| NMRS | nuclear magnetic resonance spectroscopy |
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| PMR | patient meta-record; perinatal mortality rate; periodic medical review; physical medicine and rehabi... |
| TMR | tissue maximum ratio; topical magnetic resonance; trainable mentally retarded |
| TNMR | tritium nuclear magnetic resonance |
| VEC-MR | velocity encoded cine-magnetic resonance |
| ratio imaging fluorescence microscopy | <procedure> A method of measurement of intracellular pH or intracellular calcium levels, using a fluorescent probe molecule (see fura-2), in which the two different excitation wavelengths are used and the emitted light levels compared. If emission at one wavelength is sensitive to the intracellular ion level and emission at the other wavelength is not, then standardisation for intracellular probe concentration, efficiency of light collection, inactivation of probe and thickness of cytoplasm can all be performed automatically. (17 Dec 1997) |
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| ventilation/perfusion lung imaging | <radiology> See: ventilation agents, perfusion agents, Biello-Siegel criteria (12 Dec 1998) |
| phantoms, imaging | Devices or objects in various imaging techniques used to visualise or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with X-ray or ultrasonic machines. (12 Dec 1998) |
| myocardial infarct imaging | <radiology> Tc-99m pyrophosphate (PYP) 20 mCi, peak abnormality 2-3 days, often falsely negative before 2 days, abnormal for 7-10 days, mechanism: calcium influx into ischemic cells, PYP incorporated into crystalline structure, analogous to hydroxyapatite see: nuclear cardiology (12 Dec 1998) |
| myocardial perfusion imaging | <radiology> (thallium scanning) thallium (Tl) 201, acts as potassium analog, dose 2.0 - 3.0 mCi at peak exercise, 4% of injected dose reaches myocardium, imaging: exercise (1-5 min), redistribution (3-4 hrs), views: anterior, LAO 45', left lateral, interpretation: normal, reversible abnormalitymost likely to be exercise-induced ischemia, nonreversible abnormalitymost likely to be prior myocardial infarction, reverse redistribution most likely to be normal areas wash out faster, lung activity most likely to be LV failure during exercise see also: dipyridamole test, nuclear cardiology (12 Dec 1998) |
| hepatobiliary imaging | <radiology> The hepatobiliary scan (Tc-99m DISIDA or MBF) is the initial procedure of choice to diagnose acute cholecystitis., Sensitivity 95% False negatives: acalculous cholecystitis, Specificity 95% False positives: non-fasting state, alcoholism, parenteral nutrition (TPN), acute pancreatitis, recent narcotic use, hepatocellular disease (12 Dec 1998) |
| high-resolution imaging | <technique> High Resolution Electron Microscopy is phase contrast microscopy of the atomic structure of materials. In most crystalline inorganic materials and a number of polymeric materials HREM allows the imaging of individual atomic columns. The images can frequently be interpreted in terms of the projected crystal potential, although it is often necessary to match the experimental images with those calculated from multislice algorithms. Allows direct measurement of lattice parameters, inspection of individual defects and grain orientation. (05 Aug 1998) |
| secondary electron imaging | <microscopy> Production of secondary electrons is very topography related. Due to their low energy, 5eV, only secondaries that are very near the surface (less than 10nm) can exit the sample and be examined. Any changes in topography in the sample that are larger than this sampling depth will change the yield of secondaries due to collection efficiencies. Collection of these electrons is aided by using a collector in conjunction with the secondary electron detector. The collector is a grid or mesh with a +100V potential applied to it which is placed in front of the detector, attracting the negatively charged secondary electrons to it which then pass through the grid-holes and into the detector to be counted. When a Secondary Electrons collide with the solid-state saemiconductor detector an electron-hole pairs are created which are then counted. This quantity is translated into a pixel intensity and displayed on the CRT, forming the image. (05 Aug 1998) |
| neoplasm: gallium imaging | <radiology> Useful: Hodgkin disease and histiocytic form of NHL poor sensitivity below the diaphragm, Burkitt lymphoma: almost 100% sensitivity, hepatoma: 90% sensitivity, melanoma: 90% sensitivity, leukaemia possibly useful: NHL: good for large and mediastinal lesions, nodal metastases from seminoma and embryonal cell carcinoma: 87% sensitivity, non-small cell lung CA: 85% sensitive not useful: head and neck, GI (especially adenocarcinoma), breast, gynaecological, kiddie tumours see: gallium: indications (12 Dec 1998) |
| dark field imaging | <microscopy> Using a single diffracted beam to form the image in a transmission electron microscope. This causes all regions of the specimen not of the same crystal structure and orientation as the region which produced the diffracted beam to be represented as very dark in the final image, allowing phase differentiation visually in the transmission electron microscope. (05 Aug 1998) |
| diagnostic imaging | Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy. (12 Dec 1998) |
| dipyridamole-thallium imaging | <radiology> Myocardial perfusion imaging for patients who cannot exercise, dipyridamole, potent coronary vasodilator, dose: 300 mg IV, side effects relieved by aminophyllin, thallium given when: symptomatic, HR increased 10 bpm, diastolic BP decreased 10 mm Hg, 45 min after PO dose (12 Dec 1998) |
| imaging | Radiological production of a clinical image using X-rays, ultrasound, computed tomography, magnetic resonance, radionuclide scanning, thermography, etc.; especially, cross-sectional imaging, such as ultrasonography, CT, or MRI. Origin: see image (05 Mar 2000) |
| imaging agents | Proteins developed to act as imaging or contrast agents for use with various types of bodyscanners. The proteins, usually antibodies, bind to specific tissue types, usually tumours, and allow the scanner to distinguish those tissues from the surrounding tissue very easily. (14 Nov 1997) |
| imaging department | The diagnostic radiology department. See: imaging, radiology. (05 Mar 2000) |
| magnetic resonance imaging |
MRI is a diagnostic procedure that uses a combination of a large magnet, radio frequencies, and a computer to produce detailed images of organs and structures within the body. Like a CT scan, MRI is performed in a special area of the hospital. It is often done to examine a baby's brain stem, spinal cord, and soft tissues. The baby will need a sedative medication so that he/she will be motionless for the exam.
출처: www.childrenshospital.org/cfapps/A2ZtopicDisplay.c...
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| magnetic resonance imaging |
a technique widely used in the diagnosis of central nervous system disorders and a variety of diseases. MRI is a non-invasive procedure and provides clear, vibrant images that enable physicians to diagnose and manage disease. This technique uses radio waves and a strong magnetic field to generate images of the body in 2-D and 3-D.
출처: www.chemi-tek.com/dic_lista.asp
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| magnetic resonance imaging |
A brain scanning technique that can reveal a contrast between normal and abnormal tissues. It is safe and painless, with no side effects or risks.
출처: naam-alzheimers.lle.org/Glossary.htm
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| magnetic resonance imaging |
An imaging technique that can be used to visualize any/all parts of the body. The scan is painless and does not involve radiation.
출처: www.ulf.org/resources/glossary.html
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| magnetic resonance imaging |
a non-invasive scanning technique that enables investigators to see and track MS lesions as they evolve.
출처: healthgate.partners.org/browsing/browseContent.asp
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