HRCT Protocol, Secondary Pulmonary Lobule, and Distribution Analysis
Learn thin-section HRCT technique, inspiratory and expiratory series, secondary lobular anatomy, and distribution-based interpretation.
High-resolution chest CT is not merely a reconstruction label. It combines thin sections, high spatial resolution, and selected inspiratory, expiratory, or prone images according to the clinical question. Pattern analysis uses location within the secondary pulmonary lobule together with craniocaudal and central-peripheral predominance.
Volumetric inspiratory imaging is the basis of most examinations. Expiratory images can reveal air trapping, while prone images can separate dependent posterior density from true interstitial abnormality. Additional series are chosen for the question rather than acquired automatically, with radiation exposure considered.