In search of optimum chest radiography techniques.

A nation-wide study of chest radiography in Sweden had previously revealed a large variation in the physical and technical factors involved, in particular the radiation dose. In this study the image quality could not be assessed unambiguously. The aim of the present study was to try to establish a correlation between visual grading of radiographs and physical and technical factors in order to find the optimum chest X-ray system. The physical and technical performance of 24 chest units was evaluated. Radiographs were taken of an anthropomorphic chest phantom supplied with test structures simulating various pathologies. Image quality was assessed by visual grading analysis of the radiographs. The physical and technical parameters of the units rated best were used to exemplify good radiographic practice. The results were in agreement with the recommendations issued by the Commission of the European Communities (CEC). It was also shown that low radiation dose is compatible with high-quality radiographic imaging of the chest.

[1]  John A. Swets,et al.  Evaluation of diagnostic systems : methods from signal detection theory , 1982 .

[2]  P. Butler,et al.  Chest radiography: a survey of techniques and exposure levels currently used. , 1985, Radiology.

[3]  L J Kool,et al.  AMBER: a scanning multiple-beam equalization system for chest radiography. , 1988, Radiology.

[4]  C A Kelsey,et al.  Factors affecting perception of pulmonary lesions. , 1983, Radiologic clinics of North America.

[5]  W. Leitz,et al.  Assessment and comparison of chest radiography techniques in the United States and Sweden. , 1990, The British journal of radiology.

[6]  G D Gillan,et al.  Development of a radiographic chest phantom with disease simulation. , 1979, Investigative radiology.

[7]  K. Rossmann,et al.  The central problem in the study of radiographic image quality. , 1970, Radiology.

[8]  T. R. Fewell,et al.  Beam quality independent attenuation phantom for estimating patient exposure from x-ray automatic exposure controlled chest examinations. , 1984, Medical physics.

[9]  C. Metz.  ROC Methodology in Radiologic Imaging , 1986, Investigative radiology.

[10]  G. Bengtsson,et al.  Patient exposures and radiation risks in Swedish diagnostic radiology. , 1978, Acta radiologica: oncology, radiation, physics, biology.

[11]  E O Terho,et al.  An evaluation of different imaging chains in clinical chest radiography. , 1984, The British journal of radiology.

[12]  S Kheddache,et al.  Digital chest radiography with a large image intensifier. An ROC study with an anthropomorphic phantom. , 1989, European journal of radiology.

[13]  E GrayetalJoel.  Quality Control in Diagnostic Imaging , 1983 .