PPT-Recognizing and Minimizing Artifacts at CT, MRI, US, and Molecular Imaging

Benjamin L Triche MD John T Nelson Jr MD Noah S McGill MD Kristin K Porter MD PhD Rupan Sanyal MD Franklin N Tessler MD Jonathan E McConathy MD PhD . Role of Artifacts in Educator Support and . Evaluation. Spring 2015 Webinar. Outcomes. Explain . the three . categories . of evidence required by the Oregon Framework, and identify concrete examples of . System . The Extremities. . . Richard L. . Sulek. , D.O.. Objectives. Discuss:. commonly used imaging modalities in the musculoskeletal system. Perianal. fistula. Dr. Ahmed . Refaey. , FRCR. . Consultant Radiologist. Riyadh Military Hospital. Format of the lecture. Anatomy. Pathogenesis . Imaging techniques. QUIZ. 3. : . Shoulder. Imaging. What is the . mean goal of . T1WS ?.  :. A : to analyze the . trophicity. and . /or the fatty . degeneration of the . muscles . of rotator cuff. 2,000-year-old meteoritic . iron beads, recovered from mounds in Havana, Illinois of the Hopewell people and culture, . show deformed . and folded . Widmanstätten. pattern.. Similar chemical characteristics between the meteoritic . EULAR recommendations for the use of imaging in the diagnosis and management of spondyloarthritis in clinical practice Target population/question 2 26/3/18 Target population: patients with suspected or diagnosed axial or peripheral BRACHIAL PLEXUS IMAGING :. Basic anatomy. Pathologies affecting Brachial Plexus. Modalities of Imaging :. Conventional methods.. Ultrasound. CT and CT . Myelography. MR. ANATOMY : FORMATION : . Derived from anterior primary rami of C5 to C8 and T1.. Magnetic Field. While MRI is considered to be a safe imaging technique, it is not without hazards. The magnet field will attract many ferromagnetic metals in an uncontrolled fashion and cause them to fly towards the magnets bore and turning them into high velocity projectiles. The bore of the magnet is where the fringe field is strongest, as all the lines of force are constricted and their relative strengths heightened. Various objects can be considered projectiles. Magnetic Resonance Imaging (MRI) is a painless and harmless examination. This type of scan uses a powerful magnetic field and radio frequencies. It does not use Xrays. It isa technique that allows do F Edward Boas & Dominik Fleischmann* Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305, USA *Author for correspondence: Tel.: +1 650 723 7647 d.fle Moderator: Dr. K. B . Umamaheshwari. Presenter: Dr. Ameet Mudda. introduction. Artifacts can seriously degrade the quality of computed . tomographic. (CT) images, sometimes to the point of making them diagnostically unusable.. Institut. Fresnel. Aix . Marseille . Université. , CNRS, Centrale Marseille. OUTLINE. . MRI . BASICS . B. 1. +. inhomogeneity at Ultra High Field. M-Cube objectives. Shaping B. 1. + . with metamaterial. Improve SNR.. Avoid saturation of the signal.. Avoid loss of useful information.. Reduce artifacts.. Optimize resolution.. Limit examination time.. ARTIFACTS. Defined as a . feature appearing in an ultrasound image . Plain X-Ray Films. Myelogram – injection of contrast medium in CSF followed by x-ray images. Rarely performed. now-a-days. Computed Tomography (CT Scan) . Magnetic Resonance Imaging (MRI). Discogram - injection of contrast medium in the disc followed by x-ray images .