Parks E T
Department of Allied Health, Western Kentucky University, Bowling Green.
Oral Surg Oral Med Oral Pathol. 1991 Apr;71(4):509-13. doi: 10.1016/0030-4220(91)90442-f.
This study was designed to determine whether various techniques for achieving rectangular collimation generate different numbers and types of errors and remakes and to determine whether operator skill level influences errors and remakes. Eighteen students exposed full-mouth series of radiographs on manikins with the use of six techniques. The students were grouped according to skill level. The radiographs were evaluated for errors and remakes resulting from errors in the following categories: cone cutting, vertical angulation, and film placement. Significant differences were found among the techniques in cone cutting errors and remakes, vertical angulation errors and remakes, and total errors and remakes. Operator skill did not appear to influence the number or types of errors or remakes generated. Rectangular collimation techniques produced more errors than did the round collimation techniques. However, only one rectangular collimation technique generated significantly more remakes than the other techniques.
本研究旨在确定实现矩形准直的各种技术是否会产生不同数量和类型的误差及重拍情况，并确定操作人员的技术水平是否会影响误差和重拍情况。18名学生使用六种技术在人体模型上拍摄了全口系列X光片。学生们根据技术水平进行分组。对X光片进行评估，以确定以下类别中的误差及因误差导致的重拍情况：锥形切割、垂直角度和胶片放置。在锥形切割误差及重拍、垂直角度误差及重拍以及总误差及重拍方面，各技术之间存在显著差异。操作人员的技术水平似乎并未影响所产生的误差数量或类型以及重拍情况。矩形准直技术产生的误差比圆形准直技术更多。然而，只有一种矩形准直技术产生的重拍明显多于其他技术。
