- BIR Publications
... ABSTRACT. Margins are used in radiotherapy to assist in the calculation of planning target volumes. These margins can be determined by analysing the geometric uncertainties inherent to the radiotherapy planning and delivery process. An important part of this process is the study of electronic portal ...
... ABSTRACT. Margins are used in radiotherapy to assist in the calculation of planning target volumes. These margins can be determined by analysing the geometric uncertainties inherent to the radiotherapy planning and delivery process. An important part of this process is the study of electronic portal ...
Appraisal of Radiation Dose Received in Abdominal Computed
... each patient the following data were recorded patient demographic data, exposure factors, and scan parameters were recorded. For each patient, the following data were recorded (age, gender, weight and height) as well as the following scan parameters (kVp, mAs, slice thickness, number of slices, rota ...
... each patient the following data were recorded patient demographic data, exposure factors, and scan parameters were recorded. For each patient, the following data were recorded (age, gender, weight and height) as well as the following scan parameters (kVp, mAs, slice thickness, number of slices, rota ...
How to Create a World Class Dose Reduction Program
... exams? The facility will need to address these types of questions to ensure that the gains achieved through enhancing hardware, software, protocols, positioning, etc are not undone by poor prescribing behavior. Communicating the existence, purpose and results of the program to patients and the surro ...
... exams? The facility will need to address these types of questions to ensure that the gains achieved through enhancing hardware, software, protocols, positioning, etc are not undone by poor prescribing behavior. Communicating the existence, purpose and results of the program to patients and the surro ...
RADIATION PROTECTION IN DIAGNOSTIC RADIOLOGY
... • Computed Tomography (CT) was introduced into clinical practice in 1972 and revolutionized X Ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are not superimposed on the image as they are in conventional projections • The CT provides imp ...
... • Computed Tomography (CT) was introduced into clinical practice in 1972 and revolutionized X Ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are not superimposed on the image as they are in conventional projections • The CT provides imp ...
Draft Radiation Guideline 6 - Computed Tomography
... diagnosis and in research. Diagnostic medical procedures inevitably deliver a radiation dose to the patient. In most cases, the benefits of diagnostic radiology far outweigh any potential risks to the patient from radiation. However, the level of risk is justified only when patients receive a commen ...
... diagnosis and in research. Diagnostic medical procedures inevitably deliver a radiation dose to the patient. In most cases, the benefits of diagnostic radiology far outweigh any potential risks to the patient from radiation. However, the level of risk is justified only when patients receive a commen ...
Guidelines for Education and Training of Medical Physicists
... In this document we refer to Medical Physicists working (or training for a career) in the radiotherapy speciality as ‘medical physicists in radiotherapy’. Given the wide variety of professional titles in use throughout Europe, we will use the title RTT (Radiation Therapy Technologists) to refer to t ...
... In this document we refer to Medical Physicists working (or training for a career) in the radiotherapy speciality as ‘medical physicists in radiotherapy’. Given the wide variety of professional titles in use throughout Europe, we will use the title RTT (Radiation Therapy Technologists) to refer to t ...
Introducing Radiology Select: Radiation Dose and Dose Reduction
... Thrall (19) proposes that the most promising approach to this complex issue lies in neither biology nor epidemiology but rather in technology, utilization management, and best quality practices. If there is one point on which all authors in the third section agree, it is that the potential benefits ...
... Thrall (19) proposes that the most promising approach to this complex issue lies in neither biology nor epidemiology but rather in technology, utilization management, and best quality practices. If there is one point on which all authors in the third section agree, it is that the potential benefits ...
13 Definition of Target Volume and Organs at Risk. Biological Target
... A major problem when delineating residual tumour tissue in surgically treated patients is the recognition and differentiation of changes caused by surgery itself. But also contrast enhancement, oedema and hyper- or hypodensity (intensity) of the tissue can cause difficulties, ultimately resulting in ...
... A major problem when delineating residual tumour tissue in surgically treated patients is the recognition and differentiation of changes caused by surgery itself. But also contrast enhancement, oedema and hyper- or hypodensity (intensity) of the tissue can cause difficulties, ultimately resulting in ...
Quality assurance for image-guided radiation therapy
... MV-CBCT depends on the clinical application but typically ranges from 3 to 10 cGy,20,61 with the lower end used when daily acquisitions are performed on a patient, while 6 to 10 cGy are used for tumor monitoring studies or for treatment planning purposes. The imaging dose can be straightforwardly ac ...
... MV-CBCT depends on the clinical application but typically ranges from 3 to 10 cGy,20,61 with the lower end used when daily acquisitions are performed on a patient, while 6 to 10 cGy are used for tumor monitoring studies or for treatment planning purposes. The imaging dose can be straightforwardly ac ...
