In vitro comparison between the image obtained using PSP plates and Kodak E-speed films

Area of Science:

• Dental Radiology
• Digital Imaging Technology

Background:

• Traditional film-based radiography has been the standard for intra-oral imaging.
• Advancements in digital radiography systems, such as phosphor plate (PSP) technology, offer potential benefits in image quality, radiation dose, and diagnostic efficiency.

Purpose of the Study:

• To compare the Orex PSP digital radiography system with Kodak Ultra speed films.
• Evaluation focused on image quality, radiation dosage, and diagnostic value for intra-oral radiography.

Main Methods:

• Physical image quality was assessed using an aluminum step-wedge and dosimeter for radiation measurement.
• Unexposed films and PSP plates were analyzed for fog and base levels.
• An in vitro model with artificial approximal lesions (0.25-1.00 mm depth) in premolars and molars was used for radiographic evaluation.
• Eight experienced clinicians subjectively evaluated radiographs for lesion detection and size.

Main Results:

• Both systems demonstrated similar relative contrast.
• The PSP system exhibited lower resolving power compared to E-speed film.
• Subjective evaluation showed no significant difference in lesion detection between the two methods, except for teeth without lesions where analog film was more accurate.

Conclusions:

• The Orex PSP system provides acceptable image quality and diagnostic information.
• This digital system allows for reduced radiation exposure compared to E-speed film.