Detectability of the Mediastinal Lines: Comparison of Conventional Film-Screen Radiography and DigitalRadiography.
10.3348/jkrs.1998.38.4.647
- Author:
Hye Young SHIN
1
;
Kyung Joo PARK
;
Doo Kyung KANG
;
Kang Lai LEE
;
Chang Jin HAN
;
Jung Ho SUH
Author Information
1. Department of Diagnostic Radiology, Ajou University College of Medicine, Korea.
- Publication Type:Original Article
- Keywords:
Radiography, digital;
Mediastinum, radiography
- MeSH:
Mediastinal Diseases;
Radiographic Image Enhancement;
Radiography*;
Radiography, Thoracic
- From:Journal of the Korean Radiological Society
1998;38(4):647-651
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: Using dynamic range compression (DRC) processing, this study compared the detectability ofmediastinal lines by conventional film screen rediography (FS) and by storage phosphor digital radiography(DR). MATERIALS AND METHODS: We selected 200 normal consecutive chest radiographs (100 FS, 100 DR) ; dynamic rangecompression was applied to DR processing and moving grids were used in both systems. Seven mediastinal lines (leftfaraspinal, right paraspinal, azygoesophageal, left para-aortic, posterior junctional, anterior junctional andright paratracheal) were scored from 0 point to 3 point(0:not visible, 1:suspiciously visible, 2:visible, but notclear, 3: clearly visible) according to visibility and sharpness, as agreed by a radiologist and a resident. Thedifferences between the two modalities were compared and analyzed by chi-square test. RESULTS: Among the 1400mediastinal lines analyzed, 419 lines by DR(59.9%) and 232 lines by FS(33.1%) were scored more than 2 points. Inall mediastinal lines except the left para-aortic, DR was more detectable and clearer than FS, with statisticalsignificance(P<.01). CONCLUSION: DR processed with DRC visualizes mediastinal lines more frequently and clearlythan conventional FS, and is therefore thought to be useful for the evaluation of mediastinal diseases.