Radiation-Dose-Monitor 11062015.ai
... through the internet, etc.) are used in more than 2500 hospitals and private clinics around the world. We are a key partner of the world's leading radiology equipment manufacturers. These manufacturers offer our peripheral devices and software to their customers bundled with the sale of their DICOM ...
... through the internet, etc.) are used in more than 2500 hospitals and private clinics around the world. We are a key partner of the world's leading radiology equipment manufacturers. These manufacturers offer our peripheral devices and software to their customers bundled with the sale of their DICOM ...
Ultra-Fast Digital Tomosynthesis Reconstruction Using General
... prior to treatment, including anatomic information for setup (20-24), and CT numbers for dose calculation (25-29) and on-line/off-line re-optimization of plans (5-16). All in all, there is minimal doubt that CBCT has prominent role in current and future radiotherapy practices. In certain clinical se ...
... prior to treatment, including anatomic information for setup (20-24), and CT numbers for dose calculation (25-29) and on-line/off-line re-optimization of plans (5-16). All in all, there is minimal doubt that CBCT has prominent role in current and future radiotherapy practices. In certain clinical se ...
Document
... parameters were obtained for three groups of randomly selected patients undergoing abdominal CT examinations of 1320 patients of age 20-80 years. The measured values were obtained on image data and the standard reference values of various machines were obtained from service manual as part of QC/QA a ...
... parameters were obtained for three groups of randomly selected patients undergoing abdominal CT examinations of 1320 patients of age 20-80 years. The measured values were obtained on image data and the standard reference values of various machines were obtained from service manual as part of QC/QA a ...
Web-based system for Quality Assurance of Radiation Oncology
... I would like to start by thanking my supervisor Dr. François DeBlois for his invaluable support throughout my thesis. His guidance and encouragement at all stages of this project made it a wonderful experience. I would like to acknowledge Dr. Gabriela Stroian for the many hours spent carefully discu ...
... I would like to start by thanking my supervisor Dr. François DeBlois for his invaluable support throughout my thesis. His guidance and encouragement at all stages of this project made it a wonderful experience. I would like to acknowledge Dr. Gabriela Stroian for the many hours spent carefully discu ...
Evaluation of Linear Accelerator Gating with Real
... anatomy compresses and distends. Often the external anatomy exhibits a good correlation with the motion of the internal structures such as the diaphragm and/or lung tumors (5, 10). The external anatomy moves from respiration; however, studies have shown considerable differences between the external ...
... anatomy compresses and distends. Often the external anatomy exhibits a good correlation with the motion of the internal structures such as the diaphragm and/or lung tumors (5, 10). The external anatomy moves from respiration; however, studies have shown considerable differences between the external ...
Imaging in Radiotherapy, IAEA Consultant`s meeting report
... imaging (target definition and targeting) have resulted in a far more complex radiation therapy process which promises higher quality of intervention, dose escalation, and/or reduced toxicity. The radiation therapy process contains many steps with imaging distributed throughout the process. Imaging ...
... imaging (target definition and targeting) have resulted in a far more complex radiation therapy process which promises higher quality of intervention, dose escalation, and/or reduced toxicity. The radiation therapy process contains many steps with imaging distributed throughout the process. Imaging ...
Imaging in radiotherapy - Nuclear Sciences and Applications
... imaging (target definition and targeting) have resulted in a far more complex radiation therapy process which promises higher quality of intervention, dose escalation, and/or reduced toxicity. The radiation therapy process contains many steps with imaging distributed throughout the process. Imaging ...
... imaging (target definition and targeting) have resulted in a far more complex radiation therapy process which promises higher quality of intervention, dose escalation, and/or reduced toxicity. The radiation therapy process contains many steps with imaging distributed throughout the process. Imaging ...
X-ray Tube and Generator – Basic principles and construction
... - X-ray tube working characteristics - Intensity of X-ray beam, housing and filtration - Classical X-ray generator (block diagram) - Medium frequency X-ray generator (block diagram) - Principle of radiographic contrast formation - X-ray film and film/screen combination - Mammographic contrast and X- ...
... - X-ray tube working characteristics - Intensity of X-ray beam, housing and filtration - Classical X-ray generator (block diagram) - Medium frequency X-ray generator (block diagram) - Principle of radiographic contrast formation - X-ray film and film/screen combination - Mammographic contrast and X- ...
Current concepts on imaging in radiotherapy
... A typical process of these high-precision RT techniques consists of five major phases: (1) simulation, (2) treatment planning, (3) set-up verification, (4) beam delivery and (5) response assessment. In the simulation procedure, the patient is positioned (using optical lasers) and immobilized just as ...
