Department of Dentomaxillofacial Radiology, Ankara Yildirim Beyazit University Faculty of Dentistry, Ankara, Turkey.
Department of Dentomaxillofacial Radiology, Istanbul Bahcesehir University Faculty of Dentistry, Istanbul, Turkey.
Oral Radiol. 2021 Apr;37(2):276-281. doi: 10.1007/s11282-020-00446-x. Epub 2020 May 20.
Cone-beam computed tomography (CBCT), despite its advantages, has some drawbacks, such as artifacts and movement of the patient during scanning may lead to motion artifacts (MAs). This retrospective study aimed to evaluate the MAs in three different CBCT devices and to analyze their relationship with age, the gender of the patients, and scanning times.
This study included 360 CBCT images from three institutions scanned in standing, sitting and supine positions. MAs presence, age, gender, and scanning times were recorded. Of the patients, 129 were scanned in standing position, 131 in sitting position, and 100 in supine position.
MAs were found in 6.7% of patients in total; 8%, 7.6%, and 4% in standing, sitting, and supine positions, respectively. No statistically significant relationship was observed between MAs presence and patient position. The mean age of the patients with MAs was higher than patients without, in total and in standing positions. Scanning time showed no correlation with artifact presence.
Patient position is not related to MAs presence. The age of the patient is a factor in movement, and has a high impact in standing position. Although insignificant, MAs were less common in supine position than sitting and standing positions. Sitting and supine positioning might reduce motion artifacts in older patients.
锥形束 CT（CBCT）虽然具有优势，但也存在一些缺点，例如扫描过程中患者的运动可能会导致运动伪影（MA）。本回顾性研究旨在评估三种不同 CBCT 设备中的 MA，并分析其与年龄、患者性别和扫描次数的关系。
本研究纳入了来自三个机构的 360 个 CBCT 图像，这些图像分别在站立、坐立和仰卧位扫描。记录 MA 的存在、患者的年龄、性别和扫描次数。其中，129 例患者在站立位扫描，131 例患者在坐立位扫描，100 例患者在仰卧位扫描。
总共发现 6.7%的患者存在 MA；在站立、坐立和仰卧位中，分别有 8%、7.6%和 4%的患者存在 MA。MA 的存在与患者体位之间未观察到统计学上的显著关系。存在 MA 的患者的平均年龄高于无 MA 的患者，无论是总患者还是站立位患者。扫描时间与伪影的存在没有相关性。
患者体位与 MA 的存在无关。患者的年龄是运动的一个因素，且在站立位时影响较大。虽然不显著，但仰卧位时 MA 比坐立位和站立位时少见。对于老年患者，坐立位和仰卧位可能会减少运动伪影。
