FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2186769307> ?p ?o ?g. }

• W2186769307 abstract "We have evaluated a method for absolute in vivo quantification of 99m Tc-sestamibi uptake in a porcine model of myocardial perfusion. Methods: Correlated CT and radionuclide images were obtained from eight adult pigs using a combined CT‐ SPECT imaging system. In each case, the CT image is used to generate an object-specific attenuation map that is incorporated into an iterative algorithm for reconstruction and attenuation correction of the radionuclide image. Anatomic information available from the correlated CT image is used to correct the radionuclide image for partial-volume errors by mathematically modeling the radionuclide imaging process. A volume of interest, or template, that approximates the geometric extent of the myocardium is defined from the CT image. Once defined, the template is assigned unit activity and is mathematically projected using a realistic physical model of the radionuclide imaging process including nonideal collimation and object-specific attenuation. The template is then reconstructed from these projections to obtain a pixel-by-pixel partial-volume correction for the myocardium in the radionuclide image. The CT image is also used to delimit the anatomic boundaries of the myocardium for quantification of the radionuclide images. The pixel intensities in the corrected radionuclide image are calibrated in units of activity concentration (MBq/g) and compared with the ex vivo activity concentration measured directly from the excised myocardium. Results: Without corrections, the measured in vivo activity concentration in the porcine myocardium was only 10% of the true value. Correcting for object-specific attenuation improved the accuracy of this measurement but resulted in values that were still only 42% of the true value. By correcting for both attenuation and partial-volume errors, we were able to achieve absolute quantification with an accuracy error near 10%. Conclusion: We have shown that, by applying object-specific attenuation corrections and suitable partial-volume corrections, absolute regional activity concentration can be measured accurately in the porcine myocardium." @default.
• W2186769307 created "2016-06-24" @default.
• W2186769307 creator A5031696591 @default.
• W2186769307 creator A5051508940 @default.
• W2186769307 creator A5054439566 @default.
• W2186769307 creator A5062233663 @default.
• W2186769307 creator A5072071553 @default.
• W2186769307 creator A5087180338 @default.
• W2186769307 date "2001-01-01" @default.
• W2186769307 modified "2023-09-27" @default.
• W2186769307 title "Experimental Validation in a Porcine Model" @default.
• W2186769307 cites W1574421269 @default.
• W2186769307 cites W1868046877 @default.
• W2186769307 cites W1912212332 @default.
• W2186769307 cites W1973675464 @default.
• W2186769307 cites W2001277786 @default.
• W2186769307 cites W2033932611 @default.
• W2186769307 cites W2035530517 @default.
• W2186769307 cites W2050633524 @default.
• W2186769307 cites W2054765812 @default.
• W2186769307 cites W2069629287 @default.
• W2186769307 cites W2074210823 @default.
• W2186769307 cites W2080848024 @default.
• W2186769307 cites W2085288403 @default.
• W2186769307 cites W2095435427 @default.
• W2186769307 cites W2097506222 @default.
• W2186769307 cites W2103796724 @default.
• W2186769307 cites W2120389226 @default.
• W2186769307 cites W2143661967 @default.
• W2186769307 cites W2147492557 @default.
• W2186769307 cites W2152799813 @default.
• W2186769307 cites W2153054538 @default.
• W2186769307 cites W2165610094 @default.
• W2186769307 cites W2187533210 @default.
• W2186769307 cites W2275739917 @default.
• W2186769307 cites W2344689276 @default.
• W2186769307 cites W2411842550 @default.
• W2186769307 hasPublicationYear "2001" @default.
• W2186769307 type Work @default.
• W2186769307 sameAs 2186769307 @default.
• W2186769307 citedByCount "0" @default.
• W2186769307 crossrefType "journal-article" @default.
• W2186769307 hasAuthorship W2186769307A5031696591 @default.
• W2186769307 hasAuthorship W2186769307A5051508940 @default.
• W2186769307 hasAuthorship W2186769307A5054439566 @default.
• W2186769307 hasAuthorship W2186769307A5062233663 @default.
• W2186769307 hasAuthorship W2186769307A5072071553 @default.
• W2186769307 hasAuthorship W2186769307A5087180338 @default.
• W2186769307 hasConcept C120665830 @default.
• W2186769307 hasConcept C121332964 @default.
• W2186769307 hasConcept C123688308 @default.
• W2186769307 hasConcept C136229726 @default.
• W2186769307 hasConcept C141379421 @default.
• W2186769307 hasConcept C158973077 @default.
• W2186769307 hasConcept C160633673 @default.
• W2186769307 hasConcept C184652730 @default.
• W2186769307 hasConcept C2775842073 @default.
• W2186769307 hasConcept C2989005 @default.
• W2186769307 hasConcept C31972630 @default.
• W2186769307 hasConcept C41008148 @default.
• W2186769307 hasConcept C62520636 @default.
• W2186769307 hasConcept C71924100 @default.
• W2186769307 hasConcept C82233179 @default.
• W2186769307 hasConceptScore W2186769307C120665830 @default.
• W2186769307 hasConceptScore W2186769307C121332964 @default.
• W2186769307 hasConceptScore W2186769307C123688308 @default.
• W2186769307 hasConceptScore W2186769307C136229726 @default.
• W2186769307 hasConceptScore W2186769307C141379421 @default.
• W2186769307 hasConceptScore W2186769307C158973077 @default.
• W2186769307 hasConceptScore W2186769307C160633673 @default.
• W2186769307 hasConceptScore W2186769307C184652730 @default.
• W2186769307 hasConceptScore W2186769307C2775842073 @default.
• W2186769307 hasConceptScore W2186769307C2989005 @default.
• W2186769307 hasConceptScore W2186769307C31972630 @default.
• W2186769307 hasConceptScore W2186769307C41008148 @default.
• W2186769307 hasConceptScore W2186769307C62520636 @default.
• W2186769307 hasConceptScore W2186769307C71924100 @default.
• W2186769307 hasConceptScore W2186769307C82233179 @default.
• W2186769307 hasLocation W21867693071 @default.
• W2186769307 hasOpenAccess W2186769307 @default.
• W2186769307 hasPrimaryLocation W21867693071 @default.
• W2186769307 hasRelatedWork W1989074032 @default.
• W2186769307 hasRelatedWork W2008147199 @default.
• W2186769307 hasRelatedWork W2028735777 @default.
• W2186769307 hasRelatedWork W2037710918 @default.
• W2186769307 hasRelatedWork W2062198638 @default.
• W2186769307 hasRelatedWork W2149274713 @default.
• W2186769307 hasRelatedWork W2293310219 @default.
• W2186769307 hasRelatedWork W2566583287 @default.
• W2186769307 hasRelatedWork W2603534404 @default.
• W2186769307 hasRelatedWork W2736893108 @default.
• W2186769307 hasRelatedWork W2769504525 @default.
• W2186769307 hasRelatedWork W2776645916 @default.
• W2186769307 hasRelatedWork W2804191678 @default.
• W2186769307 hasRelatedWork W341026254 @default.
• W2186769307 hasRelatedWork W2755633336 @default.
• W2186769307 hasRelatedWork W2825166073 @default.
• W2186769307 hasRelatedWork W2829768362 @default.
• W2186769307 hasRelatedWork W2962457484 @default.
• W2186769307 hasRelatedWork W2985246160 @default.

• next