AAPM Report 197 - Louisiana State University
... of these subjects may have been covered in prior training. However, recent experience indicates that Medical Ethics and Statistics may require more in-depth coverage. During the next several years, the American Association of Physicists in Medicine (AAPM) will be monitoring the needs in these areas. ...
... of these subjects may have been covered in prior training. However, recent experience indicates that Medical Ethics and Statistics may require more in-depth coverage. During the next several years, the American Association of Physicists in Medicine (AAPM) will be monitoring the needs in these areas. ...
Understanding Radiation Units
... purposes, but not directly measurable. • Application specific quantities - Measurable in medical imaging. • Diagnostic Refernce Levels ...
... purposes, but not directly measurable. • Application specific quantities - Measurable in medical imaging. • Diagnostic Refernce Levels ...
Full Text - Diagnostic and Interventional Radiology
... ver the past decade there has been an increase in scrutiny pertaining to radiation dose associated with medical procedures from both professional societies and the lay press. In 2006, a total of 4 million interventional procedures performed in the United States accounted for approximately 14% of the ...
... ver the past decade there has been an increase in scrutiny pertaining to radiation dose associated with medical procedures from both professional societies and the lay press. In 2006, a total of 4 million interventional procedures performed in the United States accounted for approximately 14% of the ...
ESCH1317_Sarabjeet Singh
... and gaps in knowledge between scanning parameters and their effect on image quality. Our proposal will create web based, user-friendly interactive educational modules for protocol based CT radiation dose optimization that will educate the radiology community about the need and ways for clinical indi ...
... and gaps in knowledge between scanning parameters and their effect on image quality. Our proposal will create web based, user-friendly interactive educational modules for protocol based CT radiation dose optimization that will educate the radiology community about the need and ways for clinical indi ...
Full Text - RSNA Publications Online
... Reassessment of radiation risk was made in the late 1980s after a revised determination of the radiation doses and subsequent radiation biologic effects resulting from the atomic bombs in World War II in Japan. Analysis of these revised doses and their associated effects on survivors and their offs ...
... Reassessment of radiation risk was made in the late 1980s after a revised determination of the radiation doses and subsequent radiation biologic effects resulting from the atomic bombs in World War II in Japan. Analysis of these revised doses and their associated effects on survivors and their offs ...
comparison of localization performance with implanted fiducial
... (CBCT)– based setup corrections as compared with orthogonal megavoltage (MV) portal image-based corrections for patients undergoing external-beam radiotherapy of the prostate. Methods and Materials: Daily cone-beam CT volumetric images were acquired after setup for patients with three intraprostatic ...
... (CBCT)– based setup corrections as compared with orthogonal megavoltage (MV) portal image-based corrections for patients undergoing external-beam radiotherapy of the prostate. Methods and Materials: Daily cone-beam CT volumetric images were acquired after setup for patients with three intraprostatic ...
25 Image-Guided/Adaptive Radiotherapy
... a consistent discrepancy between the patient/organ shape and position appearing in pre-treatment simulation/planning and that at treatment delivery; therefore, it is also called treatment preparation error (Van Herk et al. 2000). The random component represents patient/organ shape and position varia ...
... a consistent discrepancy between the patient/organ shape and position appearing in pre-treatment simulation/planning and that at treatment delivery; therefore, it is also called treatment preparation error (Van Herk et al. 2000). The random component represents patient/organ shape and position varia ...
Foreword: Radiology Select Volume 5—Radiation Dose and
... As a consequence of the success of medical imaging over the past decades for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in subs ...
... As a consequence of the success of medical imaging over the past decades for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in subs ...
Dose reduction in maxillofacial imaging using low dose
... [23,24]. High-resolution CT can provide diagnostic information about bone structure and soft tissues as well. Additionally, there are CT dose reduction protocols by using lower mA and increasing pitch. The dose reduction leads to an image noise increase, which results to a lower image quality [6,10] ...
... [23,24]. High-resolution CT can provide diagnostic information about bone structure and soft tissues as well. Additionally, there are CT dose reduction protocols by using lower mA and increasing pitch. The dose reduction leads to an image noise increase, which results to a lower image quality [6,10] ...
