New dimensions in endodontic imaging: Part 2. Cone beam
... Perhaps the most exciting area in which CBCT may be applied to endodontics is in determining the outcome of treatment. CBCT scans should result in a more objective and accurate determination of the prognosis of endodontic treatment. CBCT images are geometrically accurate (Murmulla et al. 2005) and t ...
... Perhaps the most exciting area in which CBCT may be applied to endodontics is in determining the outcome of treatment. CBCT scans should result in a more objective and accurate determination of the prognosis of endodontic treatment. CBCT images are geometrically accurate (Murmulla et al. 2005) and t ...
Dosimetry in diagnostic radiology : an
... techniques, and provides training and guidance on radiation measurements. Much of this work is carried out through the IAEA/WHO Secondary Standards Dosimetry Laboratory (SSDL) network. For some time now there has been a growing awareness that radiation dose originating from medical diagnostic proced ...
... techniques, and provides training and guidance on radiation measurements. Much of this work is carried out through the IAEA/WHO Secondary Standards Dosimetry Laboratory (SSDL) network. For some time now there has been a growing awareness that radiation dose originating from medical diagnostic proced ...
Criteria for Acceptability of Medical Radiological Equipment
... This report provides a compendium of criteria which radiological, nuclear medicine and 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 w ...
... This report provides a compendium of criteria which radiological, nuclear medicine and 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 w ...
optimisation and establishment of diagnostic
... radiography examinations in Portugal following an analysis and evaluation of current practice. Methods and materials: Anthropometric data (weight, patient height and thickness of the irradiated anatomy) was collected from 9,935 patients referred for a radiography procedure ...
... radiography examinations in Portugal following an analysis and evaluation of current practice. Methods and materials: Anthropometric data (weight, patient height and thickness of the irradiated anatomy) was collected from 9,935 patients referred for a radiography procedure ...
radiation protection in diagnostic radiology - RPOP
... • Referral criteria for all X Ray examinations of children should be established, especially those which may be age-related, e.g., scaphoid not ossified below age of 6 years; nasal bones cartilaginous below age of 3 years ...
... • Referral criteria for all X Ray examinations of children should be established, especially those which may be age-related, e.g., scaphoid not ossified below age of 6 years; nasal bones cartilaginous below age of 3 years ...
Principles and Practice of PET/CT
... cancer management [3]. These guidelines stipulated that specific geographical areas must have rapid access to PET-CT scanning and that the provision should be a uniformly high-quality service irrespective of where a patient lives. An interesting departure from the norm within the UK was that a sizea ...
... cancer management [3]. These guidelines stipulated that specific geographical areas must have rapid access to PET-CT scanning and that the provision should be a uniformly high-quality service irrespective of where a patient lives. An interesting departure from the norm within the UK was that a sizea ...
Principles and Practice of PET/CT
... Positron emission tomography (PET) is a tomographic imaging technique which allows non-invasive quantitative assessment of biochemical and functional processes. A range of positron emitters are available for use but 18F (combined with FDG – fluorodeoxyglucose) is the most commonly used. PET-CT has p ...
... Positron emission tomography (PET) is a tomographic imaging technique which allows non-invasive quantitative assessment of biochemical and functional processes. A range of positron emitters are available for use but 18F (combined with FDG – fluorodeoxyglucose) is the most commonly used. PET-CT has p ...
SU-8 2000 - MicroChem
... nm) is the recommended wavelength. SU-8 2000 may also be exposed with e-beam or x-ray radiation. Upon exposure, cross-linking proceeds in two steps (1) formation of a strong acid during the exposure step, followed by (2) acid-catalyzed, thermally driven epoxy cross-linking during the post exposure b ...
... nm) is the recommended wavelength. SU-8 2000 may also be exposed with e-beam or x-ray radiation. Upon exposure, cross-linking proceeds in two steps (1) formation of a strong acid during the exposure step, followed by (2) acid-catalyzed, thermally driven epoxy cross-linking during the post exposure b ...
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 ...
Cone beam computed tomography: Adding three dimensions to
... All the root canals are to be identified and thoroughly cleaned to achieve complete elimination of microbial flora. The presence of missed, undebrided canals lead to failure of endodontic treatment. Eliminating the anatomic noise and enabling to view the images in all planes make the CBCT system sup ...
