the quantification of cr and dr image quality and patient dose for
... F-10 Newborn effective doses for Canon DR system at 55 kVp....................................193 F-11 Newborn effective doses for Canon DR system at 60 kVp....................................195 F-12 Newborn effective doses for Canon DR system at 65 kVp....................................197 F-13 N ...
... F-10 Newborn effective doses for Canon DR system at 55 kVp....................................193 F-11 Newborn effective doses for Canon DR system at 60 kVp....................................195 F-12 Newborn effective doses for Canon DR system at 65 kVp....................................197 F-13 N ...
Detection of pulmonary nodules in chest tomosynthesis
... most challenging tasks for the thoracic radiologist is the detection of pulmonary nodules12, i.e. small rounded structures which may potentially be malignant. Because of the difficulty of the task, but also because of the great clinical importance of pulmonary nodules, the detectability of these les ...
... most challenging tasks for the thoracic radiologist is the detection of pulmonary nodules12, i.e. small rounded structures which may potentially be malignant. Because of the difficulty of the task, but also because of the great clinical importance of pulmonary nodules, the detectability of these les ...
ACR-AAPM Practice Parameter For Reference Levels And
... maximum administered activities for adults and children are available from various publications [1-13,17]. This is the initial practice parameter on nuclear medicine RLs. Although the recommendations are based on limited survey data, they are the best available data we have for the modality. Refere ...
... maximum administered activities for adults and children are available from various publications [1-13,17]. This is the initial practice parameter on nuclear medicine RLs. Although the recommendations are based on limited survey data, they are the best available data we have for the modality. Refere ...
diagnostic imaging in the community
... Why install X-ray equipment in a small hospital if there is a larger hospital to which patients can be sent? It may seem easy for patients in a suburb of a big city to go to a large central hospital. However, there is often difficulty in transport and ambulances are needed, both to take the patient ...
... Why install X-ray equipment in a small hospital if there is a larger hospital to which patients can be sent? It may seem easy for patients in a suburb of a big city to go to a large central hospital. However, there is often difficulty in transport and ambulances are needed, both to take the patient ...
MICHIGAN DEPARTMENT OF PUBLIC HEALTH RADIATION
... charge of the ions of 1 sign produced in air when all the electrons (negatrons and positrons) liberated by photons in a volume element of air having mass dm are completely stopped in air. The special unit of exposure is the roentgen. (3) "Exposure rate" means the exposure per unit of time, such as R ...
... charge of the ions of 1 sign produced in air when all the electrons (negatrons and positrons) liberated by photons in a volume element of air having mass dm are completely stopped in air. The special unit of exposure is the roentgen. (3) "Exposure rate" means the exposure per unit of time, such as R ...
cone beam ct for dental and maxillofacial radiology
... models; research evidence for one CBCT machine may not apply to other equipment. As a consequence, caution is needed in generalising research findings. Many of the recommendations made are “Best Practice” rather than carrying any formal evidence grade, based upon the informed judgement of the Guidel ...
... models; research evidence for one CBCT machine may not apply to other equipment. As a consequence, caution is needed in generalising research findings. Many of the recommendations made are “Best Practice” rather than carrying any formal evidence grade, based upon the informed judgement of the Guidel ...
Optimisation of radiation dose and image quality for AP pelvis
... 5.2.2.3. Optimisation strategies in digital radiography (CR & DR) ................................ 106 5.2.3. Computed radiography-detector (physical overview) ............................................... 111 5.2.4. Radiographic acquisition factors (Technological and Operational) ................ ...
... 5.2.2.3. Optimisation strategies in digital radiography (CR & DR) ................................ 106 5.2.3. Computed radiography-detector (physical overview) ............................................... 111 5.2.4. Radiographic acquisition factors (Technological and Operational) ................ ...
3D dose verification for advanced radiotherapy
... overview on the use of electronic portal imaging devices (EPIDs) for (pre-)treatment 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 a ...
... overview on the use of electronic portal imaging devices (EPIDs) for (pre-)treatment 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 a ...
European Guidelines on DRLs for Paediatric Imaging
... might not be justified on the basis of image quality requirements. DRLs should be set for common examinations using easily measurable dose quantities. National DRLs are usually set by a collaboration of authorities and professional societies, typically using a percentile point (most commonly 75% or ...
