Fig. 2

Measurement of the pulmonary lesion area and radiodensity. a–d The case of a 22-year-old female patient diagnosed with cryptococcal granuloma through endobronchial ultrasound-guided trans-bronchial needle aspiration (EBUS-TBNA) is presented. The patient exhibited multiple nodular and patchy lesions in the right lung a–c. The largest lesion was delineated with a red line in panel d, where its radiodensity (-173 HU) and area (14.12 cm²) were measured. e, f A 50-year-old female patient with multiple nodules in the right lower lobe and a serum CrAg titre of 1:5 was examined. The largest lesion was identified and its radiodensity (− 165 HU) and area (0.79 cm²) were measured using the same method as before. g, h A 44-year-old male patient with a serum CrAg titre of 1:2 and a mass lesion in the right lower lobe is described. The largest cross-sectional area of the lesion was marked by red line in panel h, where its radiodensity (− 13 HU) and area (5.06 cm²) were measured