Abstract
Introduction
Interstitial lung disease are a set of pulmonary disorders charecterised by inflammation and fibrosis of gas exchanging portion of the lung and diffuse abnormalities on lung radio graph. It is now generally conceded that computed tomography (CT) is superior to chest radiography in assessing the presence and extent of parenchymal abnormalities. The contribution of CT to the evaluation of interstitial and parenchymal lung diseases has been investigated, with special emphasis on high-resolution CT (HRCT)(1-10). Advances in CT technology now allow detailed imaging of the pulmonary parenchyma, and respective indications for conventional CT and HRCT are being defined. Performance of HRCT on state-of-the-art CT scanners requires modification of technical parameters, with special emphasis on section thickness and the reconstruction algorithm to enhance visualization of fine pulmonary parenchymal detail(1,7,8). HRCT has been optimized for the evaluation of parenchymal diseases and may permit location of disease processes within lobules.
References
- Mayo JR, Webb WR, Gould R, et al. Highresolution CT of the lungs: optimal approach. Radiology 1987; 163:507-510.
- Murata K, Khan A, Herman PG. Pulmo- nary parenchymal disease: evaluation with high-resolution CT. Radiology 1989; 170: 629-635.
- Stein MK, MayoJ, Muller N, Aberle D, Webb WR, Gamsu G. Pulmonary lymphangitic spread of carcinoma: appearance on CT scans. Radiology 1987; 162:371-375.
- Munk PL, Muller N, Miller RR, Ostrow DN. Pulmonary lymphangiticcarcino-matosis: CT and pathologic findings. Radiology 1988; 166:705-709.
- Aberle D, Gamsu G, Ray CS, Feurstein IM. Asbestos-related pleural and parenchymal fibrosis: detection with high-resolution CT. Radiology 1988; 166:729-734.
- Lynch DA, Gamsu G, Ray CS, Aberle DR. Asbestos-related focal masses: manifesta-tions on conventional and high-resolution CT scans. Radiology 1988; 169:603-607.
- Murata K, Khan A, Rojas KA, Herman PG. Optimization of computed tomography technique to demonstrate the fine structure of the lung. Invest Radiol 1988; 23:170-175.
- Gamsu G, Klein J. High-resolution CT of diffuse lung disease. ClinRadiol 1989; 40: 554-556.
- Staples CA, Gamsu G, Sue Ray C, Webb WR. High-resolution computed tomography and lung function in asbestos-exposed workers with normal chest radiographs. Am Rev Respir Dis 1989; 139:1502-1508.
- Muller NL, Mawson JB, Mathieson JR. Abboud R, Ostrow DN, Champion P. Sarcoi- dosis: correlation of extent of disease at CT with clinical, functional, and radiographic findings. Radiology 1989; 171:613-618.
- Guidelines for the use of ILO international classification of radiographs of pneumoco- niosis. Revised ed. International Labour Office occupational safety and health series no. 22 (rev 80). Geneva: International La- bour Office, 1980.
- Remy-Jardin M, Beuscart R, Sault MC, Mar- quette CH, Remy J. Subpleural-micronodules in diffuse mifitrative lung diseases: evaluation with thin-section CT scans. Radiology 1990; 177:133-139.
- Remy-Jardin M, Degreef JM, Beuscart R, Voisin C, Remy J. Coal worker’s pneumo- coniosis: CT assessment in exposed work- ers and correlation with radiographic findings. Radiology 1990; 177:363-371.
- Zwirewich CV, Terriff B, Muller N. High spatial frequency (bone) algorithm improves quality of standard CT of the tho- rax. AJR 1989; 153:1169-1173.
Corresponding Author
Dr Vijay Prabhu.R
Chettinad Hospital and research Institute, Chennai, India