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Published on: August 5, 2021
Intra-oral computed radiography--an in vitro evaluation
Journal of Dentistry
|September 1, 1996
Summary
Computed radiography (Digora) offers comparable contrast differentiation to conventional E-speed films, achieving diagnostic quality images with reduced radiation exposure. While resolution is slightly lower, digital radiography provides acceptable results across various exposure times.
Area of Science:
- Dental radiology
- Medical imaging technology
Background:
- Conventional E-speed periapical films are standard for intra-oral radiography.
- Computed radiography (CR) systems offer digital alternatives for dental imaging.
Purpose of the Study:
- To compare CR (Digora) with conventional E-speed films.
- Evaluate image quality, radiation dosage, and diagnostic value.
Main Methods:
- Physical measurements of image quality using a test grating.
- Radiation dosage assessment with an X-ray test device.
- Standardized radiographic imaging on a human skull, with exposure times from 0.02s to 2.32s.
- Blind evaluation of image quality by five dental surgeons.
Main Results:
- CR demonstrated comparable contrast differentiation to E-speed films.
- CR resolution (5 lines/mm) was slightly inferior to E-speed films (6 lines/mm).
- Digital images were consistently diagnostically acceptable across exposure times, unlike E-speed films (0.38s–1.8s).
Conclusions:
- CR (Digora) provides favorable contrast differentiation.
- Resolution power of CR is slightly lower than E-speed film.
- Diagnostic quality digital images achieved with up to 53% radiation reduction compared to E-speed films.
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