Gratt B M, Parks C R, Hall G L, Sickles E A
Oral Surg Oral Med Oral Pathol. 1979 Jun;47(6):568-71. doi: 10.1016/0030-4220(79)90284-6.
An inclined footrest was evaluated as a positioning aid for dental panoramic radiography. Experimental and control groups of students were examined by a conventional panoramic technique, with and without the addition of an inclined footrest. All radiographs obtained were evaluated for six parameters in a single-blind fashion by three dentists. Results indicated that the inclined footrest reduced spinal-shadow artifacts and improved over-all image quality.
一种倾斜式脚凳被评估为牙科全景X线摄影的定位辅助工具。学生实验组和对照组通过传统全景技术进行检查，分别使用和不使用倾斜式脚凳。由三位牙医以单盲方式对获得的所有X线片的六个参数进行评估。结果表明，倾斜式脚凳减少了脊柱阴影伪影并改善了整体图像质量。
