Pesquisa sobre: TOMOGRAPHY, EMISSION-COMPUTED, SINGLE-PHOTON 
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Descritor Inglês:   Tomography, Emission-Computed, Single-Photon 
Descritor Espanhol:   Tomografía Computarizada de Emisión de Fotón Único 
Descritor Português:   Tomografia Computadorizada de Emissão de Fóton Único 
Sinônimos Inglês:   CAT Scan, Single Photon Emission
CAT Scan, Single-Photon Emission
CT Scan, Single Photon Emission
CT Scan, Single-Photon Emission
Emission-Computed Tomography, Single-Photon
Radionuclide Tomography, Single Photon Emission Computed
Radionuclide Tomography, Single-Photon Emission-Computed
SPECT
Single Photon Emission CT Scan
Single Photon Emission Computed Tomography
Single Photon Emission Computer Assisted Tomography
Single Photon Emission Computerized Tomography
Single-Photon Emission CT Scan
Single-Photon Emission Computer-Assisted Tomography
Single-Photon Emission Computerized Tomography
Single-Photon Emission-Computed Tomography
Tomography, Single-Photon Emission-Computed
Tomography, Single-Photon, Emission-Computed  
Categoria:   E01.370.350.350.800.800
E01.370.350.600.350.800.800
E01.370.350.710.800.800
E01.370.350.825.800.800
E01.370.384.730.800.800
Definição Inglês:   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. 
Nota Histórica Inglês:   90; was SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY & SPECT see TOMOGRAPHY, EMISSION-COMPUTED 1989 
Qualificadores Permitidos Inglês:  
AE adverse effects CL classification
EC economics ES ethics
HI history IS instrumentation
MT methods MO mortality
NU nursing PX psychology
ST standards SN statistics & numerical data
TD trends VE veterinary
Número do Registro:   24895 
Identificador Único:   D015899 

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