Figure 1.

Left panel: composite ^99mTc-sestamibi elimination curves in smokers and nonsmokers with healthy lungs and patients with chronic obstructive pulmonary disease (COPD). Error bars are the standard errors. Note that over the initial 5 min of ^99mTc-sestamibi elimination, the mean curves for smokers () and nonsmokers (•) are superimposed and less steep than that for COPD patients (). Right panel: ^99mTc-sestamibi elimination rates in the three individual patients with interstitial lung disease ()