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- W2355220179 abstract "Background: To correlate the emphysema score for quantification of the overall extent of emphysema in both lungs by CT with physiologic fingings and to get more objective and simple method to assess the extent of emphysema. Method: Thin-section CT and pulmonary function test(PFT) were performed in 17 patients with emphysema (all males, mean age, 62 years). Emphysema score was obtained as percentage of emphysematous lung area, dividing the total area of the emphysema(voxels with attenuation value less than -880, -900, -920HU, respectively) by the overall area of both lungs(voxels with attenuation value less than -400HU) with highlighting voxels using Density mask program. Emphysema score was calculated from whole lung(ESV) and 5 representative scans(ESR) using Density mask, Visual emphysema score(ESV) was obtained by visual assessment from 5 representative scans. Correlation of these emphysema scores(ESW, ESR, ESV) and physiologic findings were performed, comparing the ESW with ESR and ESV. Results: ESW had correlation with DLCO(r=0.53-0.64) and (r=0.42-0.57) among PFT parameters. ESR had good correlation with ESW and with PFT parameters as well. ESV did not correlate with PFT parameters except DLCO. Conclusion: CT quantification of emphysema using density mask correlated well with physiologic findings. To assess the severity of emphysema, both ESW and ESR are more reliable than ESV, and ESR is recommended in routine practice as it is objective, simple and reliable." @default.
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- W2355220179 date "1998-01-01" @default.
- W2355220179 modified "2023-09-27" @default.
- W2355220179 title "Objective in Vivo Quantification of Emphysema by Thin-Section CT: Correlation with Physiologic Findings" @default.
- W2355220179 doi "https://doi.org/10.4046/trd.1998.45.5.992" @default.
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