3D dose verification for advanced radiotherapy
... dosimetry is presented in Chapter 2, where a review of published methods of performing dosimetry with EPIDs is given. This review focuses on the dosimetric characteristics of EPIDs, the various ways of calibrating an EPID for dosimetry and application of the EPID for transmission based and non-trans ...
... dosimetry is presented in Chapter 2, where a review of published methods of performing dosimetry with EPIDs is given. This review focuses on the dosimetric characteristics of EPIDs, the various ways of calibrating an EPID for dosimetry and application of the EPID for transmission based and non-trans ...
Dosimetry in diagnostic radiology : an
... Standards Dosimetry Laboratory (SSDL) network. For some time now there has been a growing awareness that radiation dose originating from medical diagnostic procedures in radiology is contributing an increasing proportion of the total population dose. This has been particularly evident for examinatio ...
... Standards Dosimetry Laboratory (SSDL) network. For some time now there has been a growing awareness that radiation dose originating from medical diagnostic procedures in radiology is contributing an increasing proportion of the total population dose. This has been particularly evident for examinatio ...
Piranha Reference Manual - English - 5.5G
... Accessory to diagnostic X-ray equipment to be used as an electrometer. Together with external probes it is to be used for independent service and quality control, as well as measurements of kerma, kerma rate, kVp, tube current, exposure time, luminance, and illuminance within limitations stated belo ...
... Accessory to diagnostic X-ray equipment to be used as an electrometer. Together with external probes it is to be used for independent service and quality control, as well as measurements of kerma, kerma rate, kVp, tube current, exposure time, luminance, and illuminance within limitations stated belo ...
ONR - Radiation shielding - Office for Nuclear Regulation
... radioactive sources. In general, wherever reasonably practicable, remote control operations should be chosen in preference to manual handling. In cases where remote control is not reasonably practicable, licensees should consider the use of tongs or other similar handling aids for use with such sour ...
... radioactive sources. In general, wherever reasonably practicable, remote control operations should be chosen in preference to manual handling. In cases where remote control is not reasonably practicable, licensees should consider the use of tongs or other similar handling aids for use with such sour ...
Diagnostic Reference Levels in Medical Imaging
... Approved by the Commission in Month 201X Abstract-The International Commission on Radiological Protection (ICRP) first introduced the term ‘diagnostic reference level’ (DRL) in Publication 73 (1996). The concept was subsequently developed further, and practical guidance was provided in 2001. DRLs ha ...
... Approved by the Commission in Month 201X Abstract-The International Commission on Radiological Protection (ICRP) first introduced the term ‘diagnostic reference level’ (DRL) in Publication 73 (1996). The concept was subsequently developed further, and practical guidance was provided in 2001. DRLs ha ...
PDF - IAEA Publications
... registered) does not imply any intention to infringe proprietary rights, nor should it be construed as an endorsement or recommendation on the part of the IAEA. The authors are responsible for having obtained the necessary permission for the IAEA to reproduce, translate or use material from sources ...
... registered) does not imply any intention to infringe proprietary rights, nor should it be construed as an endorsement or recommendation on the part of the IAEA. The authors are responsible for having obtained the necessary permission for the IAEA to reproduce, translate or use material from sources ...
portal dosimetry in radiotherapy
... In case of dose‐guided radiation therapy (DGRT), a treatment is adapted based on direct dose measurements in combination with the results of IGRT procedures. Dose measurements can be done prior to treatment (pre‐treatment measurements) and during treatment (in v ...
... In case of dose‐guided radiation therapy (DGRT), a treatment is adapted based on direct dose measurements in combination with the results of IGRT procedures. Dose measurements can be done prior to treatment (pre‐treatment measurements) and during treatment (in v ...
Biologically conformal radiation therapy and Monte
... Highly structured dose distributions can be delivered using intensitymodulated radiation therapy (IMRT). IMRT can thus reduce toxicity by allowing a selective reduction of the dose to organs at risk, or allow dose escalation with the aim to improve local control. In current clinical practice, IMRT o ...
... Highly structured dose distributions can be delivered using intensitymodulated radiation therapy (IMRT). IMRT can thus reduce toxicity by allowing a selective reduction of the dose to organs at risk, or allow dose escalation with the aim to improve local control. In current clinical practice, IMRT o ...
