Lecture 10 Mammography Thur - gnssn
... Main variables of the mammographic imaging system • Contrast: capability of the system to make visible small differences in soft tissue density • Sharpness: capability of the system to make visible small details (calcifications down to 0.1 mm) • Dose: the female breast is a very radiosensitive orga ...
... Main variables of the mammographic imaging system • Contrast: capability of the system to make visible small differences in soft tissue density • Sharpness: capability of the system to make visible small details (calcifications down to 0.1 mm) • Dose: the female breast is a very radiosensitive orga ...
Chapter 1 Introduction to Digital Radiography and PACS
... Digital imaging is a broad term. Term was first used medically in 1970s in computed tomography (CT). Digital imaging is defined as any image acquisition process that produces an electronic image that can be viewed and manipulated on a computer. In radiology, images can be sent via computer networks ...
... Digital imaging is a broad term. Term was first used medically in 1970s in computed tomography (CT). Digital imaging is defined as any image acquisition process that produces an electronic image that can be viewed and manipulated on a computer. In radiology, images can be sent via computer networks ...
UTERUS CONTRAST ENHANCEMENT PATTERNS AT CT AND MR
... As the uterine body, the CT contrast enhancement patterns of the uterine cervix are identical to those seen on MRI. A stratified enhancement pattern of the cervix layers is observed in the uterine body enhancement patterns 1 and 2 at CT, but not in type 3 pattern2. The cervix stratified enhancement ...
... As the uterine body, the CT contrast enhancement patterns of the uterine cervix are identical to those seen on MRI. A stratified enhancement pattern of the cervix layers is observed in the uterine body enhancement patterns 1 and 2 at CT, but not in type 3 pattern2. The cervix stratified enhancement ...
Respiratory Motion Correction in Positron Emission Tomography
... of image quality introduced by respiratory motion in positron emission tomography (PET), so that diagnostic performance for lung cancer can be improved. Lung cancer is currently the most common cause of cancer death both in the UK and in the world. PET/CT, which is a combination of PET and CT, provi ...
... of image quality introduced by respiratory motion in positron emission tomography (PET), so that diagnostic performance for lung cancer can be improved. Lung cancer is currently the most common cause of cancer death both in the UK and in the world. PET/CT, which is a combination of PET and CT, provi ...
Subperiosteal ganglion cyst of the tibia
... joint but a delay of one to two hours after intra-articular injection may be necessary to demonstrate such a communication. On CT images, ganglion cysts usually appear to be hypodense with respect to muscle. Typically, contrast enhancement is absent, although slight enhancement of the ...
... joint but a delay of one to two hours after intra-articular injection may be necessary to demonstrate such a communication. On CT images, ganglion cysts usually appear to be hypodense with respect to muscle. Typically, contrast enhancement is absent, although slight enhancement of the ...
Coronary CT angiography: Diagnostic value and clinical challenges
... reduction capabilities, including a dynamic helical collimator and an adaptive axial collimator to reduce z-over scanning[34,35]. Second generation of 128-slice CT was introduced with dual-source which uses two x-ray tubes with opposing 64 detector arrays mounted 90° from each other. The main advant ...
... reduction capabilities, including a dynamic helical collimator and an adaptive axial collimator to reduce z-over scanning[34,35]. Second generation of 128-slice CT was introduced with dual-source which uses two x-ray tubes with opposing 64 detector arrays mounted 90° from each other. The main advant ...
- Wiley Online Library
... A. Image-based synchronization method We present an image-based method for the temporal synchronization of CBCT and optical surface acquisitions, which can be generalized both to marker-based and markerless surface tracking systems. The proposed synchronization approach does not require any additi ...
... A. Image-based synchronization method We present an image-based method for the temporal synchronization of CBCT and optical surface acquisitions, which can be generalized both to marker-based and markerless surface tracking systems. The proposed synchronization approach does not require any additi ...
Review of transmission scanning configurations in cardiac SPECT
... organ, the central structures show artificially decreased radioactivity than the outer contour and therefore they seem dark (see Figure 2-A) [6]. In medical imaging, the artifacts created by attenuation may be confused with true lesions. Therefore, the use of the attenuation correction methods is ne ...
... organ, the central structures show artificially decreased radioactivity than the outer contour and therefore they seem dark (see Figure 2-A) [6]. In medical imaging, the artifacts created by attenuation may be confused with true lesions. Therefore, the use of the attenuation correction methods is ne ...
