title: Mixed infiltrative and obstructive disease on high-resolution CT: differential diagnosis and functional correlates in a consecutive series.
abstract: Fourteen of 400 consecutive patients having high-resolution computed tomography (HRCT) with expiratory images showed findings of infiltrative lung disease on inspiratory HRCT and air trapping on expiratory CT. Diagnoses included hypersensitivity pneumonitis, sarcoidosis, atypical infection, and pulmonary edema. The extent of infiltrative abnormalities and air trapping were correlated with pulmonary function tests (PFT) in 11 patients. PFT indicated a mixed pattern in five, an obstructive pattern in three, and a restrictive pattern in three. Forced expiratory volume (FEV) in 1 second/forced vital capacity (FVC) correlated significantly with the extent of air-trapping (r = 0.60; p = 0.05). The extent of infiltrative abnormalities correlated significantly and negatively with forced vital capacity (r = -0.82, p = 0.002), FEV1 (r = -0.59, p = 0.05), total lung capacity (TLC) (r = -0.67, p = 0.05), and DLCO (r = -0.75, p = 0.02). Findings of lung infiltration on inspiratory HRCT scans and air trapping on expiratory CT correlated respectively with PFT measures of restrictive and obstructive lung disease.
authors: Department of Radiology, Holy Family Hospital, Catholic University of Korea, Kyunggi-Do.
authors: M H
authors: MH
authors: Chung
authors: K J
authors: KJ
authors: Edinburgh
authors: E M
authors: EM
authors: Webb
authors: M
authors: M
authors: McCowin
authors: W R
authors: WR
authors: Webb
mesh_terms: D000328:Adult; D000368:Aged; D000542:Alveolitis, Extrinsic Allergic / Q000000981:diagnostic imaging / Q000503:physiopathology; D005260:Female; D006801:Humans; D001239:Inhalation / Q000502:physiology; D008173:Lung Diseases, Obstructive / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000000981:diagnostic imaging / Q000503:physiopathology; D011654:Pulmonary Edema / Q000000981:diagnostic imaging / Q000503:physiopathology; D012123:Pulmonary Ventilation / Q000502:physiology; D012129:Respiratory Function Tests; D012507:Sarcoidosis / Q000000981:diagnostic imaging / Q000503:physiopathology; D014057:Tomography, X-Ray Computed