American Association of Physicists in Medicine 40th Annual
... A and B. Blocks C and D correspond primarily to the scientific sessions, however there is an occasional symposium in these time blocks as well. Block E is reserved primarily to the afternoon symposia, however occasionally scientific sessions may be in these time blocks as well. In general, Tracks 1 ...
... A and B. Blocks C and D correspond primarily to the scientific sessions, however there is an occasional symposium in these time blocks as well. Block E is reserved primarily to the afternoon symposia, however occasionally scientific sessions may be in these time blocks as well. In general, Tracks 1 ...
European Journal of Medical Physics
... challenges for eye lens dosimetry are coming from the 2011 ICRP statement recommending a new and lower eye lens dose limit. Staff monitoring, aiming to assure the compliance with the dose limits, is in general affected by large uncertainties for staff exposed near the radiation source and partially ...
... challenges for eye lens dosimetry are coming from the 2011 ICRP statement recommending a new and lower eye lens dose limit. Staff monitoring, aiming to assure the compliance with the dose limits, is in general affected by large uncertainties for staff exposed near the radiation source and partially ...
QA for helical tomotherapy: Report of the AAPM Task Group 148
... guidelines of newer technologies, there are several commercially available technologies that are sufficiently different from C-arm type accelerators and require a unique set of QA recommendations. One such technology is helical tomotherapy. It is therefore the intent of this Task Group Report to pro ...
... guidelines of newer technologies, there are several commercially available technologies that are sufficiently different from C-arm type accelerators and require a unique set of QA recommendations. One such technology is helical tomotherapy. It is therefore the intent of this Task Group Report to pro ...
Radiological Protection in Cone Beam Computed Tomography
... doses to patients without compromising diagnostic or clinical purpose. In recent years there has been evaluation of practice that indicated that large number of imaging procedures have not met the appropriateness guidelines. While ICRP has provided three levels of justification, there is increasing ...
... doses to patients without compromising diagnostic or clinical purpose. In recent years there has been evaluation of practice that indicated that large number of imaging procedures have not met the appropriateness guidelines. While ICRP has provided three levels of justification, there is increasing ...
CLASSlCAL RADIATION THERAPY
... Photon fluence emitted by a point source of radiation varies inversely as a square of the distance from the source. Although the clinical source (isotopic source or focal spot) for external beam therapy has a finite size, the source-surface distance is usually chosen to be large (280 cm) so that the ...
... Photon fluence emitted by a point source of radiation varies inversely as a square of the distance from the source. Although the clinical source (isotopic source or focal spot) for external beam therapy has a finite size, the source-surface distance is usually chosen to be large (280 cm) so that the ...
M C S O
... suggest that the use of a large wedge angle generates greater dose variation for both parallel and perpendicular motions. The use of small field size with a large tumor motion results in the loss of wedged dose distribution for both parallel and perpendicular motion. From these single ...
... suggest that the use of a large wedge angle generates greater dose variation for both parallel and perpendicular motions. The use of small field size with a large tumor motion results in the loss of wedged dose distribution for both parallel and perpendicular motion. From these single ...
image guided radiation therapy applications for
... treatment. Node volumes shrunk to 17% of the initial volume, moved up 1.3 cm, and received up to a 12% lower dose than that prescribed. It is shown that difficulties in imaging soft tissue in the neck region are circumvented with ultrasound imaging, and after dosimetric verification it is argued th ...
... treatment. Node volumes shrunk to 17% of the initial volume, moved up 1.3 cm, and received up to a 12% lower dose than that prescribed. It is shown that difficulties in imaging soft tissue in the neck region are circumvented with ultrasound imaging, and after dosimetric verification it is argued th ...
An X-ray Source Model and Characterization Method for Computing
... independent variables: the transverse-axis spectra; and the transverse- and radial-axis fluence profiles. This work demonstrates that kV x-ray sources can be characterized using in-air ionization chamber measurements of HVL and kerma profiles. The characterization method and model are validated by c ...
... independent variables: the transverse-axis spectra; and the transverse- and radial-axis fluence profiles. This work demonstrates that kV x-ray sources can be characterized using in-air ionization chamber measurements of HVL and kerma profiles. The characterization method and model are validated by c ...
Cone-Beam Computed Tomography Examinations of
... risk is determined by the cumulative dose of lifetime exposures to ionising radiation. For an individual, the risk of stochastic effects can be regarded as relatively small even in the case of relatively high cumulative doses. [66, p. 45] However, stochastic effects can lead to a significant health ...
