Pogrel M A, Kopf J, Dodson T B, Hattner R, Kaban L B
Department of Oral and Maxillofacial Surgery, University of California, San Francisco, USA.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1995 Aug;80(2):226-31. doi: 10.1016/s1079-2104(05)80206-9.
A prospective study was designed to compare two methods of quantifying technetium-99m methylene diphosphonate uptake in the mandibular condyle. The standard technique expresses condylar activity as a ratio of condylar uptake to a reference (often the fourth lumbar vertebra) with planar scans (lateral images of the mandible). The experimental technique quantifies condylar activity as a ratio of condyle to clivus uptake with single-photon emission computed tomography (SPECT). The results of this study indicated that the uptake ratio of condyle/clivus by SPECT scintigram was positively correlated (p = 0.039) with the planar scan technique. The SPECT technique, similar to an axial computed tomography scan, was easier to perform with better reproducibility than the standard planar technique. In addition, activity in the clivus showed less variation than activity in the fourth lumbar vertebrae. With the development of normal uptake standards in the clivus, the SPECT technique may replace the planar image technique in nongrowing patients.
一项前瞻性研究旨在比较两种量化下颌髁突中锝-99m亚甲基二膦酸盐摄取的方法。标准技术通过平面扫描（下颌骨侧位图像）将髁突活性表示为髁突摄取与参考值（通常是第四腰椎）的比值。实验技术通过单光子发射计算机断层扫描（SPECT）将髁突活性量化为髁突与斜坡摄取的比值。该研究结果表明，SPECT闪烁图的髁突/斜坡摄取率与平面扫描技术呈正相关（p = 0.039）。SPECT技术类似于轴向计算机断层扫描，比标准平面技术更易于操作且重现性更好。此外，斜坡的活性变化小于第四腰椎的活性变化。随着斜坡正常摄取标准的建立，SPECT技术可能会在非生长型患者中取代平面图像技术。