... might not be justified on the basis of image quality requirements. DRLs should be set for common examinations using easily measurable dose quantities. National DRLs are usually set by a collaboration of authorities and professional societies, typically using a percentile point (most commonly 75% or ...
MIRD Pamphlet No. 23: Quantitative SPECT for Patient
... predictive of biologic effects. Although this may be true for stochastic biologic effects (e.g., cancer induction), there is mounting evidence that this is not the case for deterministic effects (e.g., tumor control and normal-organ toxicity). The implications of nonuniform dose and dose-rate distri ...
... predictive of biologic effects. Although this may be true for stochastic biologic effects (e.g., cancer induction), there is mounting evidence that this is not the case for deterministic effects (e.g., tumor control and normal-organ toxicity). The implications of nonuniform dose and dose-rate distri ...
Cone Beam Ct for Dental and Maxillofacial Radiology
... Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use that might be made of the following information. The views expressed in this publication/document/guidelines are the sole responsibility of the author and do not necessarily reflect the views ...
... Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use that might be made of the following information. The views expressed in this publication/document/guidelines are the sole responsibility of the author and do not necessarily reflect the views ...
Anniversary Paper: Development of x
... Researchers in this era devoted substantial effort to characterizing the physical properties of CT scanners that affect image quality. While much proprietary research took place within the numerous companies developing scanners, a number of academic groups investigated these effects and reported the ...
... Researchers in this era devoted substantial effort to characterizing the physical properties of CT scanners that affect image quality. While much proprietary research took place within the numerous companies developing scanners, a number of academic groups investigated these effects and reported the ...
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 ...
CCR Template - Colorado Secretary of State
... “C-arm x-ray system” means an x-ray system in which the image receptor and x-ray tube housing assembly are connected by a common mechanical support system OR COORDINATED in order to maintain a desired spatial relationship. This system is designed to allow a change in the projection of the beam throu ...
... “C-arm x-ray system” means an x-ray system in which the image receptor and x-ray tube housing assembly are connected by a common mechanical support system OR COORDINATED in order to maintain a desired spatial relationship. This system is designed to allow a change in the projection of the beam throu ...
AdoptedRules02009-00806 - Colorado Secretary of State
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
Code of Colorado Regulations - Colorado Secretary of State
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
... “Aluminum equivalent” means the thickness of aluminum (type 1100 alloy with a nominal chemical composition of aluminum 99.00 percent minimum and copper 0.12 percent maximum) affording the same attenuation, under specified conditions, as the material in question. “Attenuation block” means a block or ...
medical physics international
... (2/04/2013 – 19/07/2013) the journal web site had 12,474 visitors. Papers from all sections of the MPI Journal have been downloaded hundreds of times, what shows that the construction and coverage of the Journal have been well chosen by the Editorial team. The Journal will continue to support these ...
... (2/04/2013 – 19/07/2013) the journal web site had 12,474 visitors. Papers from all sections of the MPI Journal have been downloaded hundreds of times, what shows that the construction and coverage of the Journal have been well chosen by the Editorial team. The Journal will continue to support these ...
Review Article Use of Cone Beam Computed Tomography in
... dose for imaging of the head include the bone marrow, thyroid, esophagus, skin, bone surface, salivary glands, brain, and “remainder” tissues [16]. Published effective doses for digital panoramic radiographs range from 5.5 to 22.0 μSv [17], while digital cephalometric radiographs have effective doses ...
... dose for imaging of the head include the bone marrow, thyroid, esophagus, skin, bone surface, salivary glands, brain, and “remainder” tissues [16]. Published effective doses for digital panoramic radiographs range from 5.5 to 22.0 μSv [17], while digital cephalometric radiographs have effective doses ...
Safety Code 35: Radiation Protection in Radiology
... and radioscopy can be significantly higher. However, with well-designed, installed and maintained X-ray equipment, and through use of proper procedures by trained operators, unnecessary exposure to patients can be reduced significantly, with no decrease in the value of medical information derived. T ...
... and radioscopy can be significantly higher. However, with well-designed, installed and maintained X-ray equipment, and through use of proper procedures by trained operators, unnecessary exposure to patients can be reduced significantly, with no decrease in the value of medical information derived. T ...
