An X-ray Source Model and Characterization Method for Computing
... the ∼9% of radiation therapy patients who develop a secondary cancer, ∼8% of the cancers (or ∼0.7% of the patients) will be induced by the therapy itself[19]. It is the responsibility of the radiation oncology and medical physics community to justify the risk posed by the radiation dose delivered to ...
... the ∼9% of radiation therapy patients who develop a secondary cancer, ∼8% of the cancers (or ∼0.7% of the patients) will be induced by the therapy itself[19]. It is the responsibility of the radiation oncology and medical physics community to justify the risk posed by the radiation dose delivered to ...
Managing Patient Dose in Multi-Detector Computed Tomography
... There are a number of new influencing parameters specific to MDCT which systematically increase or decrease patient dose compared to single-detector row CT scanners (SDCT). As in earlier developments in CT, there is potential for dose reduction, but the actual dose reduction depends upon how the sys ...
... There are a number of new influencing parameters specific to MDCT which systematically increase or decrease patient dose compared to single-detector row CT scanners (SDCT). As in earlier developments in CT, there is potential for dose reduction, but the actual dose reduction depends upon how the sys ...
Using Cone Beam CT in Clinical Practice
... third party has had any input into the development of course content. Requirements for Successful Completion: To obtain 2 CE credits for this educational activity you must pay the required fee, review the material, complete the course evaluation and obtain a score of at least 70%. CE Planner Disclos ...
... third party has had any input into the development of course content. Requirements for Successful Completion: To obtain 2 CE credits for this educational activity you must pay the required fee, review the material, complete the course evaluation and obtain a score of at least 70%. CE Planner Disclos ...
Chapter 15: Special Procedures and Techniques in
... Imaging equipment (CT, MRI and DSA) with which the structures, lesions and PTVs are visualized, defined and localized. Target localization software: used in conjunction with the stereotactic frame system and imaging equipment to determine the coordinates of the target in the stereotactic reference s ...
... Imaging equipment (CT, MRI and DSA) with which the structures, lesions and PTVs are visualized, defined and localized. Target localization software: used in conjunction with the stereotactic frame system and imaging equipment to determine the coordinates of the target in the stereotactic reference s ...
Characterization of the homogeneous tissue mixture approximation
... compared to the true mean dose to the glandular tissue. With the development of BCT, acquiring actual high resolution volumetric breast tissue distribution information in vivo is possible for the first time. Recently, Yi et al., using only four mastectomy specimens and a benchtop BCT system, perform ...
... compared to the true mean dose to the glandular tissue. With the development of BCT, acquiring actual high resolution volumetric breast tissue distribution information in vivo is possible for the first time. Recently, Yi et al., using only four mastectomy specimens and a benchtop BCT system, perform ...
European Commission. European guidelines on radiation protection
... practice should be as ‘evidence-based’ as possible. This document was developed using such an approach. The project team collected and analysed relevant published literature, guidelines that have proved effective in the past to arrive at recommendations that will contribute to optimisation of the us ...
... practice should be as ‘evidence-based’ as possible. This document was developed using such an approach. The project team collected and analysed relevant published literature, guidelines that have proved effective in the past to arrive at recommendations that will contribute to optimisation of the us ...
Estimativa de dose nos pulmões para procedimentos
... Figure 4 – (a). Siemens’s Straton X-ray tube and (b). Its schematics, showing the anode directly attached to the tube envelope (source: Siemens Healthcare GmbH, 2015, adapted). ........................ 29 Figure 5 – Detector arrays in modern computed tomography, in a perspective and side view. The s ...
... Figure 4 – (a). Siemens’s Straton X-ray tube and (b). Its schematics, showing the anode directly attached to the tube envelope (source: Siemens Healthcare GmbH, 2015, adapted). ........................ 29 Figure 5 – Detector arrays in modern computed tomography, in a perspective and side view. The s ...
American Association of Physicists in Medicine 40th Annual
... On behalf of the individuals listed above, I would like to thank all of those responsible for organizing the 1998 AAPM Annual Meeting. The success of the meeting is a result of the untiring efforts and voluntary time contributed by many AAPM Members. This is a landmark year for the Annual Meeting fo ...
... On behalf of the individuals listed above, I would like to thank all of those responsible for organizing the 1998 AAPM Annual Meeting. The success of the meeting is a result of the untiring efforts and voluntary time contributed by many AAPM Members. This is a landmark year for the Annual Meeting fo ...
