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Radioisotope -- See Radioisotopes


Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
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Radioisotopes : Waltar, Alan E.  2004 1
Radioisotopes Diagnostic Use   2011 1
Radioisotopes Therapeutic Use   2011 1
Radioligand Assay Methods   2011 1
  Radiologic And Imaging Nursing -- 2 Related Mesh Subjects   2
 

Radiologic Physics -- See Health Physics


The science concerned with problems of radiation protection relevant to reducing or preventing radiation exposure, and the effects of ionizing radiation on humans and their environment.
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Radiology   3
 

Radiology Diagnostic X Ray -- See Radiography


Examination of any part of the body for diagnostic purposes by means of X-RAYS or GAMMA RAYS, recording the image on a sensitized surface (such as photographic film).
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Radionuclide -- See Radioisotopes


Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
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Radionuclide Tomography Computed -- See Tomography, Emission-Computed


Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
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Radionuclide Tomography Single Photon Emission Computed -- See Tomography, Emission-Computed, Single-Photon


A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
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Radionuclides -- See Radioisotopes


Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
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Radiopaque Media -- See Contrast Media


Substances used to allow enhanced visualization of tissues.
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Radiopharmaceutical -- See Radiopharmaceuticals


Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)
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Radiopharmaceuticals   6
Radiopharmaceuticals Administration And Dosage : Williams, Lawrence E.,  2011 1
Radiopharmaceuticals Chemical Synthesis   2012 1
Radiopharmaceuticals Chemistry   2003 1
Radiopharmaceuticals Diagnostic Use   3
Radiopharmaceuticals Handbooks   2012 1
Radiopharmaceuticals Therapeutic Use   3
 

Radioreceptor Assay -- See Radioligand Assay


Quantitative determination of receptor (binding) proteins in body fluids or tissue using radioactively labeled binding reagents (e.g., antibodies, intracellular receptors, plasma binders).
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Radiotherapy Dosage -- See Also Dose-Response Relationship, Radiation


The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation.
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Radiotherapy Esophageal Neoplasms   2010 1
Radiotherapy History : Leopold, Ellen,  2009 1
 

Radiotherapy Image Guided -- See Also Patient Positioning


Moving a patient into a specific position or POSTURE to facilitate examination, surgery, or for therapeutic purposes.
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Radiotherapy Lung Neoplasms   2010 1
Radiotherapy Methods   2007 1
Radiotherapy Neoplasms   2007 1
Radiotherapy Neoplasms Popular Works   2005 1
Radiotherapy Nursing   2007 1
 

Radiotherapy Targeted -- See Radiotherapy


The use of IONIZING RADIATION to treat malignant NEOPLASMS and some benign conditions.
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Radium History : Goldsmith, Barbara.  2005 1
Radium Juvenile Literature : Steinke, Ann E.,  1987 1
Radium Poisoning : Moore, Kate  2017 1
Radium Poisoning United States : Mullner, Ross.  1999 1
Rage   2
Railroad Trains : Weitzman, David,  1987 1
Railroad Tunnels English Channel Juvenile Literature : Bender, Lionel.  1990 1
Rako Susan : Rako, Susan.  2005 1
 

Rales -- See Respiratory Sounds


Noises, normal and abnormal, heard on auscultation over any part of the RESPIRATORY TRACT.
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Ramakrishnan Venki 1952 : Ramakrishnan, Venki,  2018 1
 

Raman Spectroscopy -- See Spectrum Analysis, Raman


Analysis of the intensity of Raman scattering of monochromatic light as a function of frequency of the scattered light.
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Ramanujan Aiyangar Srinivasa 1887 1920 : Kanigel, Robert.  1991 1
 

Ramps -- See Architectural Accessibility


Designs for approaching areas inside or outside facilities.
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Ramsay Hunt Paralysis Syndrome -- See Parkinsonian Disorders


A group of disorders which feature impaired motor control characterized by bradykinesia, MUSCLE RIGIDITY; TREMOR; and postural instability. Parkinsonian diseases are generally divided into primary parkinsonism (see PARKINSON DISEASE), secondary parkinsonism (see PARKINSON DISEASE, SECONDARY) and inherited forms. These conditions are associated with dysfunction of dopaminergic or closely related motor integration neuronal pathways in the BASAL GANGLIA.
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Ranavirus   2015 1
  Random Amplified Polymorphic Dna Technique -- 2 Related Mesh Subjects   2
Randomized Controlled Trials As Topic Methods   2015 1
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