Khurana Sonam, Parasher Pranav, Creanga Adriana G, Geha Hassem
Oral Pathology, Radiology, and Medicine, New York University College of Dentistry, New York City, USA.
Diagnostic Radiology, Rutgers School of Dental Medicine, Newark, USA.
Cureus. 2023 Mar 24;15(3):e36630. doi: 10.7759/cureus.36630. eCollection 2023 Mar.
Purpose To assess the effect of 30° phantom inclination on image quality in the presence of an implant using cone-beam computed tomography (CBCT). Materials and methods Three series of eight scans were taken and categorized by a range of 87-90 kVp and 7.1 mA, and 8 mA. For the first CBCT series, the phantom was placed on a flat plane. For the second series, the phantom was inclined at 30° in the axial plane. For the third series, inclined scans were re-oriented and included for statistics. In total, 24 scans were used for statistics. i.e., eight scans at three different planes (flat plane, inclined plane, and re-oriented inclined plane). All the images were analyzed for artifact and contrast-to-noise ratio (CNR) on ImageJ software. Results The inclination of the dry human mandible phantom by 30° reduces the artifact (p <0.05). However, the CNR was not affected by the phantom inclination. Conclusion The appropriate inclination of the head can significantly reduce the metal artifact in the presence of implants and thus improve the CBCT image quality for post-operative follow-up.
目的 使用锥形束计算机断层扫描（CBCT）评估在存在植入物的情况下30°体模倾斜对图像质量的影响。材料与方法 进行了三个系列，每个系列八次扫描，并按87 - 90 kVp和7.1 mA以及8 mA的范围进行分类。对于第一个CBCT系列，体模放置在平面上。对于第二个系列，体模在轴向平面上倾斜30°。对于第三个系列，对倾斜扫描进行重新定向并纳入统计。总共24次扫描用于统计，即三个不同平面（平面、倾斜平面和重新定向的倾斜平面）各八次扫描。所有图像均在ImageJ软件上分析伪影和对比噪声比（CNR）。结果 干燥人体下颌骨体模倾斜30°可减少伪影（p <0.05）。然而，CNR不受体模倾斜的影响。结论 在存在植入物的情况下，头部的适当倾斜可显著减少金属伪影，从而提高CBCT术后随访的图像质量。
