SERIES IAEA HUMAN HEALTH SERIES
... The application of radiation in the diagnosis and treatment of disease is an important component of the work of the IAEA. In the area of diagnostic radiology, this work is currently focused on quality assurance (QA) methods to promote the effective use of radiation for a diagnostic outcome through a ...
... The application of radiation in the diagnosis and treatment of disease is an important component of the work of the IAEA. In the area of diagnostic radiology, this work is currently focused on quality assurance (QA) methods to promote the effective use of radiation for a diagnostic outcome through a ...
The management of imaging dose during image-guided
... intensive兲 real-time monitoring is done via dual orthogonal fluoroscopes that continually image the treatment site throughout the fraction.11 Therefore real-time management of respiratory motion potentially involves the most radiographic exposure of all image-guided radiotherapy procedures. The inse ...
... intensive兲 real-time monitoring is done via dual orthogonal fluoroscopes that continually image the treatment site throughout the fraction.11 Therefore real-time management of respiratory motion potentially involves the most radiographic exposure of all image-guided radiotherapy procedures. The inse ...
The management of imaging dose during image-guided
... intensive兲 real-time monitoring is done via dual orthogonal fluoroscopes that continually image the treatment site throughout the fraction.11 Therefore real-time management of respiratory motion potentially involves the most radiographic exposure of all image-guided radiotherapy procedures. The inse ...
... intensive兲 real-time monitoring is done via dual orthogonal fluoroscopes that continually image the treatment site throughout the fraction.11 Therefore real-time management of respiratory motion potentially involves the most radiographic exposure of all image-guided radiotherapy procedures. The inse ...
OP100 D User and Technical Manual
... Personal radiation monitoring and protective devices are available and recommended for staff members. It is also recommended to provide the patient with a protective apron. Consult the physician before taking images of pregnant patients. ...
... Personal radiation monitoring and protective devices are available and recommended for staff members. It is also recommended to provide the patient with a protective apron. Consult the physician before taking images of pregnant patients. ...
View - OhioLINK ETD
... gantry rotation and the speed of rotation. The number of projections can be fixed or variable. When more projections are collected, better image quality can be obtained at the expense of higher radiation dose and longer reconstruction times. Also more projections lead to an increase in the signal-to ...
... gantry rotation and the speed of rotation. The number of projections can be fixed or variable. When more projections are collected, better image quality can be obtained at the expense of higher radiation dose and longer reconstruction times. Also more projections lead to an increase in the signal-to ...
UNIT 5 biomedical
... Some medical applications of fluoroscopy include: Angiography — used to examine blood vessels in real time Barium enema — a procedure used to examine problems of the colon and lower gastrointestinal area Barium swallow — similar to a barium enema, but used to examine the upper gastroinstestional are ...
... Some medical applications of fluoroscopy include: Angiography — used to examine blood vessels in real time Barium enema — a procedure used to examine problems of the colon and lower gastrointestinal area Barium swallow — similar to a barium enema, but used to examine the upper gastroinstestional are ...
Evaluation of phantoms used in image quality performance testing of
... gantry rotation and the speed of rotation. The number of projections can be fixed or variable. When more projections are collected, better image quality can be obtained at the expense of higher radiation dose and longer reconstruction times. Also more projections lead to an increase in the signal-to ...
... gantry rotation and the speed of rotation. The number of projections can be fixed or variable. When more projections are collected, better image quality can be obtained at the expense of higher radiation dose and longer reconstruction times. Also more projections lead to an increase in the signal-to ...
An experimental approach to Automatic Exposure Control testing
... description of some of the problems that can occur when AEC devices are used incorrectly in the clinical environment. Chapter 3 describes the standard method of testing AEC functionality in a radiographic film environment. It begins with a description of the film characteristic curve in response to ...
... description of some of the problems that can occur when AEC devices are used incorrectly in the clinical environment. Chapter 3 describes the standard method of testing AEC functionality in a radiographic film environment. It begins with a description of the film characteristic curve in response to ...
Volume-of-interest cone-beam CT using a 2.35 MV beam generated
... of a higher efficiency detector for further improvement of contrast-to-noise (CNR) in imaging.6, 9 While the degree of improvement in image quality depends on the beam line and detector designs, we have shown previously, for example, that compared to 6 MV imaging, use of a 3.5 MeV electron beam inci ...
... of a higher efficiency detector for further improvement of contrast-to-noise (CNR) in imaging.6, 9 While the degree of improvement in image quality depends on the beam line and detector designs, we have shown previously, for example, that compared to 6 MV imaging, use of a 3.5 MeV electron beam inci ...
The American College of Radiology, with more than 30,000
... not intended, nor should they be used, to establish a legal standard of care1. For these reasons and those set forth below, the American College of Radiology and our collaborating medical specialty societies caution against the use of these documents in litigation in which the clinical decisions of ...
