Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Physics_of_magnetic_resonance_imaging> ?p ?o }
- Physics_of_magnetic_resonance_imaging abstract "Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to investigate the anatomy and physiology of the body and the physics of the technique involves the interaction of matter with electromagnetic fields. The human body is largely composed of water molecules, each containing two hydrogen nuclei, or protons. When inside the magnetic field (B0) of the scanner, the magnetic moments of these protons align with the direction of the field.A radio frequency pulse is then applied, causing the protons to alter their magnetization alignment relative to the field. In response to the force bringing them back to their equilibrium orientation, the protons undergo a rotating motion (precession), much like a spin wheel under the effect of gravity. These changes in magnetization alignment cause a changing magnetic flux, which yields a changing voltage in receiver coils to give the signal. The frequency at which a proton or group of protons in a voxel resonates depends on the strength of the local magnetic field around the proton or group of protons. By applying additional magnetic fields (gradients) that vary linearly over space, specific slices to be imaged can be selected, and an image is obtained by taking the 2-D Fourier transform of the spatial frequencies of the signal (a.k.a., k-space). Due to the magnetic Lorentz force from B0 on the current flowing in the gradient coils, the gradient coils will try to move. The knocking sounds heard during an MRI scan are the result of the gradient coils trying to move against the constraint of the concrete or epoxy in which they are secured.Diseased tissue, such as tumors, can be detected because the protons in different tissues return to their equilibrium state at different rates (i.e., they have different relaxation times). By changing the parameters on the scanner this effect is used to create contrast between different types of body tissue.Contrast agents may be injected intravenously to enhance the appearance of blood vessels, tumors or inflammation. Contrast agents may also be directly injected into a joint in the case of arthrograms, MRI images of joints. Unlike CT, MRI uses no ionizing radiation and is generally a very safe procedure. Patients with some metal implants, cochlear implants, and cardiac pacemakers are prevented from having an MRI scan due to effects of the strong magnetic field and powerful radio frequency pulses.MRI is used to image every part of the body, and is particularly useful for neurological conditions, for disorders of the muscles and joints, for evaluating tumors, and for showing abnormalities in the heart and blood vessels.".
- Physics_of_magnetic_resonance_imaging thumbnail Modern_3T_MRI.JPG?width=300.
- Physics_of_magnetic_resonance_imaging wikiPageID "26412019".
- Physics_of_magnetic_resonance_imaging wikiPageLength "39216".
- Physics_of_magnetic_resonance_imaging wikiPageOutDegree "117".
- Physics_of_magnetic_resonance_imaging wikiPageRevisionID "681372824".
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Amateur_radio.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Anatomy.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Atomic_nucleus.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Barium_sulfate.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Blood_oxygenation.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Blood_vessel.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Body_water.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink B₀.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink CNR_(imaging).
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink CT_scan.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Category:Magnetic_resonance_imaging.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Cerebral_blood_flow.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Cerebral_blood_volume.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Cerebrospinal_fluid.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Cochlear_implant.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Computed_Tomography.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Computed_tomography.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Contrast_(vision).
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Contrast_agents.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Contrast_medium.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Contrast_resolution.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Cryocooler.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Cryostat.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Diamagnetism.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Diffusion_MRI.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Digestion.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Echo-planar_imaging.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Eigenvalue,_eigenvector_and_eigenspace.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Eigenvalues_and_eigenvectors.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Electric_field.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Electromagnetic_field.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Electromagnetic_radiation.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Electromagnetic_spectrum.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Enthalpy.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Entropy.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Faraday_cage.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink File:Mri_scanner_schematic_labelled.svg.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Fourier_inversion_theorem.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Fourier_transform.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Free_induction_decay.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Functional_magnetic_resonance_imaging.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Gadolinium.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Gastrointestinal_tract.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Gauss_(unit).
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Gray_matter.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Grey_matter.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Hertz.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Hydrogen.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Inflammation.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Intravenous_therapy.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Inverse_Fourier_transform.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Ionizing_radiation.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Iron_oxide.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink K-space_(MRI).
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink K-space_(magnetic_resonance_imaging).
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Larmor_precession.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Liquid_helium.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Liquid_nitrogen.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Liver.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Lorentz_force.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink MRI_contrast_agent.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Magnetic_dipole_moment.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Magnetic_field.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Magnetic_flux.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Magnetic_moment.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Magnetic_resonance_imaging.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Magnetic_susceptibility.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Medical_imaging.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Megahertz.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Nanoparticle.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Near_and_far_field.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Neodymium.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Neoplasm.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Niobium-tin.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Niobium-titanium.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Nuclear_magnetic_resonance.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Nutation.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Nyquist_theorem.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Nyquist–Shannon_sampling_theorem.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Pancreas.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Paramagnetic.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Paramagnetism.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Paranasal_sinuses.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Pathology.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Photon.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Physics_of_magnetic_resonance_imaging.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Precession.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Proton.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Protons.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Pulse_oximetry.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Pulse_sequence.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Quantum_mechanics.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Radiofrequency_coil.
- Physics_of_magnetic_resonance_imaging wikiPageWikiLink Rare_earth_element.