... All the root canals are to be identified and thoroughly cleaned to achieve complete elimination of microbial flora. The presence of missed, undebrided canals lead to failure of endodontic treatment. Eliminating the anatomic noise and enabling to view the images in all planes make the CBCT system sup ...
An experimental approach to Automatic Exposure Control testing
... A New Zealand Qualified Health Physicist (QHP) is required, under the Radiation Protection Act of 1965 and the Radiation Protection Regulations 1982, to perform auditing compliance tests on x-ray equipment at regular intervals to ensure that this equipment conforms to the Code of Safe Practice with ...
... A New Zealand Qualified Health Physicist (QHP) is required, under the Radiation Protection Act of 1965 and the Radiation Protection Regulations 1982, to perform auditing compliance tests on x-ray equipment at regular intervals to ensure that this equipment conforms to the Code of Safe Practice with ...
Diagnostic X-Ray QA/QC
... The QUART didoSVM Medical survey meter is designed to detect beta, gamma and x-ray sources of very low intensity. Its modern design as well as premium technology underline the meter‘s strong performance within its scope of work. The QUART survey meter features an unrivalled energy response to measur ...
... The QUART didoSVM Medical survey meter is designed to detect beta, gamma and x-ray sources of very low intensity. Its modern design as well as premium technology underline the meter‘s strong performance within its scope of work. The QUART survey meter features an unrivalled energy response to measur ...
Diagnostic X-Ray QA/QC
... beams. The QUART nonius is technically highly flexible: it can be used in digital as well as conventional X-Ray Technology. In any case, its precision is an absolute strong point – as it goes down into to the nonius range of 0.1mm! Digitisation in x-ray technology makes traditional screen-films less ...
... beams. The QUART nonius is technically highly flexible: it can be used in digital as well as conventional X-Ray Technology. In any case, its precision is an absolute strong point – as it goes down into to the nonius range of 0.1mm! Digitisation in x-ray technology makes traditional screen-films less ...
4D-CT Lung Registration and its Application for Lung
... Chemotherapy delivers drugs in human body to kill fast growing cells or to stop these cells to proliferate. Since cancer cells grow much faster than most normal cells in human body, the drugs are well delivered to cancer cells, while surrounding normal cells remain safe. Unfortunately, certain cells ...
... Chemotherapy delivers drugs in human body to kill fast growing cells or to stop these cells to proliferate. Since cancer cells grow much faster than most normal cells in human body, the drugs are well delivered to cancer cells, while surrounding normal cells remain safe. Unfortunately, certain cells ...
PDF - IAEA Publications
... FOREWORD Radiotherapy is a key treatment modality for cancer patients. In recent years, there have been major developments in external beam radiotherapy, which has developed from simple two dimensional techniques to three dimensional image based conformal radiotherapy, intensity modulated radiother ...
... FOREWORD Radiotherapy is a key treatment modality for cancer patients. In recent years, there have been major developments in external beam radiotherapy, which has developed from simple two dimensional techniques to three dimensional image based conformal radiotherapy, intensity modulated radiother ...
Clinical Training of Medical Physicists Specializing in Diagnostic
... an important component of the work of the IAEA. The responsibility for the increasing technical aspects of this work is undertaken by the medical physicist. To ensure good practice in this vital area, structured clinical training programmes are required to complement academic learning. This publicat ...
... an important component of the work of the IAEA. The responsibility for the increasing technical aspects of this work is undertaken by the medical physicist. To ensure good practice in this vital area, structured clinical training programmes are required to complement academic learning. This publicat ...
QA for helical tomotherapy: Report of the AAPM Task Group 148
... resembles that of a helical CT scanner. The beam is generated by a 6 MV linear accelerator that is mounted on a slip ring gantry. The beam passes through a primary collimator and is further collimated into a fan-beam shape by an adjustable jaw. For further collimation, a binary multileaf collimator ...
... resembles that of a helical CT scanner. The beam is generated by a 6 MV linear accelerator that is mounted on a slip ring gantry. The beam passes through a primary collimator and is further collimated into a fan-beam shape by an adjustable jaw. For further collimation, a binary multileaf collimator ...
