ARTIFACTS DUE TO STATIC ELECTRICITY IN A DENTAL SCHOOL

被引:0
|
作者
SEWERIN, IP
机构
[1] Department of Radiology, School of Dentistry, Faculty of Health Science
关键词
RADIOGRAPHY; DENTAL; PANORAMIC; X-RAY FILM;
D O I
10.1259/dmfr.24.2.9515385
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
The diagnostic usefulness of radiographs is diminished by errors of film handling, and retakes mean increased radiation doses. Avoiding artefacts due to static electricity is part of a quality assurance programme. The number of types of artefacts originating from static electricity in the Department of Radiology, School of Dentistry, Copenhagen, were recorded over a five-week period with low temperatures and low air humidity. During the period 3137 intra-oral and 638 extra-oral films were processed by seven assistants and a number of trainees. A total of 48 artefacts on 47 extra-oral films was observed. The artefacts were classified into four types. Only one case of classical 'lightning' was found, while nine were of a hitherto undescribed type ('animals' or 'cactus flowers'). The most common type appeared as dots arranged in straight lines; their origin was obscure, but it was suspected that they were caused by the processing machine. The one typical 'lightning' case occurred on a Status-X film, consistent with the theory that friction may be a causative factor. Although individual frequencies varied, all the radiography assistants and trainees were associated with the artefacts recorded.
引用
收藏
页码:132 / 134
页数:3
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