低管电压（100 kV）联合自适应统计迭代重建技术（ASIR-V）对Adamkiewicz动脉可视化及图像质量的影响：与120 kV扫描方案的比较

Effect of Low Tube Voltage (100 kV) Combined with ASIR-V on the Visualization and Image Quality of the Adamkiewicz Artery: A Comparison with 120 kV Protocol.

作者信息

Deng Jiantao, Ma Ting, Yan Jing, Wu Siyi, Yan Gaowu, Li Hongwei, Li Yong, Zhao Linwei, Fan Xiaoping, McClure Morgan A, Bhetuwal Anup

机构信息

Department of Radiology, Suining Central Hospital, Suining 629000, China.

Department of Radiology, The Third Hospital of Mianyang and Sichuan Mental Health Center, Mianyang 621000, China.

出版信息

Diagnostics (Basel). 2023 Jul 27;13(15):2495. doi: 10.3390/diagnostics13152495.

OBJECTIVE

To evaluate the effect of low tube voltage (100 kV) combined with adaptive statistical iterative reconstruction-V (ASIR-V) on the visualization and image quality of the Adamkiewicz artery (AKA).

METHODS

One hundred patients were prospectively enrolled and randomly assigned into two groups (both = 50). Group A (100 kV) was reconstructed with filtered back projection (FBP) and ASIR-V from 10% to 100% with 10% intervals. Group B (120 kV) was only reconstructed with FBP. The objective image quality was evaluated by using CT values of the aorta (CT), background noise, signal-to-noise ratio of the descending aorta (SNR), and contrast-to-noise ratio of the spinal cord (CNR). The subjective image quality and visualization scores of the AKA were assessed on a 5-point scale.

RESULTS

CT was significantly higher in Group A than in Group B ( < 0.001). When ASIR-V weights were ≥60%, significant differences were found in the background noise, SNR, and CNR between the two groups (all < 0.05). In Group A, compared with FBP, the subjective score gradually increased as ASIR-V increased to 80%, which decreased when ASIR-V exceeded 80%. The visualization scores of the AKA (≥60%) and the ability to detect vessel continuity (≥80%) gradually increased as the ASIR-V weights increased ( < 0.05). The effective radiation dose was reduced by about 40.36% in Group A compared to Group B.

CONCLUSIONS

compared with conventional scanning protocol, using a combination of low tube voltage (100 kV) and 80% ASIR-V protocol could not only increase the visualization of the AKA, but also improve image quality and reduce the radiation doses.

目的

评估低管电压（100 kV）联合自适应统计迭代重建-V（ASIR-V）对Adamkiewicz动脉（AKA）可视化及图像质量的影响。

方法

前瞻性纳入100例患者并随机分为两组（每组n = 50）。A组（100 kV）采用滤波反投影（FBP）及权重从10%至100%、间隔为10%的ASIR-V进行重建。B组（120 kV）仅采用FBP进行重建。通过主动脉CT值（CT）、背景噪声、降主动脉信噪比（SNR）及脊髓对比噪声比（CNR）评估客观图像质量。采用5分制对AKA的主观图像质量及可视化评分进行评估。

结果

A组的CT值显著高于B组（P < 0.001）。当ASIR-V权重≥60%时，两组间背景噪声、SNR及CNR存在显著差异（均P < 0.05）。在A组中，与FBP相比，随着ASIR-V增加至80%，主观评分逐渐升高，当ASIR-V超过80%时主观评分降低。随着ASIR-V权重增加，AKA的可视化评分（≥60%）及检测血管连续性的能力（≥80%）逐渐升高（P < 0.05）。与B组相比，A组的有效辐射剂量降低了约40.36%。