Purpose : To analyse the radiographic and HRCT findings of pulmonary sarcoidosis and to evaluate the diagnostic usefulness of HRCT Materials and Methods : Initial chest radiographs (n=14) and HRCT scans (n=14), and a follow up HRCT scan (n=1) from 14 patients (5 men and 9 women; median age, 38 Years) with biopsy proven pulmonary sarcoidosis were analyzed. Results : On initial chest radiographs, they showed pulmonary lesions were seen predominantly in the middle, upper and lower lung zones in four, two and one patient, respectively. Patterns of lesions were reticulonodular opacities (n=4), air-space (n=2), honeycombing(n=1), macronodule(n=1), and cavitary nodule (n=1). In all patients, HRCT scans demonstrated both pulmonary lesions and intrathoracic lymphadenopathy. Pulmonary lesions were seen predominantly in the middle, lower and upper lung zones in nine, three and two patients, and in the posterior and anterior lung zones in eight and four patients repectively. Lesions were predominantly micronodules, with perilymphatic distribution (n=12), macronodules with air-bronchogram (n=1), cavitary macronodules (n=1), ground-glass opacity (n=5), consolidation (n=2), and irregular lines (n=8).Conclusion : Reticulonodular lesions in the middle lung zone were seen on radiograph, while the most common HRCT finding was micronodular lesions with perilymhpatic distribution. HRCT is much more sensitive than chest radiograph for the detection of both pulmonary lesions and lymphadenopathy; this modality revealed micronodules which were invisible on chest radiographs.