能谱CT物质分离技术克服肾囊肿伪强化的临床评估

发布时间：2018-05-28 23:37

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】：目的评估能谱CT物质分离技术克服肾囊肿伪强化的价值。方法 80例肾囊肿患者接受能谱GSI模式平扫及双期增强扫描,共入组75个囊肿,按囊肿大小分为3组,A组(n=25)肾囊肿直径0.5~1.5cm、B组(n=25)直径1.5~2.5cm、C组(n=25)直径2.5~3.5cm。采用GSI Viewer分析软件生成碘、水基图,记录单能谱70keV图像上各期肾囊肿的CT值及碘水基值,比较各组肾囊肿平扫和增强双期CT值、碘水基值、CT值和碘水基值差值的差异。结果3组间实质期与平扫CT值差值总体差异有统计学意义(F=204.128,P0.001),且两两比较差异均有统计学意义(P均0.001)。增强后A、B组实质期CT值增加均超过10HU,出现了伪强化现象,C组CT值增加小于10HU,无伪强化现象。各组肾囊肿平扫、皮质期及实质期间碘基值差异有统计学意义(P均0.001)。3组平扫和增强双期之间碘基值的差值均在10(100μg/cm~3)内,且差值平均值A组B组C组(P均0.05)。A组肾囊肿皮质期及实质期水基值低于平扫(P均0.05),但差值均在10mg/cm~3以内。结论能谱CT物质分离技术测定肾囊肿各期碘、水基值时同样会发生碘水基值的"漂移",肾囊肿越小其发生"漂移"的程度越大,碘基值发生漂移的程度受肾囊肿大小的影响较水基值更明显。
[Abstract]:Objective to evaluate the value of energy dispersive CT technique in overcoming renal cyst pseudoenhancement. Methods 80 patients with renal cysts underwent EDS GSI mode plain scan and dual phase enhanced scan. 75 cysts were divided into 3 groups according to the size of cysts. According to the size of cysts, 75 cysts were divided into 3 groups. GSI Viewer analysis software was used to generate iodine and water base maps. Ct values and iodine water base values of renal cysts were recorded on single energy dispersive 70keV images. The difference of CT value, iodine water base value and iodine water base value between different groups of renal cyst plain scan and enhanced double phase CT were compared. Results the difference of CT value between the three groups was statistically significant (P < 0.05), and the difference between the two groups was statistically significant (P = 0.001). After contrast enhancement, the CT value of parenchymal phase in group A B increased more than 10 HU. there was a false enhancement phenomenon in group C and the increase of CT value in group C was less than 10 HU.There was no false enhancement phenomenon. In each group, the difference of iodine base value between plain scan and enhancement phase was within 10 ~ 100 渭 g / cm ~ (3). There was significant difference in iodine base value between cortex and parenchymal period (P = 0.001C / cm ~ (3), P = 0. 001g / cm ~ (3), P < 0. 05). The average value of water base in group A was lower than that in plain scan (P < 0.05), but the difference was less than that of 10mg/cm~3 in group A (P < 0.05) and in group A (P < 0.05). The water base values in cortical and parenchymal phase of renal cyst in group A were lower than those in plain scan (P < 0.05). Conclusion in the determination of iodine in different stages of renal cysts by energy dispersive CT, the "drift" of iodide water base value will also occur when the water base value of renal cysts is smaller, and the degree of "drift" will increase with the decrease of renal cysts. The extent of iodide drift was more affected by the size of renal cyst than that of water.
【作者单位】：吉林大学中日联谊医院放射科;吉林大学中日联谊医院手术室;
【基金】：吉林省科技发展计划项目(20160101074JC)
【分类号】：R692;R816.7

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