IDose4迭代重建技术应用于低剂量CT肾动脉血管造影的临床分析

doi:10.7517/issn.1674-0475.190904

摘要/Abstract

摘要： 为探讨IDose⁴迭代重建技术在低剂量CT肾动脉血管造影中的应用价值，选取205例拟行肾动脉CT血管造影患者，随机将其分为4组，A组（51例）采用管电压100 kV、管电流100 mA，碘海醇370 mg I/mL及IDose⁴迭代重建技术，B组（51例）采用管电压100 kV、管电流150 mA，碘海醇270 mg I/mL及IDose⁴迭代重建技术，C组（51例）采用管电压80 kV、管电流180 mA，碘海醇270 mg I/mL及IDose⁴迭代重建技术，D组（52例）管电压120 kV、管电流120 mA，碘海醇370 mg I/mL及滤波反投影（FBP）重建技术。分析各组图像肾主动脉干CT值、噪声（SD）、信噪比（SNR）和噪声比（CNR），受检者接受CT有效剂量（ED）、容积CT剂量指数（CTDI_vol）、剂量长度乘积（DLP）、碘摄入量以及重建图像评分差异和诊断效能。结果显示，A、B、C组重建图像评分优于D组，肾动脉主干CT值、SD、SNR、CNR均高于D组，B、C组肾动脉主干CT值、SD略低于A组。A、B、C组CTDI_vol、DLP、ED均低于D组，B组CTDI_vol、DLP、ED高于A组。A、B、C、D组诊断肾主动脉狭窄准确率分别为92.68%、86.49%、84.62%、82.86%。证实IDose⁴迭代重建技术能降低受试者受辐射和造影剂剂量，提高成像质量，在低剂量CT肾动脉血管造影中具有较高可行性和实用性。

关键词: IDose⁴迭代重建, 低剂量, 低辐射, CT肾动脉血管造影

Abstract: To evaluate the application of IDose⁴ iterative reconstruction technique in renal artery angiography with low-dose CT,205 patients who were to undergo renal artery CT angiography were randomly divided into four groups. Group A (51 cases) received 100 kV tube voltage, 100 mA tube current, 370 mg I/mL iohexol and IDose⁴ iterative reconstruction techniques. Group B (51 cases) used 100 kV tube voltage, 150 mA tube current, 270 mg I/mL iohexol and IDose⁴ iterative reconstruction techniques. Group C (51 cases) used 80 kV tube voltage, 180 mA tube current, 270 mg I/mL iohexol and IDose⁴ iterative reconstruction techniques.In group D, 52 cases were reconstructed by 120 kV tube voltage, 120 MV tube current, 370 mg I/ml iopromide and filter back projection (FBP). To determine the CT value, noise (SD), signal-to-noise ratio (SNR) and noise ratio (CNR) of renal aorta trunk in each group of images, the subjects received effective CT dose (ED), volumetric CT dose index (CTDI_vol), dose length product (DLP), iodine intake, reconstruction image score difference and diagnostic efficacy. The results showed that the scores of reconstructed images in group A, B and C were better than those in group D, CT value of renal artery trunk, SD, SNR and CNR in group A, B and C were higher than those in group D, while CT value of renal artery trunk and SD in group B and C were slightly lower than those in group A. CTDI_vol, DLP and ED in group A, B and C were lower than those in group D, while CTDI_vol, DLP and ED in group B were higher than those in group A. The diagnostic accuracy of A, B, C and D for renal aortic stenosis was 92.68%, 86.49%, 84.62% and 82.86%, respectively. The results confirmed that iterative reconstruction of IDose⁴ can reduce the dose of radiation and contrast agent and improve the quality of imaging. It has high feasibility and practicability in low dose CT renal angiography.

Key words: IDose⁴ iterative reconstruction, low dose, low radiation, CT renal artery angiography

中图分类号:

周永霞, 周容. IDose⁴迭代重建技术应用于低剂量CT肾动脉血管造影的临床分析[J]. 影像科学与光化学, 2020, 38(2): 253-259.

ZHOU Yongxia, ZHOU Rong. Clinical Analysis of IDose⁴ Iterative Reconstruction in Low Dose CT Renal Artery Angiography[J]. Imaging Science and Photochemistry, 2020, 38(2): 253-259.

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IDose⁴迭代重建技术应用于低剂量CT肾动脉血管造影的临床分析

Clinical Analysis of IDose⁴ Iterative Reconstruction in Low Dose CT Renal Artery Angiography

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