PDF - IAEA Publications
... Identifiers: IAEAL 16-01070 | ISBN 978–92–0–100815–2 (paperback : alk. paper) Subjects: LCSH: Radiotherapy. | Cancer — Radiotherapy. | Radiation dosimetry. Classification: UDC 615.849 | STI/PUB/1679 ...
... Identifiers: IAEAL 16-01070 | ISBN 978–92–0–100815–2 (paperback : alk. paper) Subjects: LCSH: Radiotherapy. | Cancer — Radiotherapy. | Radiation dosimetry. Classification: UDC 615.849 | STI/PUB/1679 ...
Dose and image quality for a cone-beam C-arm
... various dose levels and tube voltages and an associated measurement method. Unlike conventional CT, the beam length covers the entire phantom, hence, the concept of computed tomography dose index 共CTDI兲 is not the metric of choice, and one can revert to conventional dosimetry methods by directly mea ...
... various dose levels and tube voltages and an associated measurement method. Unlike conventional CT, the beam length covers the entire phantom, hence, the concept of computed tomography dose index 共CTDI兲 is not the metric of choice, and one can revert to conventional dosimetry methods by directly mea ...
Interfractional and intrafractional setup errors in radiotherapy for
... coughing which may also contribute to the motion during treatment. For head and neck tumors, with online correction, the margin to cover 95% probability of interfractional and intrafractional errors would be 3 mm and, if the mechanical accuracy of treatment was considered, a five mm margin would suf ...
... coughing which may also contribute to the motion during treatment. For head and neck tumors, with online correction, the margin to cover 95% probability of interfractional and intrafractional errors would be 3 mm and, if the mechanical accuracy of treatment was considered, a five mm margin would suf ...
A Monte Carlo based three-dimensional dose reconstruction
... I. INTRODUCTION Intensity-modulated radiotherapy 共IMRT兲 allows the delivery of the radiation dose conformally to the tumor and/or sparing of normal tissues. IMRT can result in steep dose gradients between target volumes and organs at risk and therefore good quality control procedures are necessary f ...
... I. INTRODUCTION Intensity-modulated radiotherapy 共IMRT兲 allows the delivery of the radiation dose conformally to the tumor and/or sparing of normal tissues. IMRT can result in steep dose gradients between target volumes and organs at risk and therefore good quality control procedures are necessary f ...
Product Catalogue 2013/2014 Dosimetry and QA
... his having set up a business for the production of his invention, a dosemeter based on an electrostatic relay. It was out of sheer friendship back then that I went on a series of trips either to set up dosemeters or to instruct their users in the operation. Dr. Hammer himself had serious financial d ...
... his having set up a business for the production of his invention, a dosemeter based on an electrostatic relay. It was out of sheer friendship back then that I went on a series of trips either to set up dosemeters or to instruct their users in the operation. Dr. Hammer himself had serious financial d ...
Evaluation and Validation of Computed Tomography Dose Accuracy
... using two different devices and techniques. The Barracuda electrometer and Ion Chamber techniques were applied on a 16 slice Siemens CT scanner and the results compared to the console displayed CTDIw and CTDIvol valuesfor accuracy and compared to each other for validation purposes. With fixed exposu ...
... using two different devices and techniques. The Barracuda electrometer and Ion Chamber techniques were applied on a 16 slice Siemens CT scanner and the results compared to the console displayed CTDIw and CTDIvol valuesfor accuracy and compared to each other for validation purposes. With fixed exposu ...
06. Radiation Protection of Children During Computed Tomography
... Overview of CT systems: SDCT and MDCT. Dose levels in CT and risk attributable to paediatric CT. Importance of application of justification in paediatric CT. Optimization of image quality and patient dose in paediatric CT. Selection of appropriate technical parameters. Use of shielding devices in pa ...
... Overview of CT systems: SDCT and MDCT. Dose levels in CT and risk attributable to paediatric CT. Importance of application of justification in paediatric CT. Optimization of image quality and patient dose in paediatric CT. Selection of appropriate technical parameters. Use of shielding devices in pa ...
RADIATION MEDICINE QA
... his having set up a business for the production of his invention, a dosemeter based on an electrostatic relay. It was out of sheer friendship back then that I went on a series of trips either to set up dosemeters or to instruct their users in the operation. Dr. Hammer himself had serious financial d ...
... his having set up a business for the production of his invention, a dosemeter based on an electrostatic relay. It was out of sheer friendship back then that I went on a series of trips either to set up dosemeters or to instruct their users in the operation. Dr. Hammer himself had serious financial d ...
