Evaluation of absorbed dose and image quality in mammography
... Mammography refers to the X-ray examination of the human breast, and is considered the single most important diagnostic tool in the early detection of breast cancer, which is by far the most common cancer among women. There is good evidence from clinical trials, that mammographic screening can reduc ...
... Mammography refers to the X-ray examination of the human breast, and is considered the single most important diagnostic tool in the early detection of breast cancer, which is by far the most common cancer among women. There is good evidence from clinical trials, that mammographic screening can reduc ...
Diagnostic Reference Levels in Medical Imaging
... The measurement of quantities related to patient dose for optimisation of protection in medical imaging with ionising radiation began more than half a century ago. Beginning in the 1950s, national surveys of such quantities for diagnostic x-ray examinations were performed in the United States and th ...
... The measurement of quantities related to patient dose for optimisation of protection in medical imaging with ionising radiation began more than half a century ago. Beginning in the 1950s, national surveys of such quantities for diagnostic x-ray examinations were performed in the United States and th ...
Variation of image counts with patient anatomy and development of... simulation system for whole-body bone scans.
... Figure 3. Simplified schematic of a modern gamma camera. The main components are outlined on the figure. ...................................................................................................... 19 Figure 4. Spatial discrimination principle for the gamma camera. The intensity of light p ...
... Figure 3. Simplified schematic of a modern gamma camera. The main components are outlined on the figure. ...................................................................................................... 19 Figure 4. Spatial discrimination principle for the gamma camera. The intensity of light p ...
Imaging dose from cone beam computed tomography in radiation
... and DOSXYZnrc codes, has been extensively used alongside other general purpose MC codes such as MCNP and Geant4 [48e51,58e71]. All publications found in our literature search reported 3D dose data calculated on voxelised geometries representing human anatomy, based on patient CT scans or virtual pha ...
... and DOSXYZnrc codes, has been extensively used alongside other general purpose MC codes such as MCNP and Geant4 [48e51,58e71]. All publications found in our literature search reported 3D dose data calculated on voxelised geometries representing human anatomy, based on patient CT scans or virtual pha ...
Brendan Hill - School of Physics
... gel [5]. A procedure for manufacturing what is now commonly referred to in the literature as PAG, an acronym for polyacrylamide gel, was later described [6]. Upon exposure of the radiological tissue equivalent [7] PAG dosimeter to radiation, polymerization of the co-monomers is induced by the free r ...
... gel [5]. A procedure for manufacturing what is now commonly referred to in the literature as PAG, an acronym for polyacrylamide gel, was later described [6]. Upon exposure of the radiological tissue equivalent [7] PAG dosimeter to radiation, polymerization of the co-monomers is induced by the free r ...
Sir Godfrey Newbold Hounsfield KT CBE. 28 August 1919
... inal work on what subsequently became known as CAT scanning in Cape Town in 1956, before publishing his results in 1963 and 1964 after moving to Tufts University in Medford, Massachusetts, USA. Cormack was later to be the joint winner, with Hounsfield, of the 1979 Nobel Prize in Physiology or Medici ...
... inal work on what subsequently became known as CAT scanning in Cape Town in 1956, before publishing his results in 1963 and 1964 after moving to Tufts University in Medford, Massachusetts, USA. Cormack was later to be the joint winner, with Hounsfield, of the 1979 Nobel Prize in Physiology or Medici ...
Gold Nanoparticle Contrast Agents in Advanced X
... High-energy (80 MeV) synchrotron sources first became available in the 1940s [11]. The accelerator-based strategy results in small source size, small angular divergence and high power sources, which cannot be provided by the standard Röntgen mechanism, even though they are required for novel radiolo ...
... High-energy (80 MeV) synchrotron sources first became available in the 1940s [11]. The accelerator-based strategy results in small source size, small angular divergence and high power sources, which cannot be provided by the standard Röntgen mechanism, even though they are required for novel radiolo ...
Cone beam computed tomography functionalities in dentistry
... no geometric distortion, and 3D demonstration. It is worth mentioning that, by using a relatively low ionic radiation, CBCT provides a 3D representation from hard tissues along with little information from soft tissues.[6] Common CT systems have similar advantages (in addition to providing informati ...
... no geometric distortion, and 3D demonstration. It is worth mentioning that, by using a relatively low ionic radiation, CBCT provides a 3D representation from hard tissues along with little information from soft tissues.[6] Common CT systems have similar advantages (in addition to providing informati ...
