不同重建算法对肺气肿CT定量测量的影响  

Quantitative analysis of emphysema using MSCT：influence of different reconstruction algorithms

作　　者：邢志珩[1] 万业达 范勇[1] 王恺[1] 程湘[1] 赵新骞[1] 

机构地区：[1]天津市海河医院放射科天津市呼吸疾病研究所,天津300350 [2]天和医院放射科

出　　处：《实用放射学杂志》2013年第9期1434-1437,共4页Journal of Practical Radiology

摘　　要：目的 采用MSCT对肺气肿病人行定量测定,评估不同重建算法对于肺气肿CT定量测定结果的影响.方法 对30例肺气肿病人进行胸部MSCT扫描,原始数据分别经标准算法、肺算法及锐利算法重建,采用后处理技术对图像进行重组、分割并保留双肺部分,测定肺气肿指数（EI）、全肺平均肺衰减值（MLA）、全肺平均肺衰减值的标准差（SDMLA ）及全肺容积（TLV）,比较各组之间EI、MLA、SDMLA及TLV的差异性.结果 EI的差异在各重建算法组之间均具有统计学意义（P＜0.05）.MLA的差异标准组与锐利组之间没有统计学意义（P＞0.05）,而其他各组之间差异均具有统计学意义（P＜0.05）.SDMLA的差异各组之间均具有统计学意义（P＜0.05）.TLV的差异各组之间均无统计学意义（P＞0.05）.结论 肺气肿CT定量测定中不同原始数据重建算法的选择能够影响EI值、MLA值,而对TLV值的影响不大.Objective To compare the influence of different reconstruction algorithms on quantitative emphysema analysis in using MSCT. Methods 30 patients underwent MSCT examination. The raw data were reconstructed by using different algorithms： stand ard algorithm, lung algorithm and edge algorithm. CT images were analyzed by using quantification post-processing software and re- tained the lungs section, and provided emphysema index （EI）, mean lung attenuation（ MLA）, standard deviation of mean lung atten- uation （SDMLA） and total lung volume （TLV）. The differences among the results of above groups were evaluated. Results The differences in EI, among the 3 groups, had statistical significance （P〈0.05）. There was no statistical significance in terms of difference in MLA between the standard algorithm group and the edge algorithm group（P〉0.05）. There were statistical significance in terms of differences in MLA between the other groups（P〈0.05）. The differences in SDMLA among the groups had statistical sig nifieanee（ P〈0.05 ）. The differences in TLV among the groups had no statistical significance（P〉0.05 ）. Conclusion The different reconstruction algorithms may affect the value of EI and MLA. It has unnoticeable effect on TLV in the quantitative analysis of emphysema.

关 键 词：重建算法 肺气肿 计算机体层成像 

分 类 号：R563.3[医药卫生—呼吸系统] R814.42[医药卫生—内科学]