(MRI) of the Soft - American College of Radiology
... patients. Practice Parameters and Technical Standards are not inflexible rules or requirements of practice and are 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 medic ...
... patients. Practice Parameters and Technical Standards are not inflexible rules or requirements of practice and are 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 medic ...
Artifacts on multi-detector computed tomography (MDCT)
... scan. In case of irremovable objects such as dental fillings, surgical clips, prosthesis or orthopedic appliances, the X-ray tube gantry angulations can be set in order to exclude these objects. Alternatively, increasing kVp will allow some penetration, and using thinner sections will reduce artifac ...
... scan. In case of irremovable objects such as dental fillings, surgical clips, prosthesis or orthopedic appliances, the X-ray tube gantry angulations can be set in order to exclude these objects. Alternatively, increasing kVp will allow some penetration, and using thinner sections will reduce artifac ...
Uygar Sümbül - Department of Statistics
... • Whole cell analysis of synapse distributions (with Prof. Liam Paninski and Prof. Franck Polleux) All excitatory and inhibitory synapses on the dendritic arbors of cortical pyramidal neurons are identified using structural and molecular information. Statistical methods are devised to analyze their ...
... • Whole cell analysis of synapse distributions (with Prof. Liam Paninski and Prof. Franck Polleux) All excitatory and inhibitory synapses on the dendritic arbors of cortical pyramidal neurons are identified using structural and molecular information. Statistical methods are devised to analyze their ...
MR Pulse Sequences - Diagnostic Radiology
... How does the MR imaging system detect which tissue the signal is coming from? For this purpose, gradients are employed. Gradients are linear variations of the magnetic field strength in a selected region (11). Along with the magnetic field strength, the precessional frequency of 1H nuclei is also ch ...
... How does the MR imaging system detect which tissue the signal is coming from? For this purpose, gradients are employed. Gradients are linear variations of the magnetic field strength in a selected region (11). Along with the magnetic field strength, the precessional frequency of 1H nuclei is also ch ...
Quantification of SPECT myocardial perfusion imaging. Acampa W
... SPECT imaging provides important prognostic information in patients with either known or suspected coronary artery disease. An important significance has been given to the evaluation of the extent of myocardial perfusion defects. For example, in patients with known coronary artery disease and LV dys ...
... SPECT imaging provides important prognostic information in patients with either known or suspected coronary artery disease. An important significance has been given to the evaluation of the extent of myocardial perfusion defects. For example, in patients with known coronary artery disease and LV dys ...
Study on the Computed Tomography Dose Index volume
... Computed Tomography (CT) is probably most significant development in history of medical imaging since the discovery of x-rays in 1895. Since its invention; CT imaging has seen massive advances in technology and clinical performance. Multislice CT or multi detector rows CT (MDCT) represents the new b ...
... Computed Tomography (CT) is probably most significant development in history of medical imaging since the discovery of x-rays in 1895. Since its invention; CT imaging has seen massive advances in technology and clinical performance. Multislice CT or multi detector rows CT (MDCT) represents the new b ...
Influence of optical properties on two-photon fluorescence
... et al.1 One of the advantages of two-photon fluorescence over conventional fluorescence imaging is that near-infrared light is used, which penetrates more deeply into tissue, owing to decreased scattering. Recent applications of intravital, two-photon fluorescence imaging have included video-rate im ...
... et al.1 One of the advantages of two-photon fluorescence over conventional fluorescence imaging is that near-infrared light is used, which penetrates more deeply into tissue, owing to decreased scattering. Recent applications of intravital, two-photon fluorescence imaging have included video-rate im ...
Course Brochure
... Practicing physicians in sports medicine and related clinical subspecialties who desire to familiarize themselves with the current role of imaging in patient evaluation • Allied health care professionals who desire to have an update on the state of current imaging as an aid to patient management for ...
... Practicing physicians in sports medicine and related clinical subspecialties who desire to familiarize themselves with the current role of imaging in patient evaluation • Allied health care professionals who desire to have an update on the state of current imaging as an aid to patient management for ...
Attenuation correction of myocardial perfusion SPET in patients of
... patients who are obese and is not performed on patients with normal BMI, as was the case in our department. The remit of this study was not to evaluate the diagnostic accuracy of attenuation correction as this has been extensively covered in the literature, but to determine whether there is a differ ...
... patients who are obese and is not performed on patients with normal BMI, as was the case in our department. The remit of this study was not to evaluate the diagnostic accuracy of attenuation correction as this has been extensively covered in the literature, but to determine whether there is a differ ...
