Attenuation coefficients of various body tissues, fluids, and lesions at photon energies of 18 to 136 keV.
Identifieur interne : 000879 ( PubMed/Curation ); précédent : 000878; suivant : 000880Attenuation coefficients of various body tissues, fluids, and lesions at photon energies of 18 to 136 keV.
Auteurs : M E Phelps ; E J Hoffman ; M M Ter-PogossianSource :
- Radiology [ 0033-8419 ] ; 1975.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- Americium, Animals, Brain Neoplasms (radiography), Cerebrospinal Fluid (radiography), Cobalt Radioisotopes, Computers, Erythrocytes (radiography), Gadolinium, Haplorhini, Humans, Iodine Radioisotopes, Macaca mulatta, Plasma (radiography), Radioisotopes, Radionuclide Imaging, Thulium, Tomography, X-Ray.
- MESH :
- chemical : Americium, Cobalt Radioisotopes, Gadolinium, Iodine Radioisotopes, Radioisotopes, Thulium.
- radiography : Brain Neoplasms, Cerebrospinal Fluid, Erythrocytes, Plasma.
- Animals, Computers, Haplorhini, Humans, Macaca mulatta, Radionuclide Imaging, Tomography, X-Ray.
Abstract
Radioactive sources of 241Am, 125I, 153Gd, 170Tm, and 57Co were used to measure the attenuation coefficient muL of various body tissues (gray and white matter, fat, liver, pancreas, and muscle), fluids (water, cerebrospinal fluid, plasma, and red blood cells), and cerebral lesions (blood clots, edematous brain tissue, and eight types of brain tumors) at 16 different energies in the range 18-136 keV. Experimental accuracy was about 0.1-0.3% and 0.2-0.4% in the energy ranges 18-60 keV and 60-136 keV, respectively. Comparisons with values determined in vivo and in vitro with an EMI scanner showed excellent agreement. It is hoped that these findings will provide a better understanding of the photon interactions at the sensitivity level of computed tomography.
DOI: 10.1148/117.3.573
PubMed: 810827
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<author><name sortKey="Ter Pogossian, M M" sort="Ter Pogossian, M M" uniqKey="Ter Pogossian M" first="M M" last="Ter-Pogossian">M M Ter-Pogossian</name>
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<term>Computers</term>
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<term>Humans</term>
<term>Iodine Radioisotopes</term>
<term>Macaca mulatta</term>
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<term>Radioisotopes</term>
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<term>Liquide cérébrospinal ()</term>
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<term>Plasma sanguin ()</term>
<term>Radio-isotopes</term>
<term>Radio-isotopes de l'iode</term>
<term>Radio-isotopes du cobalt</term>
<term>Scintigraphie</term>
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<term>Tumeurs du cerveau ()</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Américium</term>
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<term>Gadolinium</term>
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<term>Humains</term>
<term>Liquide cérébrospinal</term>
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<term>Plasma sanguin</term>
<term>Radio-isotopes</term>
<term>Radio-isotopes de l'iode</term>
<term>Radio-isotopes du cobalt</term>
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<front><div type="abstract" xml:lang="en">Radioactive sources of 241Am, 125I, 153Gd, 170Tm, and 57Co were used to measure the attenuation coefficient muL of various body tissues (gray and white matter, fat, liver, pancreas, and muscle), fluids (water, cerebrospinal fluid, plasma, and red blood cells), and cerebral lesions (blood clots, edematous brain tissue, and eight types of brain tumors) at 16 different energies in the range 18-136 keV. Experimental accuracy was about 0.1-0.3% and 0.2-0.4% in the energy ranges 18-60 keV and 60-136 keV, respectively. Comparisons with values determined in vivo and in vitro with an EMI scanner showed excellent agreement. It is hoped that these findings will provide a better understanding of the photon interactions at the sensitivity level of computed tomography.</div>
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<Abstract><AbstractText>Radioactive sources of 241Am, 125I, 153Gd, 170Tm, and 57Co were used to measure the attenuation coefficient muL of various body tissues (gray and white matter, fat, liver, pancreas, and muscle), fluids (water, cerebrospinal fluid, plasma, and red blood cells), and cerebral lesions (blood clots, edematous brain tissue, and eight types of brain tumors) at 16 different energies in the range 18-136 keV. Experimental accuracy was about 0.1-0.3% and 0.2-0.4% in the energy ranges 18-60 keV and 60-136 keV, respectively. Comparisons with values determined in vivo and in vitro with an EMI scanner showed excellent agreement. It is hoped that these findings will provide a better understanding of the photon interactions at the sensitivity level of computed tomography.</AbstractText>
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