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[Digitization of conventional x-ray films]
W Wenz1, C Buitrago-Tellez, U Blum
1Abteilung Röntgendiagnostik, Universitäts-Klinik, Freiburg.
Der Radiologe
|September 1, 1992
Summary
Digitizing analogue X-ray films with a charge-coupled-device (CCD) scanner improved detecting bone defects and kidney stone fragmentation. This system enhances diagnostic value, particularly for contrast-dependent imaging.
Area of Science:
- Medical Imaging
- Radiology
- Digital Health
Background:
- Analogue X-ray films are standard in diagnostics.
- Digital systems offer potential improvements in image quality and data handling.
Purpose of the Study:
- To assess the diagnostic value of a charge-coupled-device (CCD) scanner for digitizing analogue X-ray films.
- To evaluate the system's effectiveness across various radiological examinations.
Main Methods:
- Digitized 110 skeletal radiographs, 50 contrast studies (25 Crohn's disease), and 70 abdominal plain films.
- Utilized a CCD scanner with adjustable resolution (2.5 or 5 lp/mm).
- Conducted Receiver Operating Characteristic (ROC) studies and applied edge enhancement algorithms.
Main Results:
- Contrast-optimized digitized films significantly improved detection of cortical and trabecular defects.
- Edge enhancement algorithms did not provide additional diagnostic information.
- Inflammatory lesions in Crohn's disease were equally detectable on conventional and digitized images.
- Digitized images showed a statistically significant improvement in recognizing stone disintegration post-lithotripsy.
Conclusions:
- The tested digitization system is valuable for diagnostic radiology, especially in contrast-heavy applications like stone fragmentation and identifying cortical defects.
- Digital film analysis offers enhanced diagnostic capabilities for specific radiological tasks.