Comparison of the Effective Radiation Dose in the Region of the Facial Skull Between Multidetector CT, Dental Conebeam CT and Intraoperative 3D C-Arms

IF 0.8 Q4 DENTISTRY, ORAL SURGERY & MEDICINE
Sebastian Pietzka, Anne Grieser, Karsten Winter, Alexander Schramm, Marc Metzger, Wiebke Semper-Hogg, Michael Grunert, Marcel Ebeling, Andreas Sakkas, Frank Wilde
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Abstract

Study Design Experimental single-centre study of X-ray absorption using a phantom skull. Objective This experimental study aimed to compare the radiation doses of different 3D imaging devices used in maxillofacial surgery, including one Multidetector CT (MDCT), two Conebeam CT (CBCT) and four intraoperative 3D C-arms. Methods Thermoluminescent dosimeters (TLD) were used to determine the absorbed radiation in an Alderson-Rando phantom skull. The phantom skull was positioned in the before mentioned seven devices and a defined 3D facial skull image was acquired. Subsequently, the TLD’S were read out and the effective doses (ED) and the organ doses (OD) were calculated and compared. Results OD varied significantly between tissues as well as between the 3D X-ray devices. The OD of the 3D C-arms were significantly lower than those of all other devices. The OD of the CT, especially in the standard setting, was the highest. Only by special adjustments of the scan protocol regarding CMF requirements for traumatology, the MDCT could achieve almost equivalent doses as the two tested CBCT-scanners. The calculated effective doses were also lowest for the 3D C-arm devices (11.2 to 129.9 μSv). The ED of the MDCT were significant higher (284.52–844.97 μSv) than in all other devices. The ED of the CBCTs (173.7–184.9) were lower than for MDCT but still higher than those of the 3D C-arms. Conclusions Intraoperative imaging using 3D C-arm devices is an effective method to verify reduction results in maxillofacial surgery intraoperatively with significantly lower ED than postoperatively CBCT and MDCT imaging.
多层螺旋CT、牙束CT及术中三维c型臂对面部颅骨区域有效辐射剂量的比较
研究设计利用假颅骨对x射线吸收进行实验性单中心研究。目的比较1台多层螺旋CT (Multidetector CT, MDCT)、2台锥形束CT (Conebeam CT, CBCT)和4台术中三维c臂的放射剂量。方法采用热释光剂量仪(TLD)测定Alderson-Rando模型颅骨的吸收辐射。幻影颅骨定位在上述七个装置中,并获得定义的3D面部颅骨图像。随后,读取TLD,计算有效剂量(ED)和器官剂量(OD)并进行比较。结果不同组织间及不同三维x线设备间OD差异显著。3D c型臂的外径明显低于其他所有装置。CT的外径,特别是在标准设置下,是最高的。只有根据创伤学的CMF要求对扫描方案进行特殊调整,MDCT才能达到与两种被测试的cbct扫描仪几乎相同的剂量。三维c臂装置的计算有效剂量也最低(11.2 ~ 129.9 μSv)。MDCT的ED (284.52 ~ 844.97 μSv)显著高于其他所有装置。cbct的ED(173.7-184.9)低于MDCT,但仍高于3D c臂。结论术中三维c臂成像是验证颌面部手术复位效果的有效方法,术中ED明显低于术后CBCT和MDCT成像。
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来源期刊
Craniomaxillofacial Trauma & Reconstruction
Craniomaxillofacial Trauma & Reconstruction DENTISTRY, ORAL SURGERY & MEDICINE-
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