Features of Focal Nodular Hyperplasia on Multiple Imaging Modalities
... • Dr. Gillian Lieberman ...
... • Dr. Gillian Lieberman ...
Anniversary Paper: Development of x
... the differences between the polychromatic spectra obtained when the tube is run at two different kVp could be used to develop dual-energy techniques that allow one to extract effective atomic number and electron density information.19,32 The noise properties of the dual-energy technique were studied ...
... the differences between the polychromatic spectra obtained when the tube is run at two different kVp could be used to develop dual-energy techniques that allow one to extract effective atomic number and electron density information.19,32 The noise properties of the dual-energy technique were studied ...
(a) analytic linogram and (b) - Repositório da Universidade Nova de
... This work was carried out at Instituto de Biofísica e Engenharia Biomédica da Faculdade de Ciências da Universidade de Lisboa (IBEB). I would like to express my sincere gratitude to those who have supported me and contributed to this thesis. First and foremost, I would like to thank my advisor, Prof ...
... This work was carried out at Instituto de Biofísica e Engenharia Biomédica da Faculdade de Ciências da Universidade de Lisboa (IBEB). I would like to express my sincere gratitude to those who have supported me and contributed to this thesis. First and foremost, I would like to thank my advisor, Prof ...
EANM guidelines for ventilation / perfusion scintigraphy – Part 1
... with imaging techniques, which in practice is performed using ventilation/perfusion scintigraphy (V/PSCAN) or multidetector computed tomography of the pulmonary arteries (MDCT). The epidemiology, natural history, pathophysiology and clinical presentation of PE are briefly reviewed. The primary objec ...
... with imaging techniques, which in practice is performed using ventilation/perfusion scintigraphy (V/PSCAN) or multidetector computed tomography of the pulmonary arteries (MDCT). The epidemiology, natural history, pathophysiology and clinical presentation of PE are briefly reviewed. The primary objec ...
Magnetic Resonance Lymphangiography for the Study of Lymphatic
... Contrast-enhanced 3D MRL not only demonstrated the lymphatic vessels and lymph nodes, but also identified extralymphatic abnormalities such as the location of edema and other pathological changes resulting from stagnant lymph such as fat deposition and tissue fibrosis, and was also able to differentia ...
... Contrast-enhanced 3D MRL not only demonstrated the lymphatic vessels and lymph nodes, but also identified extralymphatic abnormalities such as the location of edema and other pathological changes resulting from stagnant lymph such as fat deposition and tissue fibrosis, and was also able to differentia ...
Nuclear Medicine in Musculoskeletal Disorders
... Nuclear medicine supplies with functional perspective in the diagnosis of different pathologies of the musculoskeletal system. Bone scintigraphy is one of the most used nuclear medicine techniques in our clinical practice for location, evaluation and diagnosis of these pathologies because of its hig ...
... Nuclear medicine supplies with functional perspective in the diagnosis of different pathologies of the musculoskeletal system. Bone scintigraphy is one of the most used nuclear medicine techniques in our clinical practice for location, evaluation and diagnosis of these pathologies because of its hig ...
GE_HD_750_ CT 数据手册
... The Power to Perform: Performix? HD X-Ray Tube enables improved spatial resolution 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 tub ...
... The Power to Perform: Performix? HD X-Ray Tube enables improved spatial resolution 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 tub ...
Characterization of the homogeneous tissue mixture approximation
... to physicians during discussions with patients about mammographic screening.24–28 In addition, the use of the homogeneous breast approximation might also not be appropriate for comparative studies of certain characteristics, e.g., in which the x-ray energy used by two modalities being compared diffe ...
... to physicians during discussions with patients about mammographic screening.24–28 In addition, the use of the homogeneous breast approximation might also not be appropriate for comparative studies of certain characteristics, e.g., in which the x-ray energy used by two modalities being compared diffe ...
Cross Sectional Imaging Nuclear Medicine
... Cross Sectional Imaging • No superimposition of structures • Excellent contrast resolution – can see the difference between 2 similar tissues • For CT – scan can be performed in one plane (usually transverse) and reformatted in the others (sag, dorsal) • CT – good for bone and soft tissue • MRI – b ...