RBFM v5n1.indb
... n most developed countries, the medical physicists are acknowledged as essential professionals for the health field, thus earning a salary that corresponds to their responsibilities and activities. However, in some developing countries, professional acknowledgement is still in progress. In Brazil, m ...
... n most developed countries, the medical physicists are acknowledged as essential professionals for the health field, thus earning a salary that corresponds to their responsibilities and activities. However, in some developing countries, professional acknowledgement is still in progress. In Brazil, m ...
14th International Conference for X
... The excursion is available to all registered attendees. Please come to the lecture hall on Wednesday morning appropriately dressed for the excursion. We will be departing directly from the lecture hall. A boxed lunch will be available for registered attendees who selected an option during the regist ...
... The excursion is available to all registered attendees. Please come to the lecture hall on Wednesday morning appropriately dressed for the excursion. We will be departing directly from the lecture hall. A boxed lunch will be available for registered attendees who selected an option during the regist ...
Review of transmission scanning configurations in cardiac SPECT
... usually is equipped with a fan-beam collimator. But, based on the studies performed for attenuation correction, two “emission only” detectors may be equipped with parallel-hole or fan-beam collimators. Also, each detector acquire two data sets in two different energy windows: one centered on the emi ...
... usually is equipped with a fan-beam collimator. But, based on the studies performed for attenuation correction, two “emission only” detectors may be equipped with parallel-hole or fan-beam collimators. Also, each detector acquire two data sets in two different energy windows: one centered on the emi ...
Recent Advances in X-ray Phase Imaging - X
... As for X-ray image detectors,7) no special contrivance is needed for phase imaging provided that the spatial resolution is sufficient to resolve interference fringes. It should rather be emphasized that digital image processing is important for X-ray phase imaging. Taking a picture of a phase-contrast ...
... As for X-ray image detectors,7) no special contrivance is needed for phase imaging provided that the spatial resolution is sufficient to resolve interference fringes. It should rather be emphasized that digital image processing is important for X-ray phase imaging. Taking a picture of a phase-contrast ...
radiation protection in diagnostic radiology - RPOP
... tabletops and front plates of film-changers using carbon fiber and some new plastics enable significant reduction in patient doses ...
... tabletops and front plates of film-changers using carbon fiber and some new plastics enable significant reduction in patient doses ...
Principles and Practice of PET/CT
... His private radiology practice is within a nearby private hospital. His clinical PET-CT practice is conducted at a large teaching hospital, the Preston PET Centre, that is approximately 15 miles from the district general hospital. This teaching hospital provides a range of acute services to local re ...
... His private radiology practice is within a nearby private hospital. His clinical PET-CT practice is conducted at a large teaching hospital, the Preston PET Centre, that is approximately 15 miles from the district general hospital. This teaching hospital provides a range of acute services to local re ...
Principles and Practice of PET/CT
... local residents, serving a population of approximately 390,000 people. It also provides specialist services, such as plastic and brain surgery, to a catchment of 1.5 million people over a broad geographical area. The teaching hospital also has a radiotherapy unit which serves approximately 180 to 20 ...
... local residents, serving a population of approximately 390,000 people. It also provides specialist services, such as plastic and brain surgery, to a catchment of 1.5 million people over a broad geographical area. The teaching hospital also has a radiotherapy unit which serves approximately 180 to 20 ...
Imaging of small amounts of pleural fluid. Part one
... Collins11 showed that as little as 25 ml of pleural fluid (injected saline) on lateral erect chest radiograms could be detected as a subpulmonic accumulation of fluid in posterior costophrenic sulcus, but only with the presence of coexisting pneumoperitoneum. This is less reliable in practice, so we ...
... Collins11 showed that as little as 25 ml of pleural fluid (injected saline) on lateral erect chest radiograms could be detected as a subpulmonic accumulation of fluid in posterior costophrenic sulcus, but only with the presence of coexisting pneumoperitoneum. This is less reliable in practice, so we ...
IMPLEMENTATION AND CHARACTERIZATION OF CONE-BEAM COMPUTED TOMOGRAPHY USING A COBALT-60
... which would increase the accessibility of these modern improvements in radiotherapy treatment. However, for these modern treatments to improve patient outcome they require more precise localization of the patient prior to therapy. In more developed countries, this is currently provided by comparing ...
