Hoseini Zarch S H, Bagherpour A, Javadian Langaroodi A, Ahmadian Yazdi A, Safaei A
Assistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry and Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Iran J Radiol. 2011 Sep;8(2):97-102. Epub 2011 Sep 25.
BACKGROUND/OBJECTIVE: Panoramic radiography has a great place among imaging techniques because of its enormous advantages. One of the characteristics of an ideal imaging technique is to supply precise measurement. The purpose of the current study was to evaluate the accuracy of linear measurements of the jaws on panoramic radiographs.
In this study, the vertical distances between the metal markers were measured by panoramic radiography in seven sites of two skulls in various head positions. Then the radiographic measurements were compared with the actual values.
Eighty three percent of the measurements were underestimated, 8.5% were overestimated on panoramic radiography and 8.5% of the measurements had no difference with the real measurements. Overestimation was not greater than 1 mm. The difference between actual and radiographic measurements was less in the posterior areas and in the mandible . In all head positions, the greatest difference between actual and radiographic measurements occurred in the anterior area.
Based on the results of this study, linear measurements on panoramic radiography are more reliable in the posterior areas and may be used in early clinical measurements.
背景/目的：全景放射摄影因其巨大优势在成像技术中占据重要地位。理想成像技术的特点之一是提供精确测量。本研究的目的是评估全景X线片上颌骨线性测量的准确性。
在本研究中，通过全景放射摄影测量两个颅骨在不同头部位置的七个部位金属标记之间的垂直距离。然后将放射学测量值与实际值进行比较。
在全景放射摄影中，83%的测量值被低估，8.5%被高估，8.5%的测量值与实际测量值无差异。高估不超过1毫米。实际测量值与放射学测量值之间的差异在后牙区和下颌骨较小。在所有头部位置，实际测量值与放射学测量值之间的最大差异出现在前牙区。
基于本研究结果，全景放射摄影的线性测量在后牙区更可靠，可用于早期临床测量。
