Abstract The red edge band is considered as one of the diagnosable characteristics green plants, but large-scale remote sensing retrieval fractional vegetation coverage (FVC) based on still rare. To explore application in estimation FVC, this study proposed a new index (normalized difference index, RENDVI) two bands Chinese GaoFen-6 satellite (GF-6). FVC estimated by using three indices (NDVI, ...

Correspondence Correspondence to: Elie A. Akl, MD, PhD, MPH, State University of New York at Buffalo, ECMC CC-142, 462 Grider St, Buffalo, NY 14215; e-mail : [email protected] © 2011 American College of Chest Physicians. Reproduction of this article is prohibited without written permission from the American College of Chest Physicians ( http :// www . chestpubs . org / site / misc / reprints ...

Cigarette smoking results in the accumulation of iron both systemically and locally, in the lung thereby causing imbalance in iron homeostasis. This disruption in iron homeostasis can be associated with oxidative stress and consequent tissue injury. Therefore, in this study, we tested the association between iron homeostasis and airway obstruction by examining a large cohort of smokers and non-...

I would like to thank Pedone et al 1 for their recent article in CHEST (April 2012). The article presented data on the association between pulmonary restriction, properly defi ned as having a total lung capacity (TLC) below the fi fth percentile of the reference population (lower limit of normal [LLN]), and all-cause mortality. As the authors correctly pointed out, defi ning restriction as FVC ...

OBJECTIVE To investigate the presence of airway obstruction by determining the FEV1/FVC and FEV1/slow vital capacity (SVC) ratios. METHODS This was a quantitative, retrospective cross-sectional study. The sample comprised 1,084 individuals who underwent spirometry and plethysmography in a central hospital in Lisbon, Portugal. The study sample was stratified into six groups, by pulmonary funct...

It is common practice to use a forced expiratory volume in one second (FEV(1))/ forced vital capacity (FVC) ratio of <70% as evidence of airflow obstruction. As the FEV(1)/FVC ratio falls with age, the lower limit of normal range (LLN), defined as the bottom 5% in a health reference population, of FEV(1)/FVC ratio has been suggested as a better index to reduce over-diagnosis of chronic obstruct...

BACKGROUND We hypothesized that fibrinogen, as a marker of chronic inflammation, is inversely associated with forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV(1)) in healthy persons. METHODS The CARDIA cohort started in 1985 and included black and white men and women, aged 18-30, from the general population. Spirometry testing conducted at years 5 and 10 [FVC, FEV(1), and ...

BACKGROUND Chronic obstructive pulmonary diseases (COPD) have been defined by the Global Initiative for Chronic Obstructive Lung Disease (GOLD) as irreversible conditions which are diagnosed by fixed cut-off points of FEV1/FVC. OBJECTIVE The aim of this study was to determine the cut-off points for FEV1/FEV6 ratio and FEV6 as alternatives for FEV1/FVC and FVC in detection of airway obstructio...