X-Ray Imaging and Computed Tomography
... CT have enabled the acquisition of full three-dimensional images in a single patient breath-hold. The major disadvantage of both X-ray and CT imaging is the fact that the technique uses ionizing radiation. Because ionizing radiation can cause tissue damage, there is a limit on the total radiation do ...
... CT have enabled the acquisition of full three-dimensional images in a single patient breath-hold. The major disadvantage of both X-ray and CT imaging is the fact that the technique uses ionizing radiation. Because ionizing radiation can cause tissue damage, there is a limit on the total radiation do ...
M C S O
... Keywords ................................................................................................................................ ii Abstract.................................................................................................................................. iii Table of Content ...
... Keywords ................................................................................................................................ ii Abstract.................................................................................................................................. iii Table of Content ...
Computed Tomography Radiation Safety Issues in Ontario
... diagnostic x-rays was estimated to be 1.1% in Canada, corresponding to 784 cases of cancer per year.(7) These figures might be an underestimate because of the increasing radiation dose from diagnostic x-rays over the past years. The cancer risk from 100 mSv (equivalent effective radiation dose of 10 ...
... diagnostic x-rays was estimated to be 1.1% in Canada, corresponding to 784 cases of cancer per year.(7) These figures might be an underestimate because of the increasing radiation dose from diagnostic x-rays over the past years. The cancer risk from 100 mSv (equivalent effective radiation dose of 10 ...
code of safe practice for the use of
... of Health by the Office of Radiation Safety. The Act establishes the Radiation Protection Advisory Council whose functions are to advise and make recommendations to the Director-General of Health and the Minister on matters relating to the Act and the Regulations. The term Director-General includes ...
... of Health by the Office of Radiation Safety. The Act establishes the Radiation Protection Advisory Council whose functions are to advise and make recommendations to the Director-General of Health and the Minister on matters relating to the Act and the Regulations. The term Director-General includes ...
3 Prostate Ragab Hani Donkol and Ahmad Al Nammi
... time imaging have allowed appreciation of blood flow, reduced examination time and improved quality of the image. These advances combined with the portability, relative low cost and lack of risks of iodinated contrast media and irradiation have made US one of the most useful modality in evaluation o ...
... time imaging have allowed appreciation of blood flow, reduced examination time and improved quality of the image. These advances combined with the portability, relative low cost and lack of risks of iodinated contrast media and irradiation have made US one of the most useful modality in evaluation o ...
European Journal of Medical Physics
... Francis R. Verdun. Institute of Radiation Physics (IRA), CHUV, Lausanne, Switzerland Introduction: Radiation protection in medicine is becoming a real challenge when dealing with the use of technologies such as CT, fluoroscopy and PET/CT. In Switzerland, since January 2012, medical physicists have to ...
... Francis R. Verdun. Institute of Radiation Physics (IRA), CHUV, Lausanne, Switzerland Introduction: Radiation protection in medicine is becoming a real challenge when dealing with the use of technologies such as CT, fluoroscopy and PET/CT. In Switzerland, since January 2012, medical physicists have to ...
QA for helical tomotherapy: Report of the AAPM Task Group 148
... in this report. However, several traditional QA recommendations are not applicable 共e.g., light field tests兲 to helical tomotherapy. On the other hand, important aspects of the tomotherapy treatment modality are not tested with traditional QA tests. This Task Group Report provides a comprehensive se ...
... in this report. However, several traditional QA recommendations are not applicable 共e.g., light field tests兲 to helical tomotherapy. On the other hand, important aspects of the tomotherapy treatment modality are not tested with traditional QA tests. This Task Group Report provides a comprehensive se ...
Hospital Outpatient Prospective Payment System and CY 2009
... The ACR believes important issues need to be addressed before implementing the five composites for CT, MR, and US. However, if CMS chooses to move forward there are a few changes that ACR believes must take place in order for hospitals to avoid creating incentives for hospitals to provide these ser ...
... The ACR believes important issues need to be addressed before implementing the five composites for CT, MR, and US. However, if CMS chooses to move forward there are a few changes that ACR believes must take place in order for hospitals to avoid creating incentives for hospitals to provide these ser ...
Garba_Idris_MASTERS
... this modality is recognized as delivering a high dose. CT, therefore, contributes significantly to the total collective effective dose to the population. Elimination of unnecessary or unproductive radiation exposure is necessary. To achieve this, practitioners must adhere to the principles of the ju ...
... this modality is recognized as delivering a high dose. CT, therefore, contributes significantly to the total collective effective dose to the population. Elimination of unnecessary or unproductive radiation exposure is necessary. To achieve this, practitioners must adhere to the principles of the ju ...
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.