Abdi Ahmed Jibril, Mussmann Bo, Mackenzie Alistair, Klaerke Benedikte, Andersen Poul Erik
Region of Southern Denmark, Clinical Engineering Department, Area of Diagnostic Radiology, B. Winsløws Vej 4, Indgang 34, Odense C, Denmark.
Department of Radiology, Odense University Hospital, Odense C, Denmark.
Radiat Prot Dosimetry. 2019 Dec 23;185(2):252-265. doi: 10.1093/rpd/ncz006.
To assess and compare the radiation dose and image quality of the low dose 2D/3D EOS slot scanner (LDSS) to conventional digital radiography (DR) X-ray imaging systems for chest and knee examination protocols.
The effective doses (ED) to the patient in the chest and knee clinical examination protocols for LDSS and DR X-ray imaging systems were determined using the dose area product and PCXMC Monte Carlo simulation software. The CDRAD phantom was imaged with 19 cm, and 13 cm thick Polymethyl Methacrylate (PMMA) blocks to simulate the chest and knees respectively of a patient of average adult size. The contrast detail resolution was calculated using image analysis software.
The EDs for the LDSS default setting were up to 69% and 51% lower than for the DR systems for the chest (speed 4) and knee (speed 6) protocols, respectively, while for the increased dose level setting then the EDs were up to 42% and 35% lower than for the DR systems for the chest (speed 6) and knee (speed 8) protocols respectively. At the default setting, the contrast detail was lowest for the default setting of the 2D/3D low dose slot scanner (LDSS) for both chest and knee examinations, but at the highest dose levels then the threshold were equal or higher than the contrast resolution of DR imaging systems.
The LDSS has the potential to be used for clinical diagnosis of chest and knee examinations using the higher dose level. For speed 6 in chest protocol and speed 8 in knee protocol, the measured contrast detail resolution was comparable with the DR systems but at a lower effective dose.
评估并比较低剂量二维/三维 EOS 狭缝扫描仪（LDSS）与传统数字放射摄影（DR）X 射线成像系统在胸部和膝关节检查方案中的辐射剂量和图像质量。
使用剂量面积乘积和 PCXMC 蒙特卡罗模拟软件，确定 LDSS 和 DR X 射线成像系统在胸部和膝关节临床检查方案中对患者的有效剂量（ED）。使用 19 cm 和 13 cm 厚的聚甲基丙烯酸甲酯（PMMA）块对 CDRAD 体模进行成像，分别模拟平均成年体型患者的胸部和膝关节。使用图像分析软件计算对比度细节分辨率。
对于胸部（速度 4）和膝关节（速度 6）检查方案，LDSS 默认设置下的有效剂量分别比 DR 系统低 69%和 51%，而在增加剂量水平设置时，胸部（速度 6）和膝关节（速度 8）检查方案的有效剂量分别比 DR 系统低 42%和 35%。在默认设置下，二维/三维低剂量狭缝扫描仪（LDSS）在胸部和膝关节检查的默认设置下对比度细节最低，但在最高剂量水平时，阈值等于或高于 DR 成像系统的对比度分辨率。
LDSS 有潜力用于胸部和膝关节检查的临床诊断，使用较高剂量水平。对于胸部检查方案中的速度 6 和膝关节检查方案中的速度 8，测量的对比度细节分辨率与 DR 系统相当，但有效剂量较低。