Safety Code 35: Radiation Protection in Radiology
... and radioscopy can be significantly higher. However, with well-designed, installed and maintained X-ray equipment, and through use of proper procedures by trained operators, unnecessary exposure to patients can be reduced significantly, with no decrease in the value of medical information derived. T ...
... and radioscopy can be significantly higher. However, with well-designed, installed and maintained X-ray equipment, and through use of proper procedures by trained operators, unnecessary exposure to patients can be reduced significantly, with no decrease in the value of medical information derived. T ...
Criteria for Acceptability of Medical Radiological Equipment used in
... radiotherapy equipment in normal use ought to be able to pass. The most common form of criterion is a “suspension level” for a measurement of a performance or safety parameter. Failure to meet a suspension level will establish that the operation of the equipment involved is sufficiently poor to rais ...
... radiotherapy equipment in normal use ought to be able to pass. The most common form of criterion is a “suspension level” for a measurement of a performance or safety parameter. Failure to meet a suspension level will establish that the operation of the equipment involved is sufficiently poor to rais ...
Biologically conformal radiation therapy and Monte
... distributions with great accuracy. The use of MC is especially advantageous in case of small, irregular treatment fields delivering dose to regions of great tissue inhomogeneity, for example in IMRT treatment of head and neck or lung tumors. In this thesis, the added value of MC compared to pencil b ...
... distributions with great accuracy. The use of MC is especially advantageous in case of small, irregular treatment fields delivering dose to regions of great tissue inhomogeneity, for example in IMRT treatment of head and neck or lung tumors. In this thesis, the added value of MC compared to pencil b ...
Process Management and Quality Assurance for Intracranial
... latter using add-ons like cones and MLC; 2) the rapid development of relocatable frames instead of invasive frames, allowing the introduction of fractionated stereotactic treatment; 3) the implementation of frameless stereotactic radiosurgery and radiotherapy in combination with imaged guided positi ...
... latter using add-ons like cones and MLC; 2) the rapid development of relocatable frames instead of invasive frames, allowing the introduction of fractionated stereotactic treatment; 3) the implementation of frameless stereotactic radiosurgery and radiotherapy in combination with imaged guided positi ...
Diagnostic Reference Levels in Medical Imaging
... justified. Note that no address, affiliation, or e-mail/fax information should be given. AUTHOR (S) ...
... justified. Note that no address, affiliation, or e-mail/fax information should be given. AUTHOR (S) ...
cone beam ct: non-dental applications
... Conventional lateral cephalograms were used for many years for ortho dontic assessment, treatment and follow-up. On these 2D projection images both the bony structures and the overlying soft tissues could be evaluated and measured prior to surgery or non-surgical orthodontic treatment. Maxillofacia ...
... Conventional lateral cephalograms were used for many years for ortho dontic assessment, treatment and follow-up. On these 2D projection images both the bony structures and the overlying soft tissues could be evaluated and measured prior to surgery or non-surgical orthodontic treatment. Maxillofacia ...
Radiation burn
A radiation burn is damage to the skin or other biological tissue caused by exposure to radiation. The radiation types of greatest concern are thermal radiation, radio frequency energy, ultraviolet light and ionizing radiation.The most common type of radiation burn is a sunburn caused by UV radiation. High exposure to X-rays during diagnostic medical imaging or radiotherapy can also result in radiation burns. As the ionizing radiation interacts with cells within the body—damaging them—the body responds to this damage, typically resulting in erythema—that is, redness around the damaged area. Radiation burns are often associated with radiation-induced cancer due to the ability of ionizing radiation to interact with and damage DNA, occasionally inducing a cell to become cancerous. Cavity magnetrons can be improperly used to create surface and internal burning. Depending on the photon energy, gamma radiation can cause very deep gamma burns, with 60Co internal burns are common. Beta burns tend to be shallow as beta particles are not able to penetrate deep into the person; these burns can be similar to sunburn.Radiation burns can also occur with high power radio transmitters at any frequency where the body absorbs radio frequency energy and converts it to heat. The U.S. Federal Communications Commission (FCC) considers 50 watts to be the lowest power above which radio stations must evaluate emission safety. Frequencies considered especially dangerous occur where the human body can become resonant, at 35 MHz, 70 MHz, 80-100 MHz, 400 MHz, and 1 GHz. Exposure to microwaves of too high intensity can cause microwave burns.