Department of Periodontology, Academic Centre for Dentistry, Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands.
Department of Oral Radiology, Academic Centre for Dentistry, Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Clin Oral Investig. 2023 Sep;27(9):5391-5402. doi: 10.1007/s00784-023-05158-0. Epub 2023 Aug 4.
Rectangular collimation is a popular method used in intraoral radiography to reduce patient exposure to ionizing radiation. One of the perceived drawbacks of rectangular collimation is the possibility of an increase in cone cut errors ultimately impacting the diagnostic value of the radiographs. Thus, the aim of this study was to explore the frequency of cone cut errors in radiographs taken using a rectangular collimator.
Radiographs taken using PSP plates at Academic Center for Dentistry Amsterdam in the Netherlands by staff and students from January to December 2015 were assessed for cone cut errors. The radiographs were grouped as bitewings, front teeth, inferior premolars and molars, and superior premolars and molars and categorized as no cone cut, cone cut but diagnostically usable, and cone cut but diagnostically not usable. The results were entered into Microsoft Excel and analyzed thereafter.
A total of 53,684 radiographs were assessed, 79% had no cone cut errors and consequently 21% had some degree of cone cut. However, the diagnostic value was unaffected in 18% of the radiographs with cone cut. Only 3% of the radiographs were deemed diagnostically unusable due to cone cut. The most common area of cone cut was in the premolar and molar areas while cone cut in the front teeth was least likely to be diagnostically unusable.
Cone cut from the use of a rectangular collimator does not seem to result in an increase of diagnostically unusable radiographs. Thus, rectangular collimation should be preferred as it decreases the amount of radiation exposure to the patient while producing diagnostically usable radiographs and thus allowing the dental professional to adhere to the ALADA principle and practice radiation stewardship.
Scientific rationale for the study: rectangular collimation is a method used to reduce patient exposure to ionizing radiation; however, this benefit is negligible if radiographs must be retaken due to cone cut errors that make the radiograph diagnostically unusable. Therefore, the aim of this study was to explore the frequency of cone cut in radiographs taken using a rectangular collimator.
cone cut was observed in 21% of the radiographs; however, only 3% of the radiographs were considered diagnostically unusable.
rectangular collimation does not result in a high number of diagnostically unusable radiographs and should be used to reduce patient exposure to ionizing radiation.
在口腔放射摄影中，矩形准直器是一种常用的方法，可减少患者接受电离辐射的剂量。使用矩形准直器的一个被认为的缺点是可能会增加锥形切割误差，最终影响射线照片的诊断价值。因此，本研究的目的是探讨使用矩形准直器拍摄的射线照片中锥形切割误差的频率。
对 2015 年 1 月至 12 月期间，荷兰阿姆斯特丹牙科学院的工作人员和学生使用 PSP 板拍摄的射线照片进行锥形切割误差评估。将射线照片分为咬合片、前牙、下前磨牙和磨牙以及上前磨牙和磨牙，并分为无锥形切割、锥形切割但可诊断使用和锥形切割但不可诊断使用。结果输入 Microsoft Excel 并进行分析。
共评估了 53684 张射线照片，79%无锥形切割误差，因此 21%存在一定程度的锥形切割。然而，18%的带有锥形切割的射线照片的诊断价值未受影响。只有 3%的射线照片因锥形切割而被认为不可诊断使用。最常见的锥形切割区域是在后磨牙区域，而前牙的锥形切割最不可能不可诊断使用。
使用矩形准直器产生的锥形切割似乎不会导致不可诊断使用的射线照片数量增加。因此，应首选矩形准直器，因为它可以减少患者的辐射暴露量，同时生成可诊断使用的射线照片，从而使牙科专业人员能够遵守 ALADA 原则并进行辐射管理。
研究的科学依据：矩形准直是一种用于减少患者接受电离辐射的方法；然而，如果由于锥形切割错误导致射线照片必须重拍，从而使射线照片不可诊断使用，那么这种益处就微不足道了。因此，本研究的目的是探讨使用矩形准直器拍摄的射线照片中锥形切割的频率。
在 21%的射线照片中观察到锥形切割；然而，只有 3%的射线照片被认为不可诊断使用。
矩形准直不会导致大量不可诊断使用的射线照片，应使用它来减少患者接受电离辐射的剂量。
