PET Scan Primer - Cancer Care Ontario
... (PET) is a nuclear medicine technology. The PET scanner is a large machine with a round, doughnut shaped hole in the middle, similar to a CT unit. The scanner has multiple rings of detectors that measure the absorption of the radiopharmaceutical in a person’s body. The scanner produces an image base ...
... (PET) is a nuclear medicine technology. The PET scanner is a large machine with a round, doughnut shaped hole in the middle, similar to a CT unit. The scanner has multiple rings of detectors that measure the absorption of the radiopharmaceutical in a person’s body. The scanner produces an image base ...
ASE/SCA Recommendations and Guidelines for Continuous Quality
... stress echocardiography (23), echocardiography for pediatric patients (1), and echocardiography using handcarried ultrasound devices (22) have been previously detailed. Since TEE is the dominant perioperative procedure, the remainder of this document will focus on the use of TEE. TEE evaluation of t ...
... stress echocardiography (23), echocardiography for pediatric patients (1), and echocardiography using handcarried ultrasound devices (22) have been previously detailed. Since TEE is the dominant perioperative procedure, the remainder of this document will focus on the use of TEE. TEE evaluation of t ...
Ultrasound of the liver
... The liver is a large, pyramidal shaped organ and liver sectional anatomy may be best described imaged and defined using by real time ultrasound imaging. Conventional real time ultrasound produces images of thin slices of the liver on the screen, and so it is essential that the operator scans the ent ...
... The liver is a large, pyramidal shaped organ and liver sectional anatomy may be best described imaged and defined using by real time ultrasound imaging. Conventional real time ultrasound produces images of thin slices of the liver on the screen, and so it is essential that the operator scans the ent ...
Rigid and Non-Rigid Surface Registration in Medicine
... touch-less user interaction in sterile environments, and for application in early diagnosis and elderly care, among others. This thesis is concerned with the application of range imaging technologies in computer-assisted and image-guided interventions, where the geometric alignment of range imaging ...
... touch-less user interaction in sterile environments, and for application in early diagnosis and elderly care, among others. This thesis is concerned with the application of range imaging technologies in computer-assisted and image-guided interventions, where the geometric alignment of range imaging ...
Common and Rare Variants of the Biliary Tree: Magnetic
... proper biliary reconstruction, if this biliary anomaly is not well recognized preoperatively. Further, for those with Yoshida classification 4 who undergo laparoscopic cholecystectomy, the right posterior segmental branch might be mistaken as cystic duct and erroneously divided. Of note, the type 3 ...
... proper biliary reconstruction, if this biliary anomaly is not well recognized preoperatively. Further, for those with Yoshida classification 4 who undergo laparoscopic cholecystectomy, the right posterior segmental branch might be mistaken as cystic duct and erroneously divided. Of note, the type 3 ...
American Society of Echocardiography/ Society of Cardiovascular
... operating room, recovery room, intensive care unit, and echocardiography laboratory. The various modalities that comprise perioperative echocardiography include M-mode and 2- and 3-dimensional imaging and pulsed wave, continuous wave, color flow, and tissue Doppler. The echocardiographic data are ob ...
... operating room, recovery room, intensive care unit, and echocardiography laboratory. The various modalities that comprise perioperative echocardiography include M-mode and 2- and 3-dimensional imaging and pulsed wave, continuous wave, color flow, and tissue Doppler. The echocardiographic data are ob ...
KODAK DIRECTVIEW CR Mammography Feature User`s Guide
... The KODAK DIRECTVIEW CR System with CR Mammography Feature, using CR Mammography Cassettes, provides the means to capture and process mammography images. Insert the CR Mammography Cassettes in the Mammography X-ray Unit's cassette holder for exposure, then place them in the KODAK DIRECTVIEW CR Syste ...
... The KODAK DIRECTVIEW CR System with CR Mammography Feature, using CR Mammography Cassettes, provides the means to capture and process mammography images. Insert the CR Mammography Cassettes in the Mammography X-ray Unit's cassette holder for exposure, then place them in the KODAK DIRECTVIEW CR Syste ...
medical physics international
... Veale (Guy’s Hospital, London, UK) at an HPA meeting in October 1954. This proposal was discussed at a meeting of Swedish medical physicists in December 1955 and, in September 1956, a written proposal to this effect was sent by Walter Moos (University of Illinois, Chicago, USA) to medical physicists ...
