CAJ | 학술논문

目的：探讨能谱 CT 单能图像对提高布加综合征患者成像质量的价值。方法40例布加综合征患者行能谱成像(GSI),通过 GSI 软件最佳对比噪声比(CNR)曲线分别选取下腔静脉及肝静脉最佳 CNR 单能量图像,分别测量下腔静脉肝内段、肝静脉以及同层面肝脏组织 CT 值和噪声,同时测量140 kVp 混合能量及70 keV 图像相同区域的 CT 值和噪声,计算最佳 CNR 单能图像、140 kVp 混合能量图像以及70 keV 图像的 CNR,并对最佳 CNR 单能图像及140 kVp 混合能量图像和70 keV 图像进行主观评分,采用单因素方差分析进行比较。结果下腔静脉最佳 CNR 的单能水平分布于40 keV(50%)和(51±1)keV(50%),肝静脉最佳CNR 单能水平分布于40 keV(25%)和(53±3)keV(75%),下腔静脉/肝静脉最佳 CNR 单能图像中的 CNR、下腔静脉/肝静脉 CT值和图像质量评分均显著高于140 kVp 混合能量及70 keV 图像,差异均有统计学意义(P <0.01)。结论最佳 CNR 单能图像能够提高布加综合征患者下腔静脉及肝静脉的成像质量。
목적：탐토능보 CT 단능도상대제고포가종합정환자성상질량적개치。방법40례포가종합정환자행능보성상(GSI),통과 GSI 연건최가대비조성비(CNR)곡선분별선취하강정맥급간정맥최가 CNR 단능량도상,분별측량하강정맥간내단、간정맥이급동층면간장조직 CT 치화조성,동시측량140 kVp 혼합능량급70 keV 도상상동구역적 CT 치화조성,계산최가 CNR 단능도상、140 kVp 혼합능량도상이급70 keV 도상적 CNR,병대최가 CNR 단능도상급140 kVp 혼합능량도상화70 keV 도상진행주관평분,채용단인소방차분석진행비교。결과하강정맥최가 CNR 적단능수평분포우40 keV(50%)화(51±1)keV(50%),간정맥최가CNR 단능수평분포우40 keV(25%)화(53±3)keV(75%),하강정맥/간정맥최가 CNR 단능도상중적 CNR、하강정맥/간정맥 CT치화도상질량평분균현저고우140 kVp 혼합능량급70 keV 도상,차이균유통계학의의(P <0.01)。결론최가 CNR 단능도상능구제고포가종합정환자하강정맥급간정맥적성상질량。
Objective To investigate the effect of special CT monochromatic images on improving imaging quality in Budd-Chiari Syndrome.Methods 40 patients with Budd-Chiari Syndrome underwent CT venography (CTV)with gemstone spectral imaging (GSI).Using the optimal contrast to noise ratio (CNR)curve of GSI software,the optimal CNR monochromatic images of the infe-rior vena cava and hepatic vein were chosen.The CT value of the intrahepatic segment of inferior vena cava,hepatic vein and the same level liver tissue were measured,and the CT value of the same region were measured on 140 kVp mixed energy images and 70 keV images.CNR on the optimal monochromatic images,the 140 kVp mixed energy images and 70 keV images were calculated respectively,and the image quality of the optimal monochromatic image,the 140 kVp mixed energy images and 70 keV images were subjective scoring.One-way ANOVA was used for statistical analysis using SPSS1 7.0 software.Results The optimal keVs from monochromatic images were distributed at 40 keV (50%)and (5 1 ± 1 )keV (50%)for IVC and 40keV (25%)and (53 ± 3)keV (75%)for HV.The CNR and CT value and subjective score of IVC/HV got from the optimal monochromatic images were signifi-cantly higher than those from 140 kVp mixed energy images and 70 keV images respectively(P <0.01 ).Conclusion The optimal monochromatic images provide higher image quality of IVC and HV in patientswithBudd-Chiari syndrome.