PDF of this page
... Detailed study of gross anatomical structures will be conducted systematically for location, relationship to other structures, function, and common pathologic conditions. Anatomical structures are located and identified in axial (transverse), sagittal, coronal, and orthogonal (oblique) planes with a ...
... Detailed study of gross anatomical structures will be conducted systematically for location, relationship to other structures, function, and common pathologic conditions. Anatomical structures are located and identified in axial (transverse), sagittal, coronal, and orthogonal (oblique) planes with a ...
Computed Tomography - Florida Administrative Code
... certification for individuals in addition to an overview of the specific practice. Scope of Practice. The scope of practice delineates the parameters of the specific practice. Clinical Performance Standards. The clinical performance standards define the activities of the individual in the care of pa ...
... certification for individuals in addition to an overview of the specific practice. Scope of Practice. The scope of practice delineates the parameters of the specific practice. Clinical Performance Standards. The clinical performance standards define the activities of the individual in the care of pa ...
Four Slice CT Scanner Comparison Report
... there is considerable of difference between the two. In particular, the current Asteion has a lower specification tube and generator, and a slower scan speed. In its current form it has poorer dosimetric performance than the Aquilion for equivalent image quality. Toshiba stated that they would upgra ...
... there is considerable of difference between the two. In particular, the current Asteion has a lower specification tube and generator, and a slower scan speed. In its current form it has poorer dosimetric performance than the Aquilion for equivalent image quality. Toshiba stated that they would upgra ...
CURRICULUM VITAE - McGovern Medical School
... Thoracic Tumor Board, monthly meeting with medical oncology, radiation oncology, thoracic surgery, thoracic radiology, and pathology, 2011 to present. ...
... Thoracic Tumor Board, monthly meeting with medical oncology, radiation oncology, thoracic surgery, thoracic radiology, and pathology, 2011 to present. ...
Integrated PET/CT in the staging of nonsmall cell lung cancer: technical
... ABSTRACT: Lung cancer is a common disease and is a leading cause of death in many countries. The management of lung cancer is directed by an optimal staging of the tumour. Integrated positron emission tomography (PET)/computed tomography (CT) is an anatomo-metabolic imaging modality that has recentl ...
... ABSTRACT: Lung cancer is a common disease and is a leading cause of death in many countries. The management of lung cancer is directed by an optimal staging of the tumour. Integrated positron emission tomography (PET)/computed tomography (CT) is an anatomo-metabolic imaging modality that has recentl ...
Digital Breast Tomosynthesis
... Digital breast tomosynthesis (DBT) uses a modified DM unit which can produce 3D images. 23 DBT uses conventional x-rays and a digital detector to create cross-sectional images or ‘slices’ of a volume of tissue. 24 The slices are typically thin which largely eliminates the issue of overlapping tissue ...
... Digital breast tomosynthesis (DBT) uses a modified DM unit which can produce 3D images. 23 DBT uses conventional x-rays and a digital detector to create cross-sectional images or ‘slices’ of a volume of tissue. 24 The slices are typically thin which largely eliminates the issue of overlapping tissue ...
An Exposure Indicator for Digital Radiography Report of AAPM Task
... Digital radiographic imaging systems, such as those using photostimulable storage phosphor (PSP), amorphous selenium, amorphous silicon, charge-coupled device (CCD), and metal oxide semiconductor-field effect transistor (MOSFET) technology, can produce adequate image quality over a much broader rang ...
... Digital radiographic imaging systems, such as those using photostimulable storage phosphor (PSP), amorphous selenium, amorphous silicon, charge-coupled device (CCD), and metal oxide semiconductor-field effect transistor (MOSFET) technology, can produce adequate image quality over a much broader rang ...
10. Organization of a Paediatric Radiology Department - RPOP
... 2. False - Parents and family members should comfort the child and they should be given clear instructions and personal protective devices. 3. False - There are different types of shielding devices for males and females gonads and they should be available in various sizes. 4. False - They should be ...
... 2. False - Parents and family members should comfort the child and they should be given clear instructions and personal protective devices. 3. False - There are different types of shielding devices for males and females gonads and they should be available in various sizes. 4. False - They should be ...
X-ray-based attenuation correction for positron emission
... The process of generating a patient-specific attenuation map begins with the acquisition of transmission data by using an external source of radiation. The imaging geometry is illustrated in Fig 5 in which radiation from an external source with an incident intensity of Io is transmitted through an o ...
