MSc Seferis
... in the mid-1980s, but the promise of digital imaging was not realized until the early 1990s, in conjunction with the establishment of first generation picture archiving and communications systems (PACS). At the time, film screen detectors have nearly replaced by computed radiography systems (CR), ch ...
... in the mid-1980s, but the promise of digital imaging was not realized until the early 1990s, in conjunction with the establishment of first generation picture archiving and communications systems (PACS). At the time, film screen detectors have nearly replaced by computed radiography systems (CR), ch ...
Multislice Computed Tomography: Basic Principles and Clinical
... rotation, more powerful x-ray tubes, and improved interpolation algorithms [1, 2]. However, in practice the spiral data sets from monoslice systems suffered from a considerable mismatch between the transverse (in plane) and the longitudinal (axial) spatial resolution. In other words the isotropic 3- ...
... rotation, more powerful x-ray tubes, and improved interpolation algorithms [1, 2]. However, in practice the spiral data sets from monoslice systems suffered from a considerable mismatch between the transverse (in plane) and the longitudinal (axial) spatial resolution. In other words the isotropic 3- ...
Standards for Chest Radiography
... the essential criteria is recognized. When working with mAs a combination must be selected that will yield the shortest exposure time. When the operator can select mA and time, there is more control over the technical factors, and again the shortest possible exposure time is essential. * Distance: T ...
... the essential criteria is recognized. When working with mAs a combination must be selected that will yield the shortest exposure time. When the operator can select mA and time, there is more control over the technical factors, and again the shortest possible exposure time is essential. * Distance: T ...
Electronic Posters: Pulse Sequences, Reconstruction
... Division of Imaging Sciences, King's College London, London, United Kingdom; 2Centre for Medical Image Computing, University College London, London, United Kingdom An autocalibrated approach for the combination of Compressed Sensing (CS) and SENSE is proposed. This method is based on the sequential ...
... Division of Imaging Sciences, King's College London, London, United Kingdom; 2Centre for Medical Image Computing, University College London, London, United Kingdom An autocalibrated approach for the combination of Compressed Sensing (CS) and SENSE is proposed. This method is based on the sequential ...
Image reconstruction Ð a tutorial
... Analytic reconstruction algorithms, for example the ®ltered backprojection algorithm, are ef®cient and elegant, but they are unable to handle complicated factors such as scatter. Iterative reconstruction algorithms on the other hand are more versatile but less ef®cient. Ef®cient (i.e. fast) iterativ ...
... Analytic reconstruction algorithms, for example the ®ltered backprojection algorithm, are ef®cient and elegant, but they are unable to handle complicated factors such as scatter. Iterative reconstruction algorithms on the other hand are more versatile but less ef®cient. Ef®cient (i.e. fast) iterativ ...
Current concepts on magnetic resonance imaging (MRI)
... MRI include: DWI, PWI, T2-weighted imaging, fluidattenuated inversion-recovery imaging (FLAIR), T2*weighted gradient-echo imaging with susceptibilityweighted imaging, and MR angiography24; these sequences may require an acquisition time of up to 20 min, allowing for another 25 min for the radiologis ...
... MRI include: DWI, PWI, T2-weighted imaging, fluidattenuated inversion-recovery imaging (FLAIR), T2*weighted gradient-echo imaging with susceptibilityweighted imaging, and MR angiography24; these sequences may require an acquisition time of up to 20 min, allowing for another 25 min for the radiologis ...
Clearly The Choice - Raleigh Radiology
... This exam is for patients that are at high risk for lung cancer. Patients at high risk possess the following characteristics and should participate in a shared decision conversation with their physician. • Individuals 55 -80 years of age for most commercials insurances. (Medicare will not cover aft ...
... This exam is for patients that are at high risk for lung cancer. Patients at high risk possess the following characteristics and should participate in a shared decision conversation with their physician. • Individuals 55 -80 years of age for most commercials insurances. (Medicare will not cover aft ...
High numerical aperture tabletop soft x-ray diffraction microscopy with 70-nm resolution
... imaging 兩 lensless 兩 nanoscale 兩 extreme-ultraviolet 兩 ultrafast ...
... imaging 兩 lensless 兩 nanoscale 兩 extreme-ultraviolet 兩 ultrafast ...