... Cross Sectional Imaging • No superimposition of structures • Excellent contrast resolution – can see the difference between 2 similar tissues • For CT – scan can be performed in one plane (usually transverse) and reformatted in the others (sag, dorsal) • CT – good for bone and soft tissue • MRI – b ...
Detection of Coronary Artery Stenoses by Contrast
... permits coronary artery visualization. We investigated the method’s ability to identify high-grade coronary artery stenoses and occlusions. Methods and Results—A total of 64 consecutive patients were studied by MSCT (4⫻1 mm cross-sections, 500-ms rotation, table feed 1.5 mm/rotation, intravenous con ...
... permits coronary artery visualization. We investigated the method’s ability to identify high-grade coronary artery stenoses and occlusions. Methods and Results—A total of 64 consecutive patients were studied by MSCT (4⫻1 mm cross-sections, 500-ms rotation, table feed 1.5 mm/rotation, intravenous con ...
Feasibility of contrast agent volume reduction on 640
... Methods and Materials A total of 105 subjects with low heart rate (# 65 beats/min) and suspected coronary artery disease were randomly divided into three groups with 35 subjects in each group. The patients in Groups A, B and C were injected with a volume of 0.8, 0.7, and 0.6 ml/kg of contrast agent, ...
... Methods and Materials A total of 105 subjects with low heart rate (# 65 beats/min) and suspected coronary artery disease were randomly divided into three groups with 35 subjects in each group. The patients in Groups A, B and C were injected with a volume of 0.8, 0.7, and 0.6 ml/kg of contrast agent, ...
Chapter 11: Computed Tomography - Human Health Campus
... Clinical Computed Tomography (CT) was introduced in 1971 - limited to axial imaging of the brain in neuroradiology It developed into a versatile 3D whole body imaging modality for a wide range of applications in for example • oncology, vascular radiology, cardiology, traumatology and interventional ...
... Clinical Computed Tomography (CT) was introduced in 1971 - limited to axial imaging of the brain in neuroradiology It developed into a versatile 3D whole body imaging modality for a wide range of applications in for example • oncology, vascular radiology, cardiology, traumatology and interventional ...
Acceptance Testing and Quality Control of Photostimulable
... The primary purpose of this document is to guide the clinical medical physicist in the acceptance testing of photostimulable phosphor (PSP) imaging systems. PSP imaging devices (modalities) are known by a number of names including (most commonly) computed radiography (CR), storage phosphor imaging, ...
... The primary purpose of this document is to guide the clinical medical physicist in the acceptance testing of photostimulable phosphor (PSP) imaging systems. PSP imaging devices (modalities) are known by a number of names including (most commonly) computed radiography (CR), storage phosphor imaging, ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... Inflammatory hyperplasia originating in the superficial PDL is considered to be a factor in the histogenesis of the POF.10 The peak incidence of POF is between the second and third decades. Women are more likely to be affected than men.10, 12, 13 Clinically, the POF presents as an exophytic, smooth- ...
... Inflammatory hyperplasia originating in the superficial PDL is considered to be a factor in the histogenesis of the POF.10 The peak incidence of POF is between the second and third decades. Women are more likely to be affected than men.10, 12, 13 Clinically, the POF presents as an exophytic, smooth- ...
NIH Public Access - Questions and Answers in MRI
... between bellows and diaphragmatic motion (7-9). Bellows gating has attractive qualities. It provides a continuous signal which does not disrupt imaging, in stark contrast to NAVgating and even most self-gating methods. This may prove useful, e.g. for cine imaging or to restrict imaging based on crit ...
... between bellows and diaphragmatic motion (7-9). Bellows gating has attractive qualities. It provides a continuous signal which does not disrupt imaging, in stark contrast to NAVgating and even most self-gating methods. This may prove useful, e.g. for cine imaging or to restrict imaging based on crit ...
