![]() ![]() ![]() Some patients with tattoos or permanent cosmetics should also avoid MRI because of the risk of burns. Patients who have had surgical procedures after which magnetizable metal clips, pins, or other hardware remain in the body should not have this imaging. Patients should not wear metal objects, e.g., jewelry, hair ornaments, or watches. Metal may become damaged during testing therefore, health care providers must establish whether the patient has magnetizable metal anywhere on or in the body. CAUTION!Magnetic resonance imaging is contraindicated in patients with cardiac pacemakers or ferromagnetic aneurysmal clips in place. Agents such as gadolinium are available for contrast enhancement but must be used with caution in patients with renal insufficiency. ![]() Imaging techniques allow visualization of the vascular system without the use of contrast agents. This technique is valuable in providing soft-tissue images of the central nervous and musculoskeletal systems. The resulting current passes through a radiofrequency receiver and is then transformed into an image. Certain atomic nuclei with an odd number of neutrons, protons, or both are subjected to a radiofrequency pulse, causing them to absorb and release energy. Imaging that uses the characteristic behavior of protons when placed in powerful magnetic fields to make images of tissues and organs. See Brain imaging, Cardiac blood pool imaging, Contrast imaging, Diffusion-weighted imaging, Digital imaging, Document imaging, Doppler sonographic imaging, Echo planar imaging, Fast CT imaging, Fluorescence imaging, fMRI imaging, 4-D imaging, Freeze-fracture imaging, 1H imaging, Harmonic ultrasound imaging, Magnetic resonance imaging, Molecular imaging, Multiband imaging, Multiple plane imaging, Myocardial perfusion imaging, Native ™ tissue harmonic imaging, Neuroimaging imaging, 32P imaging, Perfusion-weighted imaging, Real-time imaging, Sequential plane imaging, Somatostatin-receptor imaging, Spin-echo imaging, SQUID imaging, Structural imaging, Transient response imaging, Volume imaging. imaging The term is used in 2 different areas of diagnostic medicine Radiology The production of non-invasive images of body regions using ionizing radiation–eg, CT or mammography, or electromagnetic radiation–eg, MRI or ultrasonography, with/without radiocontrast the information obtained is then analyzed by a computer to produce a 2-D display Types of information provided Anatomic–CT, MRI, mammography, ultrasonography, metabolic–PET, SPECT-single photon emission CT or data on electrical activity–SQUID. ![]()
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