双源CT非线性融合技术对超重或肥胖患者心脏成像质量优化初步研究

发布时间：2018-06-25 06:08

  本文选题：肥胖 + 线性融合　； 参考：《医学影像学杂志》2016年06期

【摘要】：目的探讨炫速双源CT非线性融合技术对超重或肥胖患者心脏CT成像质量的优化价值。方法 36位体质指数处于超重或肥胖的患者行双能量心脏增强扫描,每一位患者重建4组图像,A组:NLB1(λ=150HU,ω=200HU),B组:NLB2(λ=70HU,ω=200HU),C组:NLB3(λ=260HU,ω=200HU),D组:NLB4(λ=260HU,ω=400HU),测量并计算上述图像主动脉根部、右冠状动脉中段、左冠状动脉主干和左心室前壁的CT值、图像噪声、SNR、CNR。采用TWO-WAY ANOVA及TUKEY检验客观评价各组图像质量。结果 4组图像间除心肌CT值无统计学差异外(F=2.492,P=0.064),余各部位CT值、噪声、SNR、CNR均具有统计学差异(P0.05)。各血管CT值B组最高,与A组均无统计学差异。各血管噪声B组最小,与A组无统计学差异。心肌噪声C组最小,与A组无统计学差异。各血管SNR A、B组较高,两组无统计学差异。心肌SNR以A、C、D组较大,与B组有统计学差异。各血管均以D组SNR最小。心肌SNR B组最小。所有CNR均以A组最高,与B组无统计学差异,D组最小。结论非线性融合技术选择合适的融合参数(λ=150HU,ω=200HU)既可以提升超重或肥胖患者冠状动脉的强化效果又可以抑制冠状动脉及心肌噪声,进一步提高心脏CT成像的CNR。
[Abstract]:Objective to evaluate the value of hygroscopic dual source CT nonlinear fusion technique in cardiac CT imaging quality optimization in overweight or obese patients. Methods Thirty-six patients with body mass index (BMI) who were overweight or obese underwent dual-energy cardioenhancement scans. Each patient reconstructed 4 images of group A: NLB1 (位 ~ (150) HU, 蠅 ~ (200) Hu) and group B: NLB2 (位 ~ (70) HU, 蠅 ~ (200) Hu), group C: NLB3 (位 260 HUU, 蠅 ~ (200 Hu), group D: NLB _ 4 (位 ~ (26) HUU, 蠅 ~ (400) Hu), the root of aorta and the middle segment of right coronary artery were measured and calculated. The CT value of left coronary artery and left ventricular anterior wall, the image noise of SNR and CNR. TWO-WAY ANOVA and TUKEY were used to evaluate the image quality of each group. Results there was no significant difference in CT value between the four groups except myocardial CT value (FFV 2.492P ~ (0.064). There were significant differences in CT value and SNRN CNR between the rest of the four groups (P0.05). The CT value of each blood vessel in group B was the highest, and there was no statistical difference between group A and group A. The vascular noise in group B was the least, and there was no statistical difference between group A and group A. Myocardial noise in group C was the least, and there was no statistical difference between group A and group A. The SNR Agna B group was higher than that of the control group, and there was no statistical difference between the two groups. The myocardial SNR was higher in group A Con D than that in group B. The SNR of group D was the smallest. Myocardial SNR B group was the smallest. All CNR was the highest in group A and the smallest in group D. Conclusion selecting suitable fusion parameters (位 ~ (150) HU, 蠅 ~ (200) Hu) can not only enhance the enhancement effect of coronary artery in overweight or obese patients, but also inhibit coronary artery and myocardial noise, and further improve the CNRs of cardiac CT imaging.
【作者单位】： 苏州大学附属第一医院放射科;
【分类号】：R589.2;R816.2
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本文编号：2064923