Figure 8a. NSIP in a 60-year-old woman with mild dyspnea and fatigue. (a) High-resolution CT image of the lower lungs shows bilateral subpleural ground-glass opacities (arrowhead) and irregular linear opacities (arrow). The patient received corticosteroid treatment. (b) Follow-up CT image obtained 6 months later shows improvement, with partial resolution of the ground-glass opacities (arrowhead) and linear opacities (arrow).