Department of Oral Diagnosis - Dental Radiology, Piracicaba Dental School, State University of Campinas, São Paulo, Brazil.
Dentomaxillofac Radiol. 2019 Sep;48(6):20180369. doi: 10.1259/dmfr.20180369. Epub 2019 May 8.
To evaluate the quality of images obtained with the addition of a lead foil to intraoral digital receptors.
Radiographic images of 34 single-rooted human teeth - 19 with vertical root fracture (VRF) and 15 of the control group - were obtained with and without the addition of a lead foil, using the VistaScan, Express, Digora Optime and Digora Toto systems. Images were evaluated by five observers regarding the diagnosis of VRF, using a 5-point scale. In a second moment, an observer preference analysis related to the presence of the lead foil was performed. Images of an acrylic phantom were also obtained with and without the addition of a lead foil, and the quantities of uniformity, grey value and standard deviation of grey values were obtained.
There were no significant differences in the VRF diagnostic values, considering the presence of the lead foil. Regarding the image quality preference, the observers preferred images acquired with the lead foil for all systems tested, but with greater values for Digora Optime (61.33%) and Express (61.33%). The presence of the lead foil did influence the image uniformity in all systems tested ( < 0.05). Moreover, the lead foil increased the mean of grey values for Digora Optime and Express images ( < 0.05), however it did not influence the SD in any of the digital systems ( > 0.05).
The addition of a lead foil to intraoral digital receptors produces a positive effect in the image quality objectively detected by means of uniformity and subjective visual preference.
评估在口内数字接收器中添加铅箔对图像质量的影响。
使用 VistaScan、Express、Digora Optime 和 Digora Toto 系统，对 34 颗单根人牙（19 颗有垂直根折，15 颗为对照组）的放射影像进行拍摄，分别在添加和不添加铅箔的情况下进行。由 5 名观察者使用 5 分制评估这些影像，以诊断垂直根折。在第二阶段，对是否存在铅箔与观察者偏好进行了相关分析。同样，对一个丙烯酸体模的影像也进行了添加和不添加铅箔的拍摄，获得了均匀性、灰度值和灰度值标准差的数量。
在考虑存在铅箔的情况下，垂直根折的诊断值没有显著差异。关于图像质量偏好，所有测试系统的观察者都更喜欢添加铅箔的影像，但 Digora Optime（61.33%）和 Express（61.33%）的偏好值更高。在所有测试系统中，铅箔的存在都会影响图像的均匀性（ < 0.05）。此外，铅箔增加了 Digora Optime 和 Express 影像的灰度值均值（ < 0.05），但在任何数字系统中都不会影响 SD 值（ > 0.05）。
在口内数字接收器中添加铅箔会对均匀性和主观视觉偏好等客观检测的图像质量产生积极影响。
