宽体探测器CT胰腺轴位灌注“一站式”成像的可行性

发布时间：2018-06-05 04:43

本文选题：体层摄影术 + X线计算机　；参考：《中国医学影像技术》2017年06期

【摘要】：目的探讨Revolution CT胰腺轴位灌注"一站式"成像的可行性。方法收集接受Revolution CT上腹部轴位CT灌注(CTP)扫描的患者13例(CTP组),测量胰腺的CTP参数,提取最佳时期CTA及3期增强图像,并记录整个灌注期的辐射剂量。收集同期行全腹3期增强及CTA扫描者18例(对照组),采用螺旋扫描模式。2组患者胰腺均无病变。评价2名观察者测得各CTP参数和对胰十二指肠上动脉(SPDA)图像主观评分的一致性。比较2组SPDA图像的主观评分和CTA图像SPDA以及3期增强图像胰腺的CT值、图像噪声、CNR和SNR。结果 2名观察者测得CTP参数一致性良好(ICC均0.75)。灌注期有效辐射剂量为(24.52±0.01)mSv。2名观察者对2组CTA图像SPDA的主观评分结果一致性较好(Kappa=0.629、0.769),2组评分中位数均为5分;CTP组SPDA的CT值、CNR、SNR均高于对照组(P均0.05)。CTP组静脉期、平衡期的胰腺CT值、CNR、SNR均高于对照组(P均0.05)。结论 Revolution CT胰腺轴位灌注"一站式"成像,在获得稳定的胰腺CTP定量数据的同时,可提取图像质量相仿甚至更佳的胰腺3期强化图像,并可获得更优质的胰周CTA图像,有很好的临床应用前景。
[Abstract]:Objective to investigate the feasibility of "one-stop" imaging of Revolution CT pancreatic axial perfusion. Methods 13 patients (CTP group) receiving Revolution CT upper abdominal axial CT perfusion (CTP) scan were collected. The CTP parameters of the pancreas were measured, the optimal period CTA and 3 phase enhanced images were extracted, and the radiation dose of the whole perfusion period was recorded. The 3 phase enhancement of the whole abdomen during the same period was collected. 18 cases (control group) and CTA scans (control group), there were no lesions in the pancreas of group.2 with spiral scan mode. The consistency between the CTP parameters and the subjective score of the upper pancreatic and duodenal artery (SPDA) images was measured by 2 observers. The subjective score of the 2 groups of SPDA images, the CTA image SPDA, and the CT value of the 3 enhanced image of the pancreas, the noise of the image, CNR and SN were compared. The results of R. results showed that 2 observers measured the CTP parameters well (ICC 0.75). The effective radiation dose in the perfusion period was (24.52 + 0.01) mSv.2 names, and the subjective score of the 2 groups of CTA images was better (Kappa=0.629,0.769), the median of the 2 groups was 5, the CT value of CTP group SPDA, CNR, and SNR were higher than the control group (0.05). The pancreatic CT value, CNR, SNR in the balance period were higher than those of the control group (P 0.05). Conclusion Revolution CT pancreatic axis perfusion "one-stop" imaging can be used to obtain the stable pancreatic CTP quantitative data, and can extract the image quality similar even better 3 phases of pancreas, and obtain better quality peripancreatic CTA images. It has good clinical application. Prospects.
【作者单位】：大连医科大学附属第一医院放射科;
【分类号】：R816.5

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