... Veale (Guy’s Hospital, London, UK) at an HPA meeting in October 1954. This proposal was discussed at a meeting of Swedish medical physicists in December 1955 and, in September 1956, a written proposal to this effect was sent by Walter Moos (University of Illinois, Chicago, USA) to medical physicists ...
Assessment of Coronary Arteries with Total Study Time of Less than
... MR angiography, however, remains time consuming because only a limited portion of the coronary artery tree is imaged for each targeted double-oblique 3D volume acquisition, necessitating the acquisition of repeated 3D images to cover all the coronary arteries. Whole-heart coronary MR angiography wit ...
... MR angiography, however, remains time consuming because only a limited portion of the coronary artery tree is imaged for each targeted double-oblique 3D volume acquisition, necessitating the acquisition of repeated 3D images to cover all the coronary arteries. Whole-heart coronary MR angiography wit ...
dual energy computed tomography for proton therapy treatment
... The uncertainties in SPRs estimated using the kV-MV DECT were analyzed further and compared to those using the stoichiometric method. The uncertainties in SPR estimation can be divided into five categories according to their origins: the inherent uncertainty, the DECT modeling uncertainty, the CT im ...
... The uncertainties in SPRs estimated using the kV-MV DECT were analyzed further and compared to those using the stoichiometric method. The uncertainties in SPR estimation can be divided into five categories according to their origins: the inherent uncertainty, the DECT modeling uncertainty, the CT im ...
20 CT Angiography of the Thoracic Aorta
... portion of the scan in this setting. Additionally, when assessing stent grafts, 5-mm-thick unenhanced sections can be useful for mapping the location of calcifications around the stent graft, which can subsequently mimic an endoleak following contrast administration. Because these initial unenhanced ...
... portion of the scan in this setting. Additionally, when assessing stent grafts, 5-mm-thick unenhanced sections can be useful for mapping the location of calcifications around the stent graft, which can subsequently mimic an endoleak following contrast administration. Because these initial unenhanced ...
Angio CT assessment of anatomical variants in renal vasculature: its
... factor for graft survival [1]. This fact allows not only for better graft endurance but also superior recipient survival compared to transplantation with a cadaveric donor. There is a reduced incidence of rejection and therefore less need for immunosuppressive drugs. As a consequence, not only more ...
... factor for graft survival [1]. This fact allows not only for better graft endurance but also superior recipient survival compared to transplantation with a cadaveric donor. There is a reduced incidence of rejection and therefore less need for immunosuppressive drugs. As a consequence, not only more ...
American Society of Echocardiography Recommendations for Use
... selected structures such as the left atrial (LA) appendage, pulmonary veins, and mitral regurgitant jets in patients with prosthetic mitral valves. However, TEE may be of limited utility in clinical trials because of its semi-invasive nature and added requirements for equipment and personnel. Noneth ...
... selected structures such as the left atrial (LA) appendage, pulmonary veins, and mitral regurgitant jets in patients with prosthetic mitral valves. However, TEE may be of limited utility in clinical trials because of its semi-invasive nature and added requirements for equipment and personnel. Noneth ...
Use of Ultrasound to Guide Vascular Access Procedures
... The contents of this parameter were developed collaboratively among the AIUM and other organizations whose members use ultrasound for guidance in vascular access procedures.† This parameter has been developed by and for clinicians from diverse specialties and practitioner levels who perform vascular ...
... The contents of this parameter were developed collaboratively among the AIUM and other organizations whose members use ultrasound for guidance in vascular access procedures.† This parameter has been developed by and for clinicians from diverse specialties and practitioner levels who perform vascular ...
High-Resolution CT of the Lung: Patterns of Disease and Differential
... Dynamic expiratory HRCT is performed by imaging the patient during a forced vital capacity maneuver, using either a spiral CT scanner or an electron-beam CT scanner [17 – 19]. Dynamic expiratory HRCT is also performed easily with MSCT scanners. Images are acquired at user-selected levels with imagin ...
... Dynamic expiratory HRCT is performed by imaging the patient during a forced vital capacity maneuver, using either a spiral CT scanner or an electron-beam CT scanner [17 – 19]. Dynamic expiratory HRCT is also performed easily with MSCT scanners. Images are acquired at user-selected levels with imagin ...