Sample pages 1 PDF
... 5. Property of PET detectors that allows them faster timing signals for coincidence detection and to work at high count rates is called: (A) The stopping power (B) Energy resolution (C) The decay constant (D) The light output 6. The picturing, description, and measurement of biological processes at ...
... 5. Property of PET detectors that allows them faster timing signals for coincidence detection and to work at high count rates is called: (A) The stopping power (B) Energy resolution (C) The decay constant (D) The light output 6. The picturing, description, and measurement of biological processes at ...
American Association of Physicists in Medicine 40th Annual
... This is a landmark year for the Annual Meeting for two prominent reasons. For the first time, both the positions of Scientific Program Director and Co-Director are filled by women members of the Association. Drs. Mary Martel and Maryellen Giger have worked diligently to develop an outstanding scient ...
... This is a landmark year for the Annual Meeting for two prominent reasons. For the first time, both the positions of Scientific Program Director and Co-Director are filled by women members of the Association. Drs. Mary Martel and Maryellen Giger have worked diligently to develop an outstanding scient ...
Evaluation of Parotid Gland Function using Equivalent - J
... Safe imaging modalities are needed for evaluating parotid gland function. The aim of this study was to validate the utility of a magnetic resonance imaging (MRI) tool, equivalent cross-relaxation rate imaging (ECRI), as a measurement of parotid gland function after chemoradiotherapy. Subjects compri ...
... Safe imaging modalities are needed for evaluating parotid gland function. The aim of this study was to validate the utility of a magnetic resonance imaging (MRI) tool, equivalent cross-relaxation rate imaging (ECRI), as a measurement of parotid gland function after chemoradiotherapy. Subjects compri ...
Structure of the Atom - The American Association of Physicists in
... Q4. The absorbed dose to the ovaries from a limited CT exam of 8 cm length, with a 2 cm thickness contiguous acquisition with the ovaries in the beam, is 8 mGy. If the study is expanded in length to cover 16 cm instead, which of the following descriptors of dose is correct? A. The dose to the ovarie ...
... Q4. The absorbed dose to the ovaries from a limited CT exam of 8 cm length, with a 2 cm thickness contiguous acquisition with the ovaries in the beam, is 8 mGy. If the study is expanded in length to cover 16 cm instead, which of the following descriptors of dose is correct? A. The dose to the ovarie ...
IMPLEMENTATION AND CHARACTERIZATION OF CONE-BEAM COMPUTED TOMOGRAPHY USING A COBALT-60
... irradiating treatment volumes within the patient with high energy gamma rays. Medical linear accelerators (linacs) began to replace Co-60 units during the 1960’s in more developed countries, but Co-60 has remained the main source of radiotherapy treatment in less developed countries around the world ...
... irradiating treatment volumes within the patient with high energy gamma rays. Medical linear accelerators (linacs) began to replace Co-60 units during the 1960’s in more developed countries, but Co-60 has remained the main source of radiotherapy treatment in less developed countries around the world ...
- University of Salford Institutional Repository
... a trade-off between dose and image quality, which limits by how much the dose can be reduced9. IR techniques generate images using several iterative steps to create images that are more precise10, meaning dose can be lowered. IR was used in first generation CTs, but despite it’s potential for dose r ...
... a trade-off between dose and image quality, which limits by how much the dose can be reduced9. IR techniques generate images using several iterative steps to create images that are more precise10, meaning dose can be lowered. IR was used in first generation CTs, but despite it’s potential for dose r ...
SADMFR guidelines for the use of cone-beam computed
... On January 24th and 25th, 2011 the SADMFR convened for the diagnose their own radiographs. However, in medical radiology first consensus workshop to establish indications and contra this is considered a comprehensive process performed by differ- indications for CBCT in dental medicine. This first c ...
... On January 24th and 25th, 2011 the SADMFR convened for the diagnose their own radiographs. However, in medical radiology first consensus workshop to establish indications and contra this is considered a comprehensive process performed by differ- indications for CBCT in dental medicine. This first c ...
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.