A 6-year-old child develops chronic cough, wheezing, and exercise intolerance following a severe, culture-proven adenovirus pneumonia hospitalization one year ago. Pulmonary function tests show a fixed obstructive defect. A high-resolution computed tomography (HRCT) of the chest is performed to evaluate for post-infectious lung disease. Which constellation of findings on HRCT is characteristic of bronchiolitis obliterans and can often make a lung biopsy unnecessary?