within the time of the development of this work no correction procedure for volumetric intensity-modulated arc therapy (VMAT) was found. The new correction factors are implemented in the new software VivoDos.
Development Of Electron Paramagnetic Resonance Dosimetry Procedures For Radiotherapy
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Author : Sebastian Höfel-Pessies
language : en
Publisher:
Release Date : 2024
Development Of Electron Paramagnetic Resonance Dosimetry Procedures For Radiotherapy written by Sebastian Höfel-Pessies and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024 with categories.
Practical Radiation Oncology Physics E Book
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Author : Sonja Dieterich
language : en
Publisher: Elsevier Health Sciences
Release Date : 2015-06-24
Practical Radiation Oncology Physics E Book written by Sonja Dieterich and has been published by Elsevier Health Sciences this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-24 with Medical categories.
Perfect for radiation oncologists, medical physicists, and residents in both fields, Practical Radiation Oncology Physics provides a concise and practical summary of the current practice standards in therapeutic medical physics. A companion to the fourth edition of Clinical Radiation Oncology, by Drs. Leonard Gunderson and Joel Tepper, this indispensable guide helps you ensure a current, state-of-the art clinical practice. Covers key topics such as relative and in-vivo dosimetry, imaging and clinical imaging, stereotactic body radiation therapy, and brachytherapy. Describes technical aspects and patient-related aspects of current clinical practice. Offers key practice guideline recommendations from professional societies throughout — including AAPM, ASTRO, ABS, ACR, IAEA, and others. Includes therapeutic applications of x-rays, gamma rays, electron and charged particle beams, neutrons, and radiation from sealed radionuclide sources, plus the equipment associated with their production, use, measurement, and evaluation. Features a "For the Physician" box in each chapter, which summarizes the key points with the most impact on the quality and safety of patient care. Provides a user-friendly appendix with annotated compilations of all relevant recommendation documents. Medicine eBook is accessible on a variety of devices.
Clinical 3d Dosimetry In Modern Radiation Therapy
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Author : Ben Mijnheer
language : en
Publisher: CRC Press
Release Date : 2017-10-31
Clinical 3d Dosimetry In Modern Radiation Therapy written by Ben Mijnheer and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-31 with Science categories.
This book provides a first comprehensive summary of the basic principles, instrumentation, methods, and clinical applications of three-dimensional dosimetry in modern radiation therapy treatment. The presentation reflects the major growth in the field as a result of the widespread use of more sophisticated radiotherapy approaches such as intensity-modulated radiation therapy and proton therapy, which require new 3D dosimetric techniques to determine very accurately the dose distribution. It is intended as an essential guide for those involved in the design and implementation of new treatment technology and its application in advanced radiation therapy, and will enable these readers to select the most suitable equipment and methods for their application. Chapters include numerical data, examples, and case studies.
Scintillation Dosimetry
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Author : Sam Beddar
language : en
Publisher: CRC Press
Release Date : 2018-09-03
Scintillation Dosimetry written by Sam Beddar and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-03 with Medical categories.
Scintillation Dosimetry delivers a comprehensive introduction to plastic scintillation dosimetry, covering everything from basic radiation dosimetry concepts to plastic scintillating fiber optics. Comprised of chapters authored by leading experts in the medical physics community, the book: Discusses a broad range of technical implementations, from point source dosimetry scaling to 3D-volumetric and 4D-scintillation dosimetry Addresses a wide scope of clinical applications, from machine quality assurance to small-field and in vivo dosimetry Examines related optical techniques, such as optically stimulated luminescence (OSL) or Čerenkov luminescence Thus, Scintillation Dosimetry provides an authoritative reference for detailed, state-of-the-art information on plastic scintillation dosimetry and its use in the field of radiation dosimetry.