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Descriptor English: Tomography, Emission-Computed, Single-Photon
Descriptor Spanish: Tomografía Computarizada de Emisión de Fotón Único
Descriptor tomografía computarizada por emisión de fotón único
Entry term(s) SPECT
TAC de emisión monofotónica
TAC por emisión de fotón único
TAC por emisión monofotónica
escaneo SPECT
tomografía SPECT
Scope note: Método de tomografía computarizada que utiliza radionúclidos que emiten un solo fotón de una energía dada. La cámara gira 180 o 360 grados alrededor del paciente para capturar las imágenes en múltiples posiciones a lo largo del arco. El computador se usa entonces para reconstruir las imágenes transaxiales, sagitales, y coronales a partir de la distribución tridimensional de los radionúclidos en el órgano. Las ventajas del SPECT son que puede utilizarse para observar procesos bioquímicos y fisiológicos así como el tamaño y volumen del órgano. La desventaja es que, a diferencia de la tomografía de emisión de positrones donde se produce la destrucción de electrones positivos en la emisión de dos fotones a 180 grados uno del otro, el SPECT requiere de la colimación física para alinear los fotones, lo que produce pérdida de muchos de los fotones disponibles y, por tanto, hay degradación de la imagen.
Descriptor Portuguese: Tomografia Computadorizada de Emissão de Fóton Único
Descriptor French: Tomographie par émission monophotonique
Entry term(s): 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
Tree number(s): 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
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D015899
Scope note: 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.
Allowable Qualifiers: AE adverse effects
CL classification
EC economics
ES ethics
HI history
IS instrumentation
MO mortality
MT methods
NU nursing
PX psychology
SN statistics & numerical data
ST standards
TD trends
VE veterinary
Previous Indexing: Tomography, Emission-Computed (1980-1989)
Tomography, X-Ray Computed (1977-1979)
Public MeSH Note: 90; was SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY & SPECT see TOMOGRAPHY, EMISSION-COMPUTED 1989
Online Note: use TOMOGRAPHY, EMISSION-COMPUTED to search SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY & SPECT 1989
History Note: 90; was SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY & SPECT see TOMOGRAPHY, EMISSION-COMPUTED 1989
Entry Version: CT SINGLE PHOTON EMISS
DeCS ID: 24895
Unique ID: D015899
NLM Classification: WN 206
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1990/01/01
Date of Entry: 1989/05/16
Revision Date: 2008/07/08
Tomography, Emission-Computed, Single-Photon - Preferred
Concept UI M0024331
Scope note 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.
Preferred term Tomography, Emission-Computed, Single-Photon
Entry term(s) 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



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