Nuclear magnetic resonance Health Dictionary

The branch of medicine concerned with the use of radioactive material in the diagnosis, investigation and treatment of disease.... nuclear medicine

The air carrying the voice produced in the LARYNX passes through the throat, mouth and nose. The shape and size of these structures will in?uence the timbre of the voice, or vocal resonance. This will vary from person to person and even within an individual; for example, with a cold.... vocal resonance

See MRI.... magnetic resonance imaging

See MRI.... magnetic resonance imaging(mri)

The lengthening and intensi?cation of sound produced by striking the body over an air-containing structure such as the lung. Decrease of resonance is called dullness and increase of resonance is called hyper-resonance. The process of striking the chest or other part of the body to discover its degree of resonance is called PERCUSSION, and according to the note obtained, an opinion can be formed as to the state of consolidation of air-containing organs, the presence of abnormal cavities, and the dimensions and relations of solid and air-containing organs lying together. (See also AUSCULTATION.)... resonance

The energy released as a result of changes in the nuclei of atoms. It is also known as atomic energy and is principally released in the form of heat, light, and ionizing radiation, such as gamma rays.

Nuclear energy is released in certain natural processes, including the spontaneous decay of radioactive substances such as uranium ores, and the nuclear reactions that power the sun. It is also what powers nuclear reactors.... nuclear energy

(fMRI) a type of *magnetic resonance imaging that measures the increased hemodynamic response seen with neural activity in the brain or spinal cord. fMRI has allowed major advances in brain mapping (i.e. matching sections of the brain with particular behaviours, thoughts, or emotions).... functional magnetic resonance imaging

see 3-D magnetic imager.... magnetic imager

(MRS) a diagnostic technique that utilizes the phenomenon of *nuclear magnetic resonance to obtain a biochemical profile of tissues by exciting elements other than hydrogen in water and other body components. It is particularly useful for biochemical analysis of tissues in the living body. This technique is used clinically in the brain and prostate.... magnetic resonance spectroscopy

the study and diagnosis of heart disease by the intravenous injection of different types of *radionuclide. The radionuclide emits gamma rays, enabling a gamma camera and computer to form an image of the heart. See MUGA scan; myocardial perfusion scan; SPECT scanning.... nuclear cardiology

(rTMS) see transcranial magnetic stimulation.... repetitive transcranial magnetic stimulation

an instrument that harnesses magnetic technology to give a virtual image of an endoscope during colonoscopy. It aids steering and minimalizes looping of the endoscope. An external antenna tracks the magnetic field generated by coils built inside the endoscope, enabling real-time 3D imaging of this instrument. Trade name: ScopeGuide.... 3-d magnetic imager

(TMS) stimulation of the brain by strong magnetic fields that induce electric currents in the underlying brain tissue. Repetitive transcranial magnetic stimulation (rTMS), consisting of a series of TMS pulses, is used to treat depression. Its clinical utility is controversial, with inconsistent research results regarding its efficacy. Although there have been some small studies regarding its use with other conditions, such as OCD, rTMS is not currently used routinely in the treatment for any illness other than depression.... transcranial magnetic stimulation