CAJ | 학술논문

目的：探讨双能CT扫描区分铋造影剂和钆造影剂的可行性。资料与方法将两组不同比例的铋造影剂和钆造影剂混合物置于试管内，第一组为碘海醇注射液和钆特酸葡胺注射液，体积比分别为0∶1、1∶6、1∶1、6∶1、1∶0；第二组为碘海醇注射液和果胶胶体铋溶液，质量浓度分别为0∶1、1∶6、1∶1、6∶1、1∶0。使用双能CT扫描后，以80 keV进行单能量图像重建，应用Liver VNC软件将双能数据进行虚拟平扫及碘含量分析。结果在80 keV虚拟单能量成像的条件下，第一组混合液的CT值为379~383 HU，第二组混合液的CT值为170~173 HU，且两组实际碘浓度与测量碘浓度之间差异均无统计学意义（P>0.05）。物质分离图像中，碘造影剂和钆造影剂区分不明显，碘和铋造影剂区分明显。结论双能CT可以区分铋和钆这两种衰减率不同的造影剂，原子序数相差越大，区分效果越明显。
목적：탐토쌍능CT소묘구분필조영제화구조영제적가행성。자료여방법장량조불동비례적필조영제화구조영제혼합물치우시관내，제일조위전해순주사액화구특산포알주사액，체적비분별위0∶1、1∶6、1∶1、6∶1、1∶0；제이조위전해순주사액화과효효체필용액，질량농도분별위0∶1、1∶6、1∶1、6∶1、1∶0。사용쌍능CT소묘후，이80 keV진행단능량도상중건，응용Liver VNC연건장쌍능수거진행허의평소급전함량분석。결과재80 keV허의단능량성상적조건하，제일조혼합액적CT치위379~383 HU，제이조혼합액적CT치위170~173 HU，차량조실제전농도여측량전농도지간차이균무통계학의의（P>0.05）。물질분리도상중，전조영제화구조영제구분불명현，전화필조영제구분명현。결론쌍능CT가이구분필화구저량충쇠감솔불동적조영제，원자서수상차월대，구분효과월명현。
Purpose To evaluate the feasibility of using dual-energy CT scanner to differentiate two contrast media bismuth and gadolinium. Materials and Methods Two phantoms containing contrast media of different ratio were scanned on dual-energy CT. Group 1 was mixture of iodine and gadolinium solution with volume ratio of 0∶1, 1∶6, 1∶1, 6∶1 and 1∶0. Group 2 was mixture of iodine and bismuth solution with mass ratio of 0∶1, 1∶6, 1∶1, 6∶1, 1∶0. Monoenergetic image reconstruction was performed at 80 keV. Liver VNC software was used for virtual scanning and iodine concentration analysis. Results Under 80 keV reconstruction, the measured CT attenuation of Group 1 was 379-383 HU, and 170-173 HU in group 2. The iodine concentration of two groups was not signiifcantly different between the calculated and actual iodine concentration (P>0.05). The dual-energy CT can distinguish two contrast media. Iodine and gadolinium contrast media were not statistically different, while iodine and bismuth contrast media agent could be easily differentiated. Conclusion Dual-energy CT can distinguish two contrast media with different attenuation.