Clinical Application Of Chest High-resolution Ct Scan Anatomy Of Basic Research And A Number Of Diseases

High-resolution CT (HRCT) is a late development of CP technology in the study of pulmonary pathology, especialy diffuse interstitial diseases and many reports have been published in the literature since 1985. Owing to the paucity of report in this respect in our country herein is the study of HRCT image of the pulmonary fine structures and diffuse interstitial diseases done by us. The diseases studied in particular were idiopathic pulmonary fibrosis, radiographic irregular small shadow type anthracosis and chronic bronchitis as sometimes the differential diagnoses between them are difficult in chest radiography.Correlation of bronchogram with measurements and CT examination of the bronchial and vascular casts showed; (1)bronchi and accompanying arteries in the inner zone of the lung field are the 2nd(lobe) and 3rd(segment) generations with trunk 1.5-2.5cm in length and 5-10mm in diameter, (2)bronchi and accompanying arteries in the middle zone are the 3rd(segment), 4th and 5th(sub-segment) generations with trunk 1-1.5 cm in length and 2-6mm in diameter, (3)in the outer zone are bronchioles and accompanying arteries of the 6th generations onto the very periphery, with length less than Icm and less than 1mm in diameter, (4)the terminal bronchioles and arteries are 2-4mm in length, less than 0.5mm in diameter, (5)pulmonary veins are distributed between segments, lobules and acini. Their diameters are similar to the arteries of the same order.Investigation into the radiographic and HRCT pictures of the inflated lung specimens and the whole lung sections confirmed that the normal interlobular septa are better developed in the periphery than the interior. They are usually 5-l9mm in length and 0.1-0.2mm thick.. Furthermore, correlative study of lung specimens and...