Evaluation of rare-earth imaging systems in panoramic radiography

Journal Article · Mon Oct 01 04:00:00 EDT 1984 · Oral Surg., Oral Med., Oral Pathol.; (United States)

DOI:https://doi.org/10.1016/0030-4220(84)90346-3· OSTI ID:6005377

Gratt, B M; White, S C; Packard, F L; Petersson, A R

Panoramic radiographs were made of ninety-nine consenting adult patients who had image-analysis test devices placed within their oral cavities. Quantitative characteristics and perceived image quality of eight screen-film combinations were investigated. The quantitative characteristics of the images evaluated included contrast, resolution (in three regions), and bead detection (a measure of noise). Perceived image quality assessed similar characteristics. In addition, expert observers rated the resultant patient radiographs for both general and specific diagnostic tasks. Calcium tungstate screen-film systems were found to have the highest contrast but with resolution comparable to rare-earth screen-film systems under clinical test conditions. Calcium tungstate systems required up to twice the radiation exposure of the patient. It was found that some rare-earth screen-film combinations may produce clinically acceptable panoramic radiographs while reducing the patient's radiation exposure.

• OSTI ID: 6005377
• Journal Information: Oral Surg., Oral Med., Oral Pathol.; (United States), Journal Name: Oral Surg., Oral Med., Oral Pathol.; (United States) Vol. 58:4; ISSN OSOMA
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ALKALINE EARTH METAL COMPOUNDS
BIOMEDICAL RADIOGRAPHY
CALCIUM COMPOUNDS
CALCIUM TUNGSTATES
COMPARATIVE EVALUATIONS
DENTISTRY
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
DOSES
EVALUATION
IMAGE PROCESSING
IMAGES
INORGANIC PHOSPHORS
MEDICINE
NUCLEAR MEDICINE
ORAL CAVITY
PATIENTS
PHOSPHORS
PROCESSING
RADIATION DOSES
RADIOLOGY
RARE EARTH COMPOUNDS
TUNGSTATES