... A typical process of these high-precision RT techniques consists of five major phases: (1) simulation, (2) treatment planning, (3) set-up verification, (4) beam delivery and (5) response assessment. In the simulation procedure, the patient is positioned (using optical lasers) and immobilized just as ...
Study the Quality Assurance of Conventional X
... exposure time at the same indicated time on the X-ray control panel. The accuracy and reproducibility of the timer stations on diagnostic X-ray equipment are important because they directly timer reproducibility affect the mAs and hence the amount of radiation emitted(AAPM-1991). The coefficient of ...
... exposure time at the same indicated time on the X-ray control panel. The accuracy and reproducibility of the timer stations on diagnostic X-ray equipment are important because they directly timer reproducibility affect the mAs and hence the amount of radiation emitted(AAPM-1991). The coefficient of ...
Updated Response Assessment Criteria for High
... active. To address this issue, the proposed new response criteria suggest that within the first 12 weeks of completion of radiotherapy, when pseudoprogression is most prevalent, progression can only be determined if the majority of the new enhancement is outside of the radiation field (for example, ...
... active. To address this issue, the proposed new response criteria suggest that within the first 12 weeks of completion of radiotherapy, when pseudoprogression is most prevalent, progression can only be determined if the majority of the new enhancement is outside of the radiation field (for example, ...
pet center of excellence newsletter Imaging Evaluation of Prostate Cancer with FDG-PET/CT
... antimicrotubule chemotherapy into progressors or nonprogressors (21). Similarly, another group reported that patients with primary prostate tumors with high SUVs had a poorer prognosis in comparison to those with low SUVs (22). Moreover, as FDG uptake in prostate tumors appears to depend on the pres ...
... antimicrotubule chemotherapy into progressors or nonprogressors (21). Similarly, another group reported that patients with primary prostate tumors with high SUVs had a poorer prognosis in comparison to those with low SUVs (22). Moreover, as FDG uptake in prostate tumors appears to depend on the pres ...
Commissioning of linear accelerators: From acceptance to first
... SRS and SBRT: dose calculation algorithm Recommendation of AAPM TG Report No. 101 (Benedict et al Med Phys 37: 2010)…..Algorithms accounting for 3D scatter (e.g. convolution/superposition, Monte Carlo) perform adequately in most situations, including (in many cases) under circumstances where there ...
... SRS and SBRT: dose calculation algorithm Recommendation of AAPM TG Report No. 101 (Benedict et al Med Phys 37: 2010)…..Algorithms accounting for 3D scatter (e.g. convolution/superposition, Monte Carlo) perform adequately in most situations, including (in many cases) under circumstances where there ...
ICRP
... Images of the highest quality are not essential for all diagnostic tasks, but rather the level of quality (e.g., low noise, medium or low dose) is dependent on the diagnostic task. Objective measures such as image noise or contrast-to-noise ratio may not completely capture all of the features releva ...
... Images of the highest quality are not essential for all diagnostic tasks, but rather the level of quality (e.g., low noise, medium or low dose) is dependent on the diagnostic task. Objective measures such as image noise or contrast-to-noise ratio may not completely capture all of the features releva ...
Radiation Protection – Chapter 23, Bushberg
... Tube Voltage and Beam Filtration Filtration of the polychromatic x-ray energy spectrum can significantly reduce exposure by selectively attenuating the low-energy x-rays in the beam As the tube filtration increases, the beam becomes hardened (effective energy increases) and dose to patient decre ...
... Tube Voltage and Beam Filtration Filtration of the polychromatic x-ray energy spectrum can significantly reduce exposure by selectively attenuating the low-energy x-rays in the beam As the tube filtration increases, the beam becomes hardened (effective energy increases) and dose to patient decre ...
Good Afternoon I am Bulent Aydogan and I will be Good Afternoon I
... EBT + chemotherapy; intracavitary brachytherapy; HR CTV is contoured: (a) Standard loading pattern: Coverage of HR CTV is insufficient; dose volume relations in organs at risk are appropriate. (b) Optimised treatment plan - NOT RECOMMENDED: By dragging the isodose line to the left, HR CTV is appropr ...
... EBT + chemotherapy; intracavitary brachytherapy; HR CTV is contoured: (a) Standard loading pattern: Coverage of HR CTV is insufficient; dose volume relations in organs at risk are appropriate. (b) Optimised treatment plan - NOT RECOMMENDED: By dragging the isodose line to the left, HR CTV is appropr ...
Proton therapy
Proton therapy or proton beam therapy is a medical procedure, a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often in the treatment of cancer. Proton therapy's chief advantage over other types of external beam radiotherapy is that as a charged particle the dose is deposited over a narrow range and there is minimal exit dose.