... which would increase the accessibility of these modern improvements in radiotherapy treatment. However, for these modern treatments to improve patient outcome they require more precise localization of the patient prior to therapy. In more developed countries, this is currently provided by comparing ...
Cone beam computed tomography and other imaging techniques in
... To be able to determine if endodontic treatment of apical pathosis is successful or not, healing of lesions is followed up by radiographic imaging. This can be done by observing changes in apical radiolucencies. Recently, cone beam computed tomography (CBCT) has been introduced as a method of gainin ...
... To be able to determine if endodontic treatment of apical pathosis is successful or not, healing of lesions is followed up by radiographic imaging. This can be done by observing changes in apical radiolucencies. Recently, cone beam computed tomography (CBCT) has been introduced as a method of gainin ...
Safety Reports Series No.59
... fluoroscopically-guided interventional procedures. In this case, the objective is to avoid, [where clinically appropriate1], deterministic effects in individual patients undergoing justified, but long and complex procedures. The need here is to monitor in real time whether the threshold doses for de ...
... fluoroscopically-guided interventional procedures. In this case, the objective is to avoid, [where clinically appropriate1], deterministic effects in individual patients undergoing justified, but long and complex procedures. The need here is to monitor in real time whether the threshold doses for de ...
MICHIGAN DEPARTMENT OF PUBLIC HEALTH RADIATION
... (3) "Personnel barrier" means a barrier which restricts personnel from potential radiation exposure by restricting access to the vicinity of a source of radiation. (4) "Personnel monitoring equipment" means a device such as a film badge, pocket dosimeter or thermoluminescent dosimeter (TLD) designe ...
... (3) "Personnel barrier" means a barrier which restricts personnel from potential radiation exposure by restricting access to the vicinity of a source of radiation. (4) "Personnel monitoring equipment" means a device such as a film badge, pocket dosimeter or thermoluminescent dosimeter (TLD) designe ...
A Guide to CT Radiation Dose Management
... equal to the absorbed dose expressed in Gy. This quantity is occasionally, but not commonly, used in discussing radiation from CT scans. It is preferable not to use it because of possible confusion with the quantity “effective dose.” Effective Dose: A calculated quantity that goes beyond equivalent ...
... equal to the absorbed dose expressed in Gy. This quantity is occasionally, but not commonly, used in discussing radiation from CT scans. It is preferable not to use it because of possible confusion with the quantity “effective dose.” Effective Dose: A calculated quantity that goes beyond equivalent ...
X-ray spectral measurements for tungsten
... rate. The good alignment of the axis of the double-pinholespectrometer assembly with the tungsten focal track could minimize the contribution of off-focus x-ray photons from the molybdenum anode disk in the measured spectra. Since the filter-collimation assembly was removed during the spectral measu ...
... rate. The good alignment of the axis of the double-pinholespectrometer assembly with the tungsten focal track could minimize the contribution of off-focus x-ray photons from the molybdenum anode disk in the measured spectra. Since the filter-collimation assembly was removed during the spectral measu ...
Acceptance Testing and Quality Control of Photostimulable
... goal of this task group report. This document includes an overview of a typical PSP imaging system, functional specifications, testing methodology, and a bibliography. The main body of the report includes a description of generic, non-invasive tests that are applicable to a variety of PSP units. Sin ...
... goal of this task group report. This document includes an overview of a typical PSP imaging system, functional specifications, testing methodology, and a bibliography. The main body of the report includes a description of generic, non-invasive tests that are applicable to a variety of PSP units. Sin ...
The management of imaging dose during image-guided
... difficult to estimate the total dose that the patient will receive during a particular treatment scenario. This problem is compounded by the fact that equipment configurations 共such as source/patient distance兲 developed for radiotherapy guidance often differ significantly from their diagnostic imagi ...
... difficult to estimate the total dose that the patient will receive during a particular treatment scenario. This problem is compounded by the fact that equipment configurations 共such as source/patient distance兲 developed for radiotherapy guidance often differ significantly from their diagnostic imagi ...
The management of imaging dose during image-guided
... difficult to estimate the total dose that the patient will receive during a particular treatment scenario. This problem is compounded by the fact that equipment configurations 共such as source/patient distance兲 developed for radiotherapy guidance often differ significantly from their diagnostic imagi ...
... difficult to estimate the total dose that the patient will receive during a particular treatment scenario. This problem is compounded by the fact that equipment configurations 共such as source/patient distance兲 developed for radiotherapy guidance often differ significantly from their diagnostic imagi ...