MR guidance in radiotherapy
... ratios that can be traded off for higher spatial resolution or imaging speed. In addition, various functional imaging contrasts such as Blood Oxygen Level Dependence (BOLD) are augmented by the higher magnetic field strength (Ogawa et al 1993, Donahue et al 2011). At the moment, 7 T MRI forms the fo ...
... ratios that can be traded off for higher spatial resolution or imaging speed. In addition, various functional imaging contrasts such as Blood Oxygen Level Dependence (BOLD) are augmented by the higher magnetic field strength (Ogawa et al 1993, Donahue et al 2011). At the moment, 7 T MRI forms the fo ...
Inclusion of the dose from kilovoltage cone beam CT in the radiation
... were not in fact measured but rather calculated,1 hence there are large uncertainties 共up to 15%兲 associated with them. It should also be noted that this postprocessing method assumes a constant energy for the beam even though the energy of the kilovoltage beam changes with depth. In addition the ph ...
... were not in fact measured but rather calculated,1 hence there are large uncertainties 共up to 15%兲 associated with them. It should also be noted that this postprocessing method assumes a constant energy for the beam even though the energy of the kilovoltage beam changes with depth. In addition the ph ...
Prediction of respiratory tumour motion for real-time image
... Image guidance in radiotherapy and extracranial radiosurgery offers the potential for precise radiation dose delivery to a moving tumour. Recent work has demonstrated how to locate and track the position of a tumour in real-time using diagnostic x-ray imaging to find implanted radio-opaque markers. ...
... Image guidance in radiotherapy and extracranial radiosurgery offers the potential for precise radiation dose delivery to a moving tumour. Recent work has demonstrated how to locate and track the position of a tumour in real-time using diagnostic x-ray imaging to find implanted radio-opaque markers. ...
Incorporation of functional imaging data in the evaluation of dose
... normal lung. Such organs are constituted from many relatively identical and homogeneously distributed functional sub-units which are arranged in a parallel architecture (Yorke et al 1993, Staverv et al 2001). However, for example, functional heterogeneity within the lung is present in many patients ...
... normal lung. Such organs are constituted from many relatively identical and homogeneously distributed functional sub-units which are arranged in a parallel architecture (Yorke et al 1993, Staverv et al 2001). However, for example, functional heterogeneity within the lung is present in many patients ...
chapter 7. clinical treatment planning in external photon
... ignore inhomogeneities (often referred to as heterogeneities), perform bulk corrections on outlined organs, or use the CT data itself (with an appropriate conversion to electron density) for point-to-point correction. ...
... ignore inhomogeneities (often referred to as heterogeneities), perform bulk corrections on outlined organs, or use the CT data itself (with an appropriate conversion to electron density) for point-to-point correction. ...
Image Guided Patient Setup
... patient to patient, and depend on the procedure for patient set-up, with or without immobilization, as can be seen from an excellent overview by Langen et al. [43]. For prostate patients, to give a typical example, it has been well established that this gland moves considerably between fractions, ma ...
... patient to patient, and depend on the procedure for patient set-up, with or without immobilization, as can be seen from an excellent overview by Langen et al. [43]. For prostate patients, to give a typical example, it has been well established that this gland moves considerably between fractions, ma ...
Managing the imaging dose during Image-guided Radiotherapy Martin J Murphy PhD
... that can be observed on an individual basis. – stochastic risk –e.g, the increased risk of a secondary cancer – is probabilistic and is extrapolated from population-based data. ...
... that can be observed on an individual basis. – stochastic risk –e.g, the increased risk of a secondary cancer – is probabilistic and is extrapolated from population-based data. ...
Radiation Information for Hospital Personnel
... 3.1.2 Internal Sources Internal sources of background radiation include naturally occurring radioactive materials. We are born with some of them, some are deposited in our bodies from the food and water we eat and drink, and from the air we ...
... 3.1.2 Internal Sources Internal sources of background radiation include naturally occurring radioactive materials. We are born with some of them, some are deposited in our bodies from the food and water we eat and drink, and from the air we ...
