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Titolo:
Comparison of low attenuation areas on computed tomographic scans between inner and outer segments of the lung in patients with chronic obstructive pulmonary disease: incidence and contribution to lung function
Autore:
Nakano, Y; Sakai, H; Muro, S; Hirai, T; Oku, Y; Nishimura, K; Mishima, M;
Indirizzi:
Kyoto Univ, Dept Expt Pathol, Inst Frontier Med Sci, Kyoto 6068397, Japan Kyoto Univ Kyoto Japan 6068397 st Frontier Med Sci, Kyoto 6068397, Japan Kyotopaniv, Dept Med Syst Control, Inst Frontier Med Sci, Kyoto 6068397, Ja Kyoto Univ Kyoto Japan 6068397 Inst Frontier Med Sci, Kyoto 6068397, Ja Kyoto Univ, Grad Sch Med, Dept Resp Med, Kyoto, Japan Kyoto Univ Kyoto Japan Univ, Grad Sch Med, Dept Resp Med, Kyoto, Japan McGill Univ, Meakins Christie Labs, Montreal, PQ, Canada McGill Univ Montreal PQ Canada akins Christie Labs, Montreal, PQ, Canada Kyoto Univ, Dept Phys Therapeut, Kyoto 606, Japan Kyoto Univ Kyoto Japan606 o Univ, Dept Phys Therapeut, Kyoto 606, Japan
Titolo Testata:
THORAX
fascicolo: 5, volume: 54, anno: 1999,
pagine: 384 - 389
SICI:
0040-6376(199905)54:5<384:COLAAO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE CT; REGIONAL DISTRIBUTION; VERTICAL GRADIENTS; FUNCTION TESTS; DENSITY MASK; EMPHYSEMA; MORPHOMETRY; DIAGNOSIS;
Keywords:
emphysema; regional distribution; computed tomography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Nakano, Y Kyotoo,niv, Dept Expt Pathol, Inst Frontier Med Sci, 53 Shogoin Kawahara Ch Kyoto Univ 53 Shogoin Kawahara Cho Kyoto Japan 6068397 ahara Ch
Citazione:
Y. Nakano et al., "Comparison of low attenuation areas on computed tomographic scans between inner and outer segments of the lung in patients with chronic obstructive pulmonary disease: incidence and contribution to lung function", THORAX, 54(5), 1999, pp. 384-389

Abstract

Background-The low attenuation areas on computed tomographic (CT) scans have been reported to represent emphysematous changes of the lung. However, the regional distribution of emphysema between the inner and outer segments of the lung has not been adequately studied. In this study the regional distribution of low attenuation areas has been compared by quantitative CT analysis and the contribution of the regional distribution to pulmonary function tests evaluated in patients with chronic obstructive pulmonary disease (COPD). Methods-Chest CT images and the results of pulmonary function tests were obtained from 73 patients with COPD. The lung images were divided into innerand outer segments in the upper (cranial), middle, and lower (caudal) sections. The percentage ratio of low attenuation area to corresponding lung area (LAA%) was then calculated. The LAA% of each segment was also compared with the results of pulmonary function tests. Results-The mean (SD) LAA% of the inner segment was 39.1 (18.5) compared with 28.1 (13.2) for the outer segment (p<0.0001). Linear and multiple regression analyses revealed that airflow limitation is closely correlated with the inner segment LAA% of the lower lung. In contrast, the carbon monoxide transfer factor is closely correlated with the inner segment LAA% of the upper lung. Conclusion-Low attenuation areas on CT scans are more often found in the inner segment of the lung than in the outer segment, and the contribution ofthe inner segment to pulmonary function tests may be greater than the outer segment.

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Documento generato il 18/01/20 alle ore 13:29:12