Gas Phase UTE MRI of Propane and Propene
... pressures was shown about 15 years ago, with 2-dimensional (2D) images of flowing and static gas and flow velocity maps in pipes and multichannel monolith structures detected using a spin-echo pulse sequence (28, 29). In addition to the low spin density of gases, the rapid diffusion of gases in appl ...
... pressures was shown about 15 years ago, with 2-dimensional (2D) images of flowing and static gas and flow velocity maps in pipes and multichannel monolith structures detected using a spin-echo pulse sequence (28, 29). In addition to the low spin density of gases, the rapid diffusion of gases in appl ...
RESEARCH ARTICLE New Directions in X
... amount of information was accumulated using these microscopes especially about biology and medicine. The microscopist is very often faced with the need to improve the resolution, to see more detail in the specimen. It was known since the early part of the 20th century that X-rays had about three ord ...
... amount of information was accumulated using these microscopes especially about biology and medicine. The microscopist is very often faced with the need to improve the resolution, to see more detail in the specimen. It was known since the early part of the 20th century that X-rays had about three ord ...
MR Imaging of Scrotal Tumors and Pseudotumors1
... mass after lipoma and adenomatoid tumor. Fibrous pseudotumors are not true neoplasms but represent benign reactive fibrous proliferation that results in one or several paratesticular nodules, usually arising from the tunica vaginalis. Fibrous pseudotumors have been reported that were as large as 8 c ...
... mass after lipoma and adenomatoid tumor. Fibrous pseudotumors are not true neoplasms but represent benign reactive fibrous proliferation that results in one or several paratesticular nodules, usually arising from the tunica vaginalis. Fibrous pseudotumors have been reported that were as large as 8 c ...
predicting the location and probability of viable tumor within
... We show a method of integrating multiple MRI markers to produce a single composite image which predicts the probability of viable tumor within a GBM lesion. We demonstrate the discrepancy between the estimation of tumor volume with a multi-parametric approach compared to relying on contrast enhanc ...
... We show a method of integrating multiple MRI markers to produce a single composite image which predicts the probability of viable tumor within a GBM lesion. We demonstrate the discrepancy between the estimation of tumor volume with a multi-parametric approach compared to relying on contrast enhanc ...
Meandering Main Pancreatic Duct in a Case of Recurrent Acute
... episode, which showed necrotic collection in pancreatic head region. Main pancreatic duct was not well visualized on MRCP images due to compression by the collection. The patient was managed by percutaneous drainage of the collection. However the patient continued to have recurrent episodes of acute ...
... episode, which showed necrotic collection in pancreatic head region. Main pancreatic duct was not well visualized on MRCP images due to compression by the collection. The patient was managed by percutaneous drainage of the collection. However the patient continued to have recurrent episodes of acute ...
Diffusion-weighted MRI in cervical lymph nodes: Differentiation
... In all patients we used fast spin echo T2-weighted images in axial and coronal planes, fast spin echo T1-weighted images before and after contrast medium of administration in axial and coronal planes. Before contrast administration diffusion sequences were acquired on the axial and coronal plane (b ...
... In all patients we used fast spin echo T2-weighted images in axial and coronal planes, fast spin echo T1-weighted images before and after contrast medium of administration in axial and coronal planes. Before contrast administration diffusion sequences were acquired on the axial and coronal plane (b ...
Hyperextension injuries: - Virginia Veterinary Medical Association
... that are actively remodeling bone. By doing this, the radioactive Technetium is deposited at the site of osteoblastic activity and as the radioactive material decays, it emits a gamma ray. This gamma radiation escapes the body for external detection and measurement by a scintillation camera. The cam ...
... that are actively remodeling bone. By doing this, the radioactive Technetium is deposited at the site of osteoblastic activity and as the radioactive material decays, it emits a gamma ray. This gamma radiation escapes the body for external detection and measurement by a scintillation camera. The cam ...
Electronic Posters: Musculoskeletal
... The recently described 3D-magnetic resonance observation of cartilage repair tissue (MOCART) score was prepared by standard MR sequences, by an isotropic PDfs-weighted 3D-TSE-sequence (PD-SPACE), and by an isotropic 3D-steady-state-free-precession sequence (True-FISP) to assess correlations in the d ...