Review of transmission scanning configurations in cardiac SPECT
... usually is equipped with a fan-beam collimator. But, based on the studies performed for attenuation correction, two “emission only” detectors may be equipped with parallel-hole or fan-beam collimators. Also, each detector acquire two data sets in two different energy windows: one centered on the emi ...
... usually is equipped with a fan-beam collimator. But, based on the studies performed for attenuation correction, two “emission only” detectors may be equipped with parallel-hole or fan-beam collimators. Also, each detector acquire two data sets in two different energy windows: one centered on the emi ...
Electroencephalographic source imaging: a prospective
... Electroencephalography is mandatory to determine the epilepsy syndrome. However, for the precise localization of the irritative zone in patients with focal epilepsy, costly and sometimes cumbersome imaging techniques are used. Recent small studies using electric source imaging suggest that electroen ...
... Electroencephalography is mandatory to determine the epilepsy syndrome. However, for the precise localization of the irritative zone in patients with focal epilepsy, costly and sometimes cumbersome imaging techniques are used. Recent small studies using electric source imaging suggest that electroen ...
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... The objective of this paper was: 1) to systematically study the effect of breast-like optical heterogeneity on DOT performance; 2) to evince on the appearance of characteristic artifacts in front of the sources and detectors because of this heterogeneity; and 3) to show that under certain practical ...
... The objective of this paper was: 1) to systematically study the effect of breast-like optical heterogeneity on DOT performance; 2) to evince on the appearance of characteristic artifacts in front of the sources and detectors because of this heterogeneity; and 3) to show that under certain practical ...
Dynamic contrast-enhanced breast MRI at 7T and 3T: an intra
... still needs to at least offer comparable imaging results to the current clinical standard of 3T imaging to maintain good medical care. Comparisons of 7T versus breast imaging at lower field strengths are scarce. So far, studies with healthy volunteers imaged using T1-weighted (T1w) non contrastenhan ...
... still needs to at least offer comparable imaging results to the current clinical standard of 3T imaging to maintain good medical care. Comparisons of 7T versus breast imaging at lower field strengths are scarce. So far, studies with healthy volunteers imaged using T1-weighted (T1w) non contrastenhan ...
Full PDF - American Journal of Physiology
... emission computed tomography (SPECT) requires correction for the imagedegrading effects due to photon attenuation and scatter. Phantom experiments have shown that radioactive concentrations can be assessed within some percentage of the true value when relevant corrections are applied. SPECT is widel ...
... emission computed tomography (SPECT) requires correction for the imagedegrading effects due to photon attenuation and scatter. Phantom experiments have shown that radioactive concentrations can be assessed within some percentage of the true value when relevant corrections are applied. SPECT is widel ...
Four Slice CT Scanner Comparison Report
... comparison of the specification of each scanner, workstation and related equipment, showing the parameters that are considered to be most important for inter-scanner comparison. An extended version of this, giving greater detail can be found in Appendix 1 – Extended Specification Comparison. ...
... comparison of the specification of each scanner, workstation and related equipment, showing the parameters that are considered to be most important for inter-scanner comparison. An extended version of this, giving greater detail can be found in Appendix 1 – Extended Specification Comparison. ...
Physiological imaging of the lung: single-photon
... emission computed tomography (SPECT) requires correction for the imagedegrading effects due to photon attenuation and scatter. Phantom experiments have shown that radioactive concentrations can be assessed within some percentage of the true value when relevant corrections are applied. SPECT is widel ...
... emission computed tomography (SPECT) requires correction for the imagedegrading effects due to photon attenuation and scatter. Phantom experiments have shown that radioactive concentrations can be assessed within some percentage of the true value when relevant corrections are applied. SPECT is widel ...
Radiation dose reduction in computed tomography
... fast scanning speed and isotropic spatial resolu‑ tion at 0.3–0.4 mm, CT allows physicians to diagnose injuries and disease more quickly, safely and accurately than alternative more invasive or less sensitive imaging techniques. CT imaging also plays a major role in the staging, treatment planning a ...
... fast scanning speed and isotropic spatial resolu‑ tion at 0.3–0.4 mm, CT allows physicians to diagnose injuries and disease more quickly, safely and accurately than alternative more invasive or less sensitive imaging techniques. CT imaging also plays a major role in the staging, treatment planning a ...
Generation of Rapid Eye Movements during Paradoxical Sleep in
... 1999a); they constitute one of the distinguishing features of PS. Although observed in many parts of the animal brain (Hobson, 1964), PGO waves are most easily recorded in the pons (Jouvet et al., 1959), the lateral geniculate bodies (Mikiten et al., 1961), and the occipital cortex (Mouret et al., 1 ...