Conventional Radiography of the Shoulder
... scheme as a means of describing proximal humeral fractures and predicting clinical outcomes.20 The system uses the four components of the humeral head, which include the anatomic neck, surgical neck, greater tuberosity, and lesser tuberosity (Fig. 5). To be considered significantly displaced, a frac ...
... scheme as a means of describing proximal humeral fractures and predicting clinical outcomes.20 The system uses the four components of the humeral head, which include the anatomic neck, surgical neck, greater tuberosity, and lesser tuberosity (Fig. 5). To be considered significantly displaced, a frac ...
Microsoft PowerPoint - Breast Density
... Area assessment says either 0 or 100% dense tissue between that pixel and the x-ray source. Volumetric assessment gives a continuous range between 0-100%. With Area, effectively you do a volumetric assessment by eye then threshold it to say “this is dense tissue”., that thresholding does not occur w ...
... Area assessment says either 0 or 100% dense tissue between that pixel and the x-ray source. Volumetric assessment gives a continuous range between 0-100%. With Area, effectively you do a volumetric assessment by eye then threshold it to say “this is dense tissue”., that thresholding does not occur w ...
Scatter Compensation Techniques in PET
... PET imaging. It is well established that scatter correction improves the contrast compared with no correction but does so at the expense of decreased signal-to-noise ratio when subtraction-based scatter-correction techniques are used [26]. Scatter compensation improves the contrast between the diffe ...
... PET imaging. It is well established that scatter correction improves the contrast compared with no correction but does so at the expense of decreased signal-to-noise ratio when subtraction-based scatter-correction techniques are used [26]. Scatter compensation improves the contrast between the diffe ...
19 2D and 3D Planning in Brachytherapy
... Here the target and organ at risk localization as well as the catheter reconstruction are based on 3D methods using modern imaging modalities. The same is valid for the dose calculation and evaluation. A common procedure, at least in the past for gynaecological and other intracavitary applications, ...
... Here the target and organ at risk localization as well as the catheter reconstruction are based on 3D methods using modern imaging modalities. The same is valid for the dose calculation and evaluation. A common procedure, at least in the past for gynaecological and other intracavitary applications, ...
Cone Beam Ct for Dental and Maxillofacial Radiology
... the Computed Tomography (CT), which is today a well-established diagnostic tool in many areas of medicine. New applications of CT, sometimes in areas where they were hardly expected, are still coming into existence today. One example of such innovative use of CT is the development of the Cone Beam C ...
... the Computed Tomography (CT), which is today a well-established diagnostic tool in many areas of medicine. New applications of CT, sometimes in areas where they were hardly expected, are still coming into existence today. One example of such innovative use of CT is the development of the Cone Beam C ...
Myocardial Structural Associations With Local Electrograms A Study
... structural heart disease.9,10 In addition, scar transmurality, defined as the ratio of postinfarct scar thickness (PI-ST) to left ventricular wall thickness (LV-WT), has been associated with EGM characteristics on EAM.11–19 Local EGMs reflect the characteristics of scar, as well as total myocardium ...
... structural heart disease.9,10 In addition, scar transmurality, defined as the ratio of postinfarct scar thickness (PI-ST) to left ventricular wall thickness (LV-WT), has been associated with EGM characteristics on EAM.11–19 Local EGMs reflect the characteristics of scar, as well as total myocardium ...
code of safe practice for the use of
... aprons and leaded gloves shall always be available with mobile and portable x-ray machines in case patients are required to be held in position during radiography, or other persons are required to assist in any way. Fluoroscopy 3.13 Personnel required to be in close proximity to the patient during f ...
... aprons and leaded gloves shall always be available with mobile and portable x-ray machines in case patients are required to be held in position during radiography, or other persons are required to assist in any way. Fluoroscopy 3.13 Personnel required to be in close proximity to the patient during f ...
Chapter 5 Cassette-based Image Acquisition
... 120. It is not recommended that kilovoltage peak values less than 45 or greater than 120 be used because those values may be inconsistent and may produce too little or too much excitation of the phosphors. The k-edge of phosphor imaging plates ranges from 30 to 50 keV so that exposure ranges of 60 t ...
... 120. It is not recommended that kilovoltage peak values less than 45 or greater than 120 be used because those values may be inconsistent and may produce too little or too much excitation of the phosphors. The k-edge of phosphor imaging plates ranges from 30 to 50 keV so that exposure ranges of 60 t ...
