Akesson L, Håkansson J, Rohlin M, Zöger B
Department of Oral Radiology, Lund University, Malmö, Sweden.
Swed Dent J. 1993;17(1-2):9-21.
The diagnostic image quality of panoramic radiographs originating from different clinics was examined. Two samples of 98 and 100 radiographs, respectively, were from a department of oral radiology. The radiographs of one of these samples were checked using immediate subjective analysis of the image quality before inclusion in the study whereas the radiographs of the other sample were randomly selected. A third sample consisted of radiographs from 20 randomly selected dental clinics. The subjective overall image quality of the whole panoramic radiograph was classified as adequate, marginal or inadequate. The three observers also assessed the reason for inferior image quality. The overall image quality of the radiographs was better for the checked sample from the department of oral radiology compared to the sample form the 20 dental clinics. The main reason for unacceptable image quality of the radiographs was too low density and/or contrast irrespective of sample. Other faults were incorrect positioning of the patient but in the sample from the 20 clinics improper film handling was also frequent. We conclude that image quality in panoramic radiography can be improved. Improvement of the image quality is a prerequisite if panoramic radiography in the future is to replace the full-mouth examination.
对来自不同诊所的全景X光片的诊断图像质量进行了检查。分别从口腔放射科获取了两个样本，各有98张和100张X光片。其中一个样本的X光片在纳入研究前通过对图像质量进行即时主观分析进行了检查，而另一个样本的X光片是随机选取的。第三个样本由来自20家随机选取的牙科诊所的X光片组成。整个全景X光片的主观整体图像质量被分类为足够、边缘或不足。三位观察者还评估了图像质量较差的原因。与来自20家牙科诊所的样本相比，口腔放射科经检查的样本的X光片整体图像质量更好。无论样本如何，X光片图像质量不可接受的主要原因是密度和/或对比度太低。其他问题是患者体位不正确，但在来自20家诊所的样本中，胶片处理不当也很常见。我们得出结论，全景X光摄影的图像质量可以得到改善。如果未来全景X光摄影要取代全口检查，图像质量的改善是一个先决条件。