... risk is determined by the cumulative dose of lifetime exposures to ionising radiation. For an individual, the risk of stochastic effects can be regarded as relatively small even in the case of relatively high cumulative doses. [66, p. 45] However, stochastic effects can lead to a significant health ...
Tomotherapy vs IMRT (952kB PPT)
... - Linacs also provide the ability to deliver electron fields. For many superficial targets, the use of electrons from a linear accelerator is clearly a better choice for its simplicity of dose delivery as well as its higher skin dose and sharper dose fall-off beyond the target. - For the ability to ...
... - Linacs also provide the ability to deliver electron fields. For many superficial targets, the use of electrons from a linear accelerator is clearly a better choice for its simplicity of dose delivery as well as its higher skin dose and sharper dose fall-off beyond the target. - For the ability to ...
12 Physics and Clinical Aspects of Brachytherapy
... brachytherapy sources have half-lives ranging from days to years. The length of a given brachytherapy source’s half-life determines its shelf life, namely, whether a source can be stored and used repeatedly over a long period of time. Sources with shorter halflives, such as 125I and 103Pd sources, n ...
... brachytherapy sources have half-lives ranging from days to years. The length of a given brachytherapy source’s half-life determines its shelf life, namely, whether a source can be stored and used repeatedly over a long period of time. Sources with shorter halflives, such as 125I and 103Pd sources, n ...
International Workshop on Monte Carlo Techniques in Medical
... The novel field of small animal radiotherapy (SmART) image-guided precision research aims to downscale radiotherapy to the size of small animals, enabling the study of models for radiation response of normal tissue and tumors. Novel image-guided precision irradiators are now available that greatly f ...
... The novel field of small animal radiotherapy (SmART) image-guided precision research aims to downscale radiotherapy to the size of small animals, enabling the study of models for radiation response of normal tissue and tumors. Novel image-guided precision irradiators are now available that greatly f ...
Tumor Dosimetry in a Phase I Study of Lu(177)-DOTA
... dosimetry, where the inhomogeneous distribution of the absorbed dose is taken into account will also be discussed. ...
... dosimetry, where the inhomogeneous distribution of the absorbed dose is taken into account will also be discussed. ...
A literature review of electronic portal imaging for
... relevant cited references in these papers, published in English between 1985 and January 2008 were included. ...
... relevant cited references in these papers, published in English between 1985 and January 2008 were included. ...
Assessing The Clinical Application Of The Van Herk Margin Formula
... The van Herk margin formula (VHMF) was developed to calculate the minimum margin on the target to provide full coverage by 95% of the prescribed dose to 90% of the population. However, this formula is based on an ideal dose profile model that is not realistic for lung radiotherapy. The purpose of th ...
... The van Herk margin formula (VHMF) was developed to calculate the minimum margin on the target to provide full coverage by 95% of the prescribed dose to 90% of the population. However, this formula is based on an ideal dose profile model that is not realistic for lung radiotherapy. The purpose of th ...
Development and Implementation of an Anthropomorphic Pediatric
... Table 3.11 2D Gamma Analysis Passing Rates for Spot Scanning Trials……………………..61 Figure 3.17 Images of the digitized film in the a) coronal and b) sagittal planes for Spot Scanning Trial 3. ………………………………………………………..………………….62 Table 3.12 Spot Scanning Trials Average Distance to Agreement Results…………………. ...
... Table 3.11 2D Gamma Analysis Passing Rates for Spot Scanning Trials……………………..61 Figure 3.17 Images of the digitized film in the a) coronal and b) sagittal planes for Spot Scanning Trial 3. ………………………………………………………..………………….62 Table 3.12 Spot Scanning Trials Average Distance to Agreement Results…………………. ...
Radiation Dose and Image Quality in Computed
... The aim of this study was to evaluate and compare the radiation doses imparted to patients undergoing computed tomography (CT) examinations and image quality with the use of automatic exposure control (AEC) and fixed tube current (FTC) techniques using a head and body phantom in a Siemens emotion 16 ...
... The aim of this study was to evaluate and compare the radiation doses imparted to patients undergoing computed tomography (CT) examinations and image quality with the use of automatic exposure control (AEC) and fixed tube current (FTC) techniques using a head and body phantom in a Siemens emotion 16 ...