| 李爱静,宋爱芹,潘宇宁,郑建军.低kV结合迭代重建在下肢动脉CT血管造影中的应用[J].中华放射医学与防护杂志,2016,36(6):465-469 |
| 低kV结合迭代重建在下肢动脉CT血管造影中的应用 |
| Application of low-tube-voltage combined with adaptive iterative reconstruction in lower extremity computed tomography angiography |
| 投稿时间：2015-11-12 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.06.014 |
| 中文关键词: 下肢动脉 迭代重建 血管造影 辐射剂量 图像噪声 |
| 英文关键词:Lower extremity Iterative reconstruction Computed tomography angiography Radiation dose Image noise |
| 基金项目: |
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| 摘要点击次数: 2410 |
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| 中文摘要: |
| 目的 探讨低管电压联合自适应性迭代低剂量(AIDR-3D)技术在下肢动脉CT血管造影(CTA)应用的可行性。方法 60例疑诊下肢动脉闭塞的患者按随机数字表法分为对照组(120 kV)和试验组(100 kV)各30例,采用Toshiba Aquilion ONE完成CTA。对照组采用传统滤波反投射法(FBP)进行重建,试验组采用FBP和AIDR-3D两种重建。分别比较两组的主观图像质量及血管内密度(VD)、噪声、信噪比(SNR)、对比信噪比(CNR)和剂量长度乘积(DLP)。结果 试验组DLP较对照组明显减低[(503.5±104.7)vs. (1099.4±151.7) mGy·cm,t=15.7,P<0.05]。FBP重建的试验组图像的VD和噪声明显高于对照组(t=-3.13、-3.61,P<0.05)。AIDR-3D重建的图像噪声明显低于FBP重建图像(t=13.59,P<0.05)。与对照组相比, AIDR-3D重建的试验组图像噪声明显减低(t=2.14,P<0.05),而VD、SNR和CNR明显增高(t=-3.75、-4.19、-4.15,P<0.05)。结论 在320排CT下肢动脉CTA检查中,100 kV联合AIDR-3D重建可提高图像质量,并大幅减低辐射剂量。临床试验注册 中国临床试验注册中心,CHiCTR-DPD-16008054。 |
| 英文摘要: |
| Objective To investigate the feasibility of low-tube-voltage in combination with the three-dimensional adaptive iterative dose reduction (AIDR-3D) algorithm in performing lower extremity computed tomography angiography (CTA). Methods A total of 60 patients suspicious of lower extremity arterial occlusion were randomized into control group (120 kV,n=30) and experimental group (100 kV,n=30). The CTA was undertaken with a 320-row scanner (Toshiba Aquilion ONE), and the images was reconstructed with filtered back projection (FBP) algorithm in control group and FBP as well as the AIDR-3D algorithm in experimental group. The subjective image quality, vascular density (VD), noise, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and dose length product (DLP) were compared between two groups. Results The DLP was significantly lower in experimental group than that in control group[(503.5±104.7) vs. (1099.4±151.7) mGy·cm, t=15.7, P<0.05]. The images in experimental group with 100 kV and FBP protocol had significantly increased VD and noise (t=-3.13,-3.61, P<0.05) than that in the control. The images in experimental group with AIDR-3D had significantly lower noise and higher SNR and CNR than that with FBP (t=13.59, 2.14,P<0.05), also significantly lower noise and significantly higher VD, SNR, and CNR than that in the control (t=-3.75, -4.19, -4.15,P<0.05). Conclusions Low-tube-voltage (100 kV) combined with AIDR-3D reconstruction could significantly improve the image quality and reduce radiation dose in lower extremity CTA with a 320-row CT scanner. Trial registration Chinese clinical trial registry, ChiCTR-DPD-16008054. |
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