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At least 145 records · Page 8Linked to original sources
PubMed2005

The effects of BID length and shape on the surface area and volume of tissue exposed during dental radiography.

Using projection geometry, algebraic formulas, and different beam indicating devices (BIDs), the surface area and volume of tissue exposed for a hypothetical patient was determined. Combinations of 4 BID lengths and shapes were used: 4-inch (10.2 cm.) pointed plastic, 8-inch (20.3 cm.) round plastic, 14-inch (35.6 cm.) round aluminum, and 14-inch (35.6 cm.) rectangular aluminum. As each subject BID was progressively lengthened and collimated, the area and volume of tissue exposed was reduced. The calculated area and volume of exposed tissue for the 14-inch rectangular aluminum open-ended lead-lined BID was 16.6 cm.2 and 327.7 cm.3, respectively. This represented 9% of the area and 8% of the volume of tissue exposed using the 4-inch round pointed plastic BID or a 91% (area) and 92% (volume) reduction in patient exposure.

Filtration↗
PubMed1991

Post-mortem dental radiography: a useful innovation.

Post-mortem Intra-oral radiographs can reveal the entire status of the crowns of teeth when visual access is limited or impossible and afford a reliable means of achieving identification by a comparison with antemortem clinical records. Difficulties are often encountered in placing and retaining intra-oral films in the mouths of deceased persons whose mandibular musculature has been fixed in rigor mortis or by the effects of incineration. These difficulties may be minimised by the use of balloon catheters which can be inflated within the oral cavity and serve to support the film in place during radiographic exposure.

Cadaver↗
PubMedDate not supplied

[Possible usage of parallax phenomenon in dental radiography].

The authors describe a method of X-ray recording which uses the phenomenon of parallax in determination of exact localisation and inter-relationship of some elements within the upper and lower jaws. By describing the method in detail, the authors also point out its advantages in everyday estimation of the position of impacted teeth and their relationship to the surrounding anatomical points.

Humans↗
PubMed1989

[Significance of radiation exposure in dental radiography].

Radiation exposure must be evaluated in relation to quality improvement. Film contrast can be improved by limiting the exposed area to the film format; a beneficial side effect is the decrease in scatter radiation. Since a monthly evaluation of the x-ray equipment is now mandatory, the incidences of excessive skin exposure can be evaluated and eliminated. The newly developed technology of electronic radiologic diagnosis without film on a monitor promises a further reduction of radiation dose in the future.

Background Radiation↗