... The process of generating a patient-specific attenuation map begins with the acquisition of transmission data by using an external source of radiation. The imaging geometry is illustrated in Fig 5 in which radiation from an external source with an incident intensity of Io is transmitted through an o ...
Dural Sinus Thrombosis: Sources of Error in Image Interpretation
... (Fig. 8). An occipital sinus has been reported to be present in 10% of normal brains on MR venography [19] (Fig. 8). Correlation with osseous anatomy on available CT images may be helpful in cases of asymmetric venous sinus caliber because congenitally small transverse or sigmoid sinuses would be ex ...
... (Fig. 8). An occipital sinus has been reported to be present in 10% of normal brains on MR venography [19] (Fig. 8). Correlation with osseous anatomy on available CT images may be helpful in cases of asymmetric venous sinus caliber because congenitally small transverse or sigmoid sinuses would be ex ...
Flash speed. Lowest dose. - VCU Department of Radiology
... rates. For routine cases, however, the dose required in less than ideal circumstances is significantly higher than cardiac cath, that normally requires at least 5 mSv for pure diagnostic procedures. Therefore, cardiac CT has been difficult to justify, especially for younger patients and females. Sie ...
... rates. For routine cases, however, the dose required in less than ideal circumstances is significantly higher than cardiac cath, that normally requires at least 5 mSv for pure diagnostic procedures. Therefore, cardiac CT has been difficult to justify, especially for younger patients and females. Sie ...
Evidence Table - American College of Radiology
... Contrast-enhanced FIESTA and CE-MRA displayed CNIX in 90% and 100% of cases, respectively, CNX in 94% and 100%, and spCNXI in 51% and 0% of cases. The superior ganglion of CNIX was discernible in 89.8% and 87.8%; the inferior ganglion of CNIX, in 73% and 100%; and the superior ganglion of CNX, in 98 ...
... Contrast-enhanced FIESTA and CE-MRA displayed CNIX in 90% and 100% of cases, respectively, CNX in 94% and 100%, and spCNXI in 51% and 0% of cases. The superior ganglion of CNIX was discernible in 89.8% and 87.8%; the inferior ganglion of CNIX, in 73% and 100%; and the superior ganglion of CNX, in 98 ...
Contemporary Reviews in Cardiovascular Medicine
... Color Doppler Imaging Color Doppler is widely used to screen for the presence of MR. Although the term color flow imaging is often used, a color Doppler image does not depict flow at all but rather the spatial distribution of velocities within the imaging plane. The image can be profoundly affected ...
... Color Doppler Imaging Color Doppler is widely used to screen for the presence of MR. Although the term color flow imaging is often used, a color Doppler image does not depict flow at all but rather the spatial distribution of velocities within the imaging plane. The image can be profoundly affected ...
Calibration of a mobile-gantry computed tomography scanner for surgical navigation Anna Belkova
... position sensor. These values are comparable to the best reported results of the last two decades of work in image-guided surgery. Critically important coordinate frames for the CT imaging modality were determined using DICOM header data of the CT image acquired. In this dissertation, the DICOM head ...
... position sensor. These values are comparable to the best reported results of the last two decades of work in image-guided surgery. Critically important coordinate frames for the CT imaging modality were determined using DICOM header data of the CT image acquired. In this dissertation, the DICOM head ...
3D Medical Image Reconstruction - Estudo Geral
... asymptomatic at earlier stages, but it has a high survival rate at the earliest stages. These characteristics make the screening and the accurate diagnostic important issues. With the aim of reduce the damage caused by breast diseases, new image techniques have arisen and the current techniques are ...
... asymptomatic at earlier stages, but it has a high survival rate at the earliest stages. These characteristics make the screening and the accurate diagnostic important issues. With the aim of reduce the damage caused by breast diseases, new image techniques have arisen and the current techniques are ...
Radiation Dose and Safety: Informatics Standards and Tools
... can potentially obviate the damage caused by previous events; at low levels of radiation exposure (typical of most diagnostic imaging procedures), demonstrating any deleterious impact or increase of risk, or a range of other biological, physical, societal, and political effects, is extremely difficul ...
... can potentially obviate the damage caused by previous events; at low levels of radiation exposure (typical of most diagnostic imaging procedures), demonstrating any deleterious impact or increase of risk, or a range of other biological, physical, societal, and political effects, is extremely difficul ...
Features of Focal Nodular Hyperplasia on Multiple Imaging Modalities
... • Dr. Gillian Lieberman ...
... • Dr. Gillian Lieberman ...
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.