The Modern Technology of Radiation Oncology, Vol. 1
... have been working in the field for some years as well as an educational tool for those who are entering the field. It is assumed that the reader has a basic knowledge of medical physics as found in other standard medical physics textbooks. ...
... have been working in the field for some years as well as an educational tool for those who are entering the field. It is assumed that the reader has a basic knowledge of medical physics as found in other standard medical physics textbooks. ...
SBRT: AAPM Task Group 101 Report
... potential inaccurate dose computation due to: 1. Use of conditions that require extrapolation of data beyond measurement range 2. Use of large grid size resulting in unexpected results for small structures Recommendation (TG 101): SBRT commonly includes extremely high-dose gradients near the bound ...
... potential inaccurate dose computation due to: 1. Use of conditions that require extrapolation of data beyond measurement range 2. Use of large grid size resulting in unexpected results for small structures Recommendation (TG 101): SBRT commonly includes extremely high-dose gradients near the bound ...
Research Center for Radiation Therapy
... dosimetric detectors like silicon diodes and CVD-diamonds, new dosimetry systems for medical use on the IMRT market, as well as improvements of their Racetrack accelerator system. The accelerator development is largely done in collaboration with C-RAD Innovation. Since IBAScanditronix also is one of ...
... dosimetric detectors like silicon diodes and CVD-diamonds, new dosimetry systems for medical use on the IMRT market, as well as improvements of their Racetrack accelerator system. The accelerator development is largely done in collaboration with C-RAD Innovation. Since IBAScanditronix also is one of ...
CURRICULUMVITAE E. ISHMAEL PARSAI, Ph.D., FACRO, FAAPM
... Since January of 2006, I have participated in numerous professional activities as an Expert Medical Physicist (EMP) performing various requested tasks. Those include but not limited to litigation cases, error assessment on ongoing litigations and recommendations for action, machine evaluation to ver ...
... Since January of 2006, I have participated in numerous professional activities as an Expert Medical Physicist (EMP) performing various requested tasks. Those include but not limited to litigation cases, error assessment on ongoing litigations and recommendations for action, machine evaluation to ver ...
Walter et al. (2007) Radiotherapy and Oncology 85
... While MV portal imaging with films was the standard procedure for patient positioning during the last decades, image quality was relatively poor despite significant additional dose when images had to be acquired from angles different to the treatment beam orientations. This dose, that is added to th ...
... While MV portal imaging with films was the standard procedure for patient positioning during the last decades, image quality was relatively poor despite significant additional dose when images had to be acquired from angles different to the treatment beam orientations. This dose, that is added to th ...
CT Dose Measures
... • Both data can be used in clinical practice to compare CT dose against national references • ED also permits direct comparisons of CT doses with other types of imaging studies and natural background ...
... • Both data can be used in clinical practice to compare CT dose against national references • ED also permits direct comparisons of CT doses with other types of imaging studies and natural background ...
Quality Assurance for Clinical Trials
... in cooperative group [organized, multi-institutional, National Cancer Institute (NCI)-funded] clinical trials. About 25% of these centers participate actively in that they treat more than 12 patients per year under protocol. In all cases, specific quality assurance (QA) procedures need to be perform ...
... in cooperative group [organized, multi-institutional, National Cancer Institute (NCI)-funded] clinical trials. About 25% of these centers participate actively in that they treat more than 12 patients per year under protocol. In all cases, specific quality assurance (QA) procedures need to be perform ...
Imaging in radiotherapy - Nuclear Sciences and Applications
... the accuracy of its spatial resolution. In the context of cancer, this is highly relevant when considering the desire to treat not only the gross tumor volume (GTV) but also deliver a dose to the surrounding clinical target volume (CTV), which may contain microscopic extension of the disease and is ...
... the accuracy of its spatial resolution. In the context of cancer, this is highly relevant when considering the desire to treat not only the gross tumor volume (GTV) but also deliver a dose to the surrounding clinical target volume (CTV), which may contain microscopic extension of the disease and is ...