Table 1
... sensitive for the diagnosis of CAD (11,13,14,17–19). However, data supporting the prognostic value of 82Rb PET MPI are limited (20). The primary goal of the current study was to evaluate the prognostic value of 82Rb PET imaging for the prediction of cardiac events. Although SPECT MPI is a highly use ...
... sensitive for the diagnosis of CAD (11,13,14,17–19). However, data supporting the prognostic value of 82Rb PET MPI are limited (20). The primary goal of the current study was to evaluate the prognostic value of 82Rb PET imaging for the prediction of cardiac events. Although SPECT MPI is a highly use ...
Normal Sagittal and Coronal Suture Widths by Using CT Imaging
... should be noted. First, premature infants may have been included in the sample population. The data base query yielded results based upon patient age but did not take into consideration the gestational age of the infant at the time of birth. Although we excluded all known premature infants, the prem ...
... should be noted. First, premature infants may have been included in the sample population. The data base query yielded results based upon patient age but did not take into consideration the gestational age of the infant at the time of birth. Although we excluded all known premature infants, the prem ...
Normal Sagittal and Coronal Suture Widths
... should be noted. First, premature infants may have been included in the sample population. The data base query yielded results based upon patient age but did not take into consideration the gestational age of the infant at the time of birth. Although we excluded all known premature infants, the prem ...
... should be noted. First, premature infants may have been included in the sample population. The data base query yielded results based upon patient age but did not take into consideration the gestational age of the infant at the time of birth. Although we excluded all known premature infants, the prem ...
The Coalescence of the Foramen Lacerum Foramen Lacerum
... The volume rendering technique may be used in the three-dimensional evaluation of some anatomical structures such as the internal carotid artery. Volume rendering technique is a group of modalities for converting two-dimensional images to three-dimensional images [2,4]. The two-dimensional images ac ...
... The volume rendering technique may be used in the three-dimensional evaluation of some anatomical structures such as the internal carotid artery. Volume rendering technique is a group of modalities for converting two-dimensional images to three-dimensional images [2,4]. The two-dimensional images ac ...
Efficient Medical Volume Visualization
... around and moved along the patient, measuring the intensity of x-rays passing through the body as this spiral progresses. The measurement data are then reconstructed into attenuation values on a rectilinear 3D grid using an algorithm based on the Radon transform. In this case, the tissues do not “sh ...
... around and moved along the patient, measuring the intensity of x-rays passing through the body as this spiral progresses. The measurement data are then reconstructed into attenuation values on a rectilinear 3D grid using an algorithm based on the Radon transform. In this case, the tissues do not “sh ...
Quality Assurance in Mammography: Artifact Analysis1
... static-reducing countertop materials in the darkroom; and use of static discharge systems, which provide a continuous flow of ionized air to reduce static charge (2). Processor-related linear artifacts are varied and can be caused by a number of mechanisms. An important first step is differentiation ...
... static-reducing countertop materials in the darkroom; and use of static discharge systems, which provide a continuous flow of ionized air to reduce static charge (2). Processor-related linear artifacts are varied and can be caused by a number of mechanisms. An important first step is differentiation ...
Diffusion-weighted magnetic resonance imaging of the temporal bone
... motion of water molecules in tissue and, more importantly, on the hindrances/facilitations of water molecule movements in various types of tissue. In order to make an MRI sequence sensitive to the diffusion of water molecules, the sequence is expanded with a diffusion-sensitizing gradient scheme, us ...
... motion of water molecules in tissue and, more importantly, on the hindrances/facilitations of water molecule movements in various types of tissue. In order to make an MRI sequence sensitive to the diffusion of water molecules, the sequence is expanded with a diffusion-sensitizing gradient scheme, us ...
PET/CT: Basic Principles, Applications in Oncology
... PET and CT provide complementary information • PET provides functional information but little anatomic detail • CT provides anatomic and morphologic information (size, shape, density of lesions ) but provides little physiologic insight into tissues ...
... PET and CT provide complementary information • PET provides functional information but little anatomic detail • CT provides anatomic and morphologic information (size, shape, density of lesions ) but provides little physiologic insight into tissues ...
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.