... The recently described 3D-magnetic resonance observation of cartilage repair tissue (MOCART) score was prepared by standard MR sequences, by an isotropic PDfs-weighted 3D-TSE-sequence (PD-SPACE), and by an isotropic 3D-steady-state-free-precession sequence (True-FISP) to assess correlations in the d ...
Optoacoustic tomography using time
... such as tumors and blood vessels in highly scattering tissue would be useful in a wide variety of medical applications. Techniques such as confocal microscopy and optical coherence tomography provide high-resolution images but cannot be applied to depths larger than 0.5 to 2 mm in turbid tissues.1–5 ...
... such as tumors and blood vessels in highly scattering tissue would be useful in a wide variety of medical applications. Techniques such as confocal microscopy and optical coherence tomography provide high-resolution images but cannot be applied to depths larger than 0.5 to 2 mm in turbid tissues.1–5 ...
Computed Radiography Technology1
... phosphors were used in night-vision cameras, in which an infrared scene (the photostimulation source) imaged onto a previously energized SP detector would cause it to release its energy as a visible-light replica of the invisible input. This is an example of the up-conversion mode of operation, beca ...
... phosphors were used in night-vision cameras, in which an infrared scene (the photostimulation source) imaged onto a previously energized SP detector would cause it to release its energy as a visible-light replica of the invisible input. This is an example of the up-conversion mode of operation, beca ...
User Interface of a Teleradiology System for the
... quantitative assessment of MR exams cannot be performed because it is time-expensive, it requires advanced techniques and trained personnel. Improvements in information technology have led to a rapid development of teleradiology, the electronic transmission of radiological images from one location t ...
... quantitative assessment of MR exams cannot be performed because it is time-expensive, it requires advanced techniques and trained personnel. Improvements in information technology have led to a rapid development of teleradiology, the electronic transmission of radiological images from one location t ...
Color Doppler Ultrasonography: Diagnosis of Ectopic Thyroid Gland
... ONGENITAL HYPOTHYROIDISM (CH) causes irreversible mental retardation without T4 replacement from early life. Since the implementation of newborn screening programs for CH, early diagnosis and treatment begins the first weeks of life, resulting in a dramatic improvement in the outcomes of intellectua ...
... ONGENITAL HYPOTHYROIDISM (CH) causes irreversible mental retardation without T4 replacement from early life. Since the implementation of newborn screening programs for CH, early diagnosis and treatment begins the first weeks of life, resulting in a dramatic improvement in the outcomes of intellectua ...
Full Text - Digital Access to Scholarship at Harvard
... to evolve as 3D coronary angiographic techniques become incorporated into routine angiography to provide more detailed descriptions of complex lesions, such as bifurcations, eccentric lesions and chronic total occlusions. Furthermore, scoring systems which include both clinical and angiographic char ...
... to evolve as 3D coronary angiographic techniques become incorporated into routine angiography to provide more detailed descriptions of complex lesions, such as bifurcations, eccentric lesions and chronic total occlusions. Furthermore, scoring systems which include both clinical and angiographic char ...
12 Physics and Clinical Aspects of Brachytherapy
... rapid falloff of dose away from the sources, brachytherapy allows the delivery of greater tumor doses than external beam radiation therapy, while retaining excellent sparing of neighboring critical organs. Compared with surgery, brachytherapy does not create a tissue deficit, thereby allowing potent ...
... rapid falloff of dose away from the sources, brachytherapy allows the delivery of greater tumor doses than external beam radiation therapy, while retaining excellent sparing of neighboring critical organs. Compared with surgery, brachytherapy does not create a tissue deficit, thereby allowing potent ...
Do Now - Dublin City Schools
... 3/06/2009 From http://en.wikipedia.org/wiki/Computed_Axial_Tomography ...
... 3/06/2009 From http://en.wikipedia.org/wiki/Computed_Axial_Tomography ...
Time-resolved contrast-enhanced 3D MR angiography
... acquisition. If the center of k-space is acquired too early, maximum signal in the arteries will not be achieved, and if the center of k-space is acquired too late, the veins will be enhanced, causing the arteries to be obscured. Another drawback of current contrast-enhanced 3D methods is that they ...
... acquisition. If the center of k-space is acquired too early, maximum signal in the arteries will not be achieved, and if the center of k-space is acquired too late, the veins will be enhanced, causing the arteries to be obscured. Another drawback of current contrast-enhanced 3D methods is that they ...