... not intended, nor should they be used, to establish a legal standard of care1. For these reasons and those set forth below, the American College of Radiology and our collaborating medical specialty societies caution against the use of these documents in litigation in which the clinical decisions of ...
GE_HD_750_ CT 数据手册
... via dynamic in-plane focal spot deflection and independent control of the focal spot size in both X and Z-axis optimizing the focal spot to deliver consistent image quality across the full dynamic range. The X-ray tube’s unique Smart Cathode technology delivers increased power capability for the sma ...
... via dynamic in-plane focal spot deflection and independent control of the focal spot size in both X and Z-axis optimizing the focal spot to deliver consistent image quality across the full dynamic range. The X-ray tube’s unique Smart Cathode technology delivers increased power capability for the sma ...
3. Profile Details - QIBA Wiki
... These conditions also apply to the time of CT follow-up for a previous screen-detected abnormality. If these clinical status conditions cannot be met, such as due to the time-dependent nature of follow-up, the Profile claims may not be valid. Chronic abnormalities such as pulmonary fibrosis also may ...
... These conditions also apply to the time of CT follow-up for a previous screen-detected abnormality. If these clinical status conditions cannot be met, such as due to the time-dependent nature of follow-up, the Profile claims may not be valid. Chronic abnormalities such as pulmonary fibrosis also may ...
A New Approach for the Enhancement of Dual
... 1. Mass attenuation coefficients over CT x-ray energy range. ........................................................... 11 2. Material decomposition of DECT...................................................................................................... 19 3. Typical patterns of DECT images .. ...
... 1. Mass attenuation coefficients over CT x-ray energy range. ........................................................... 11 2. Material decomposition of DECT...................................................................................................... 19 3. Typical patterns of DECT images .. ...
Proton Relaxation Enhancement Associated with Iodinated Contrast
... Index terms: Contrast media, paramagnetic; Contrast media, effects; Magnetic resonance, contrast enhancement; Magnetic resonance, technique AJNR 13:19-27, January/February 1992 ...
... Index terms: Contrast media, paramagnetic; Contrast media, effects; Magnetic resonance, contrast enhancement; Magnetic resonance, technique AJNR 13:19-27, January/February 1992 ...
The Effects of Organ-based Tube Current Modulation on Radiation
... The purpose of this thesis was to quantify dose and noise performance of organ-dosebased tube current modulation (ODM) through experimental studies with an anthropomorphic phantom and simulations with a voxelized phantom library. Tube current modulation is a dose reduction technique that modulates r ...
... The purpose of this thesis was to quantify dose and noise performance of organ-dosebased tube current modulation (ODM) through experimental studies with an anthropomorphic phantom and simulations with a voxelized phantom library. Tube current modulation is a dose reduction technique that modulates r ...
Controlling exposure to ionising radiation in the medical imaging
... ionising radiation for nearly 10 years. After implementing an entirely new set of regulations for radiation protection of patients (2000-2005), it focused its inspection programme in 2007 on the safety of radiotherapy care and then, as of 2008, began to look at interventional radiology and the vario ...
... ionising radiation for nearly 10 years. After implementing an entirely new set of regulations for radiation protection of patients (2000-2005), it focused its inspection programme in 2007 on the safety of radiotherapy care and then, as of 2008, began to look at interventional radiology and the vario ...
DISP-2003: Introduction to Digital Signal Processing
... medicine, all medical imaging requires that the energy used to penetrate the body’s tissues also interact with those tissues. • Absorption, • Attenuation, and • Scattering. Dr. Blanton ...
... medicine, all medical imaging requires that the energy used to penetrate the body’s tissues also interact with those tissues. • Absorption, • Attenuation, and • Scattering. Dr. Blanton ...
Institutionen för medicin och hälsa Department of Medical and Health Sciences
... Magnetic resonance imaging (MRI) is an imaging technique that is used in hospitals worldwide. The images are acquired through the use of an MRI scanner and the clinical information is provided through the image contrast, which is based on the magnetic properties in biological tissue. By altering the ...
... Magnetic resonance imaging (MRI) is an imaging technique that is used in hospitals worldwide. The images are acquired through the use of an MRI scanner and the clinical information is provided through the image contrast, which is based on the magnetic properties in biological tissue. By altering the ...
pdf version
... “Continuing education” means a learning activity that is planned, organized and administered to enhance the professional knowledge and skill underlying professional performance that a holder of a full certificate, radiologist assistant certificate, fusion imaging certificate or certificate of limite ...
... “Continuing education” means a learning activity that is planned, organized and administered to enhance the professional knowledge and skill underlying professional performance that a holder of a full certificate, radiologist assistant certificate, fusion imaging certificate or certificate of limite ...
Acceptance Testing and Quality Control of Photostimulable
... stimulated by additional light energy of the proper wavelength by the process of photostimulated luminescence (PSL). Acquisition and display of the PSP image can be considered in five generalized steps, illustrated in Figure 1. The unexposed PSP detector, commonly known as an imaging plate (IP), is ...