CT Scanning and Dental Implant
... Fig. 6. Cone-shaped x-ray beam centered on an x-ray area detector The amount of radiation absorbed by the patient for each scan is reportedly 0.62 mGy.Utilization of CBCT clearly illustrates the true 3-D shape and size of all anatomical structures. By combining CBCT and 3-D treatment planning, impla ...
... Fig. 6. Cone-shaped x-ray beam centered on an x-ray area detector The amount of radiation absorbed by the patient for each scan is reportedly 0.62 mGy.Utilization of CBCT clearly illustrates the true 3-D shape and size of all anatomical structures. By combining CBCT and 3-D treatment planning, impla ...
Gadolinium-enhanced magnetic resonance angiography in renal
... grading of RAS by combining 3D contrast-enhanced MRA and phase-contrast flow measurements.18 Magnetic resonance renography, which is being intensively evaluated at the moment, makes use of the combined administration of gadolinium chelates and an angiotensin-converting enzyme inhibitor such as capto ...
... grading of RAS by combining 3D contrast-enhanced MRA and phase-contrast flow measurements.18 Magnetic resonance renography, which is being intensively evaluated at the moment, makes use of the combined administration of gadolinium chelates and an angiotensin-converting enzyme inhibitor such as capto ...
Medical imaging
Medical imaging is the technique and process of creating visual representations of the interior of a body for clinical analysis and medical intervention. Medical imaging seeks to reveal internal structures hidden by the skin and bones, as well as to diagnose and treat disease. Medical imaging also establishes a database of normal anatomy and physiology to make it possible to identify abnormalities. Although imaging of removed organs and tissues can be performed for medical reasons, such procedures are usually considered part of pathology instead of medical imaging.As a discipline and in its widest sense, it is part of biological imaging and incorporates radiology which uses the imaging technologies of X-ray radiography, magnetic resonance imaging, medical ultrasonography or ultrasound, endoscopy, elastography, tactile imaging, thermography, medical photography and nuclear medicine functional imaging techniques as positron emission tomography.Measurement and recording techniques which are not primarily designed to produce images, such as electroencephalography (EEG), magnetoencephalography (MEG), electrocardiography (ECG), and others represent other technologies which produce data susceptible to representation as a parameter graph vs. time or maps which contain information about the measurement locations. In a limited comparison these technologies can be considered as forms of medical imaging in another discipline.Up until 2010, 5 billion medical imaging studies had been conducted worldwide. Radiation exposure from medical imaging in 2006 made up about 50% of total ionizing radiation exposure in the United States.In the clinical context, ""invisible light"" medical imaging is generally equated to radiology or ""clinical imaging"" and the medical practitioner responsible for interpreting (and sometimes acquiring) the images is a radiologist. ""Visible light"" medical imaging involves digital video or still pictures that can be seen without special equipment. Dermatology and wound care are two modalities that use visible light imagery. Diagnostic radiography designates the technical aspects of medical imaging and in particular the acquisition of medical images. The radiographer or radiologic technologist is usually responsible for acquiring medical images of diagnostic quality, although some radiological interventions are performed by radiologists.As a field of scientific investigation, medical imaging constitutes a sub-discipline of biomedical engineering, medical physics or medicine depending on the context: Research and development in the area of instrumentation, image acquisition (e.g. radiography), modeling and quantification are usually the preserve of biomedical engineering, medical physics, and computer science; Research into the application and interpretation of medical images is usually the preserve of radiology and the medical sub-discipline relevant to medical condition or area of medical science (neuroscience, cardiology, psychiatry, psychology, etc.) under investigation. Many of the techniques developed for medical imaging also have scientific and industrial applications.Medical imaging is often perceived to designate the set of techniques that noninvasively produce images of the internal aspect of the body. In this restricted sense, medical imaging can be seen as the solution of mathematical inverse problems. This means that cause (the properties of living tissue) is inferred from effect (the observed signal). In the case of medical ultrasonography, the probe consists of ultrasonic pressure waves and echoes that go inside the tissue to show the internal structure. In the case of projectional radiography, the probe uses X-ray radiation, which is absorbed at different rates by different tissue types such as bone, muscle and fat.The term noninvasive is used to denote a procedure where no instrument is introduced into a patient's body which is the case for most imaging techniques used.