| 潘晓龙,吴岩,韩丹,杨静,赵旭冉,陆琳,张正华,赵卫.基于体质量指数双能量冠状动脉CTA低剂量检查[J].中国医学影像技术,2015,31(5):774~778 |
| 基于体质量指数双能量冠状动脉CTA低剂量检查 |
| Based on body mass index to reduce radiation dose on dual-energy coronary computed tomography angiography |
| 投稿时间：2014-11-16 修订日期：2014-12-25 |
| DOI：10.13929/j.1003-3289.2015.05.035 |
| 中文关键词: 冠状血管造影术 体层摄影术,X线计算机 体质量指数 |
| 英文关键词:Coronary angiography Tomography, X-ray computed Body mass index |
| 基金项目:昆明医科大学硕士研究生创新型项目(2014N07)。 |
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| 中文摘要: |
| 目的 探讨基于体质量指数(BMI)低管电流自动原始数据域迭代重建(SAFIRE)技术双能量冠状动脉CTA低剂量检查的可行性。方法 将200例患者分为4组:A组(19 kg/m2≤BMI<24 kg/m2),A管电流为180 mAs,采用FBP重建;B组(BMI<19 kg/m2),A管电流60 mAs;C组(19 kg/m2≤BMI<24 kg/m2),A管电流90 mAs;D组(24 kg/m2≤BMI<30 kg/m2),A管电流120 mAs,B、C、D组采用SAFIRE-3级重建。比较4组平均CT值、图像噪声、SNR、CNR、图像质量主观评分及辐射剂量。结果 4组患者冠状动脉显示节段、图像质量主观评分、平均CT值、SD、SNR、CNR差异均无统计学意义(P均>0.05);有效剂量(ED)差异有统计学意义(P均<0.05),ED值B、C、D组分别较A组下降65.82%、55.64%、24.18%。结论 基于BMI低管电流扫描SAFIRE重建双能冠状动脉CTA检查,能够保证图像质量并大幅降低辐射剂量。 |
| 英文摘要: |
| Objective To explore the feasibility of low mAs dose and sinogram-affirmed iterative reconstruction (SAFIRE) technology dual energy coronary CTA in patients with different body mass index (BMI). Methods Totally 200 patients were divided to four groups: Group A (19 kg/m2≤BMI<24 kg/m2), A tube current of 180 mAs, and filtered back projection (FBP) reconstruction; group B (BMI<19 kg/m2), A tube current of 60 mAs; group C (19 kg/m2≤BMI<24 kg/m2), A tube current of 90 mAs; group D (24 kg/m2≤BMI<30 kg/m2), A tube current of 120 mAs. Group B, C, D adopted SAFIRE 3. The differences of mean CT values, image noise (SD), SNR, CNR, subjective scores and radiation dose among four groups were compared. Results Displaying segment of coronary, subjective scores, CT values, SD, SNR, CNR were no statistical difference among four groups (all P>0.05), but effective radiation dose (ED) were significant (P<0.05). ED in group B, C, D reduced by 65.82%, 55.64%, 24.18% compared with group A. Conclusion Coronary CTA with low tube current at different BMI by SAFIRE can significantly reduce the radiation dose without reducing image quality. |
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