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Impact of Digital Panoramic Radiograph Magnification on Vertical Measurement Accuracy

机译:数字全景射线照相放大率对垂直测量精度的影响

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Objectives.The purpose of this panoramic radiography study was to assess the impact of image magnification on the accuracy of vertical measurements in the posterior mandible.Methods.Six dental implants, inserted in the posterior segments of a resin model, were used as reference objects. Two observers performed implant length measurements using a proprietary viewer with two preset image magnifications: the low (1.9 : 1) and the medium (3.4 : 1) image magnifications. They also measured the implant lengths in two Digital Imaging Communications in Medicine viewers set at low (1.9 : 1), medium (3.4 : 1), and high (10 : 1) image magnifications.Results.The error between the measured length and the real implant length was close to zero for all three viewers and image magnifications. The percentage of measurements equal to the real implant length was the highest (83.3%) for the high image magnification and below 30% for all viewers with the low image magnification.Conclusions.The high and medium image magnifications used in this study allowed accurate vertical measurements, with all three imaging programs, in the posterior segments of a mandibular model. This study suggests that a low image magnification should not be used for vertical measurements on digital panoramic radiographs when planning an implant in the posterior mandible.
机译:目的是该全景射线照相研究的目的是评估图像放大率对后颌骨后部的垂直测量精度的影响。用作参考物体的中颌骨后部的垂直测量的准确性。两个观察者使用具有两个预设图像放大倍数的专有观察者进行植入长度测量:低(1.9:1)和介质(3.4:1)图像放大倍数。它们还测量了在低(1.9:1),培养基(3.4:1),高(10:1)图像放大率的医学观察者中的两种数字成像通信中的植入长度。结果。测量的长度和误差之间的误差对于所有三个观众和图像放大倍数,真正的植入长度接近零。等于实际植入长度的测量百分比是高图像倍率的最高(83.3%),对于具有低图像倍率的所有观众的高图像倍率和低于30%。结论。本研究中使用的高和中型图像倍率允许精确垂直在下颌模型的后段中,使用三个成像程序进行测量。该研究表明,在林下植入物中,不应用于数字全景射线照相的低图像放大率。

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