Semiautomatic Segmentation of Ventilated Airspaces in Healthy and Asthmatic Subjects Using Hyperpolarized ³He MRI

Figure 6

Scatter plot of ventilated lung volumes versus measurements of FEV₁ (a) and FVC (b). Comparison to both measurements yield positive trend lines with strong association to FVC (𝑅=0.93, 𝑃=0.0035) and FEV₁ (𝑅=0.84, 𝑃<0.0001).

(a)  

(b)