... stimulated by additional light energy of the proper wavelength by the process of photostimulated luminescence (PSL). Acquisition and display of the PSP image can be considered in five generalized steps, illustrated in Figure 1. The unexposed PSP detector, commonly known as an imaging plate (IP), is ...
Easy Quality Control with
... VII. CONSTANCY TESTS - X-RAY EQUIPMENT FOR ANALOGUE MAMMOGRAPHY ACC. TO DIN 68687 AND IEC 61223-2-10 [7, 8] .......................................................................................................................... 41 7.1 TEST PARAMETERS .............................................. ...
... VII. CONSTANCY TESTS - X-RAY EQUIPMENT FOR ANALOGUE MAMMOGRAPHY ACC. TO DIN 68687 AND IEC 61223-2-10 [7, 8] .......................................................................................................................... 41 7.1 TEST PARAMETERS .............................................. ...
Digital Mammography
... Gershon-Cohen; however, it was not until four decades later that the use of x-rays for the diagnosis of breast became more established (Picard, 1998). The modern era of mammography began in the late 1960’s as the technique was refined with dedicated equipment, such as that developed by the physicist ...
... Gershon-Cohen; however, it was not until four decades later that the use of x-rays for the diagnosis of breast became more established (Picard, 1998). The modern era of mammography began in the late 1960’s as the technique was refined with dedicated equipment, such as that developed by the physicist ...
Cone-beam computed tomography with a flat
... 共Received 15 September 1999; accepted for publication 29 March 2000兲 The development and performance of a system for x-ray cone-beam computed tomography 共CBCT兲 using an indirect-detection flat-panel imager 共FPI兲 is presented. Developed as a bench-top prototype for initial investigation of FPI-based ...
... 共Received 15 September 1999; accepted for publication 29 March 2000兲 The development and performance of a system for x-ray cone-beam computed tomography 共CBCT兲 using an indirect-detection flat-panel imager 共FPI兲 is presented. Developed as a bench-top prototype for initial investigation of FPI-based ...
Techniques and Applications of Automatic Tube Current Modulation
... projections). This technique calculates the modulation function (an objective image quality parameter) from the online attenuation profile of the patient. The modulation function data are processed and sent to the generator control for tube current modulation with a delay of 180° from the x-ray gene ...
... projections). This technique calculates the modulation function (an objective image quality parameter) from the online attenuation profile of the patient. The modulation function data are processed and sent to the generator control for tube current modulation with a delay of 180° from the x-ray gene ...
Fluoroscopy
Fluoroscopy /flɔrˈɒskəpi/ is an imaging technique that uses X-rays to obtain real-time moving images of the interior of an object. In its primary application of medical imaging, a fluoroscope /ˈflɔrɵˌskoʊp/ allows a physician to see the internal structure and function of a patient, so that the pumping action of the heart or the motion of swallowing, for example, can be watched. This is useful for both diagnosis and therapy and occurs in general radiology, interventional radiology, and image-guided surgery. In its simplest form, a fluoroscope consists of an X-ray source and a fluorescent screen, between which a patient is placed. However, since the 1950s most fluoroscopes have included X-ray image intensifiers and cameras as well, to improve the image's visibility and make it available on a remote display screen. For many decades fluoroscopy tended to produce live pictures that were not recorded, but since the 1960s, as technology improved, recording and playback became the norm.Fluoroscopy is similar to radiography and X-ray computed tomography (X-ray CT) in that it generates images using X-rays. The original difference was that radiography fixed still images on film whereas fluoroscopy provided live moving pictures that were not stored. However, today radiography, CT, and fluoroscopy are all digital imaging modes with image analysis software and data storage and retrieval. The use of X-rays, a form of ionizing radiation, requires the potential risks from a procedure to be carefully balanced with the benefits of the procedure to the patient. Because the patient must be exposed to a continuous source of x-rays instead of a momentary pulse, a fluoroscopy procedure generally subjects a patient to a higher absorbed dose of radiation than an ordinary (still) radiograph. Much research has been directed toward reducing radiation exposure, and recent advances in fluoroscopy technology such as digital image processing and flat panel detectors, have resulted in much lower radiation doses than former procedures.The type of fluoroscopy used in airport security (to check for hidden weapons or bombs) uses lower doses of radiation than medical fluoroscopy. It was formerly also used in retail stores in the form of shoe-fitting fluoroscopes, but such use was discontinued because it is no longer considered acceptable to use radiation exposure, however small the dose, for nonessential purposes. Only important applications such as health care, bodily safety, food safety, nondestructive testing, and scientific research meet the risk-benefit threshold for use. The reason for higher doses in medical applications is that they are more demanding about tissue contrast, and for the same reason they sometimes require contrast media.