Zhang Wenjian, Huynh Carolyn P, Abramovitch Kenneth, Leon Inga-Lill K, Arvizu Liliana
Department of Diagnostic and Biomedical Sciences, University of Texas School of Dentistry at Houston (UTSD), Houston, Texas 77030, USA.
Tex Dent J. 2012 Jun;129(6):589-96.
The objective of this study was to compare the technical errors of intraoral radiographs exposed on film v photostimulable phosphor (PSP) plates.
The intraoral radiographic images exposed on phantoms from preclinical practical exams of dental and dental hygiene students were used. Each exam consisted of 10 designated periapical and bitewing views. A total of 107 film sets and 122 PSP sets were evaluated for technique errors, including placement, elongation, foreshortening, overlapping, cone cut, receptor bending, density, mounting, dot in apical area, and others. Some errors were further subcategorized as minor, major, or remake depending on the severity. The percentages of radiographs with various errors were compared between film and PSP by the Fisher's Exact Test.
Compared with film, there was significantly less PSP foreshortening, elongation, and bending errors, but significantly more placement and overlapping errors. Using a wrong sized receptor due to the similarity of the color of the package sleeves is a unique PSP error.
Optimum image quality is attainable with PSP plates as well as film. When switching from film to a PSP digital environment, more emphasis is necessary for placing the PSP plates, especially those with excessive packet edge, and then correcting the corresponding angulation for the beam alignment. Better design for improving intraoral visibility and easy identification of different sized PSP will improve the clinician's technical performance with this receptor.
本研究的目的是比较使用胶片和光激励荧光板（PSP）拍摄的口腔内X光片的技术误差。
使用牙科和口腔卫生专业学生临床前实践考试中在模型上拍摄的口腔X光片图像。每次考试包括10张指定的根尖片和咬合翼片。共评估了107套胶片和122套PSP，评估技术误差包括放置、拉长、缩短、重叠、遮线筒切割、感受器弯曲、密度、装片、根尖区域的小点等。根据严重程度，一些误差进一步细分为轻微、严重或需重新拍摄。通过Fisher精确检验比较胶片和PSP上有各种误差的X光片的百分比。
与胶片相比，PSP的缩短、拉长和弯曲误差明显更少，但放置和重叠误差明显更多。由于包装套筒颜色相似而使用尺寸错误的感受器是PSP特有的误差。
使用PSP板和胶片都能获得最佳图像质量。从胶片转换到PSP数字环境时，放置PSP板，尤其是那些边缘过大的PSP板，并随后校正光束对准的相应角度需要更多关注。改进口腔内可见性和便于识别不同尺寸PSP的更好设计将提高临床医生使用这种感受器的技术表现。