... 1999a); they constitute one of the distinguishing features of PS. Although observed in many parts of the animal brain (Hobson, 1964), PGO waves are most easily recorded in the pons (Jouvet et al., 1959), the lateral geniculate bodies (Mikiten et al., 1961), and the occipital cortex (Mouret et al., 1 ...
MEDICAL PHYSICS INTERNATIONAL
... algorithms that utilize additional system information to enable further CT radiation dose reduction and image quality improvement is the next step in CT technology innovation. Although these more advanced algorithms have been used in single-photon-emission computed tomography and positron-emission t ...
... algorithms that utilize additional system information to enable further CT radiation dose reduction and image quality improvement is the next step in CT technology innovation. Although these more advanced algorithms have been used in single-photon-emission computed tomography and positron-emission t ...
Dose reduction in maxillofacial imaging using low dose
... beam. The findings resulting from the study are in agreement with other investigations, which have identified the highest absorbed radiation doses in these areas [10,15,22,24]. Contrary, the thyroid gland and the eyes received the lowest radiation dose during tomography, probably because these areas ...
... beam. The findings resulting from the study are in agreement with other investigations, which have identified the highest absorbed radiation doses in these areas [10,15,22,24]. Contrary, the thyroid gland and the eyes received the lowest radiation dose during tomography, probably because these areas ...
Past development of DWI in abdominal MRI
... Magnetic resonance (MR) enterography plays an important role in the diagnosis and follow-up of patients with Crohn disease (CD). As these patients with CD usually need repeated imaging examinations, the lack of radiation exposure is a major advantage of MR enterography over CT enterography. Diffusio ...
... Magnetic resonance (MR) enterography plays an important role in the diagnosis and follow-up of patients with Crohn disease (CD). As these patients with CD usually need repeated imaging examinations, the lack of radiation exposure is a major advantage of MR enterography over CT enterography. Diffusio ...
Non-Invasive Microstructure and Morphology
... Methods: In this study, a recently emerged imaging technique, in-line X-ray phase contrast imaging (IL-XPCI) was used. This powerful technique enabled high-resolution investigations of soft tissues without contrast agents. We applied IL-XPCI to observe the lungs in an intact mouse for the purpose of ...
... Methods: In this study, a recently emerged imaging technique, in-line X-ray phase contrast imaging (IL-XPCI) was used. This powerful technique enabled high-resolution investigations of soft tissues without contrast agents. We applied IL-XPCI to observe the lungs in an intact mouse for the purpose of ...
Proton Spectroscopic and Dynamic Contrast
... At present, the evaluation of prostate cancer is more determined by the use of clinical nomograms including prostate-specific antigen (PSA) determination and by pathologic findings of the tumour at biopsy or after surgery. For a long time, a valid diagnostic imaging procedure has not been available ...
... At present, the evaluation of prostate cancer is more determined by the use of clinical nomograms including prostate-specific antigen (PSA) determination and by pathologic findings of the tumour at biopsy or after surgery. For a long time, a valid diagnostic imaging procedure has not been available ...
Copyright Information of the Article Published Online TITLE
... frequency of infective exacerbations and disease progression[19,20], one must remain cognisant of the radiation dose incurred from this method of assessment[21]. Recent studies have shown that the dose from dose optimised CT scans is equivalent to one-third of one year’s background radiation[22]. P ...
... frequency of infective exacerbations and disease progression[19,20], one must remain cognisant of the radiation dose incurred from this method of assessment[21]. Recent studies have shown that the dose from dose optimised CT scans is equivalent to one-third of one year’s background radiation[22]. P ...
Full Text - RSNA Publications Online
... were of uniform Gleason grade 3 or 4 or contained Gleason grade 5 components were analyzed; if a patient had more than one such tumor, the two largest tumors were analyzed. On both corrected and uncorrected transverse T2weighted images, by using the pathologic maps as a guide, the radiologist (L.W.) ...
... were of uniform Gleason grade 3 or 4 or contained Gleason grade 5 components were analyzed; if a patient had more than one such tumor, the two largest tumors were analyzed. On both corrected and uncorrected transverse T2weighted images, by using the pathologic maps as a guide, the radiologist (L.W.) ...
Positron emission tomography
Positron emission tomography (PET) is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern PET-CT scanners, three dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.If the biologically active molecule chosen for PET is fluorodeoxyglucose (FDG), an analogue of glucose, the concentrations of tracer imaged will indicate tissue metabolic activity as it corresponds to the regional glucose uptake. Use of this tracer to explore the possibility of cancer metastasis (i.e., spreading to other sites) is the most common type of PET scan in standard medical care (90% of current scans). However, on a minority basis, many other radioactive tracers are used in PET to image the tissue concentration of other types of molecules of interest. One of the disadvantages of PET scanners is their operating cost.