宝石能谱CT去除金属植入物伪影的实验研究

目的探讨宝石能谱CT在去除金属植入物伪影方面的价值。方法含碘对比剂溶液用蒸馏水稀释成8种不同浓度（mg/ml）置于50 ml硬塑料管体模中,将各支硬塑料管嵌入塑料模具及带有金属内固定猪骨的软组织中,分别进行能谱CT及常规扫描,测量不同扫描方式下塑料管体模内试剂的CT值。应用设计资料的非参数设计中的配对设计的秩和检验方法对常规扫描及GSI能谱扫描的8支浓度塑料管内试剂的在植入金属内固定前、后CT值进行统计学分析,并进行两两多重比较。结果在相同KV下,GSI能谱扫描80、100、120、140 Kev下CTGSI后与CTGSI前相比较,P值均大于0.05,差别无统计学意义;常规80、100、120、140 KVP扫描下CT普通后与CT普通前相比较,P值均小于0.05,差别有统计学意义。结论宝石能谱CT明显减少金属植入物伪影。

The experimental study of reducing metallic implants artifacts by Gemstone spectral imaging

Objective To assess the effect on reducing metallic implants artifacts by Gemstone spectral imaging.Methods The solution containing iodine contrast agent broke up into eight different concentrations(mg/ml),which was loaded into the hard plastic pipe phantom of 50 ml.Every hard plastic pipe phantom,which was loaded into mould of plastics or the soft tissues of the pig with the metallic implants artifacts,was scanned by Gemstone spectral imaging or the Conventional scan.The CT value of the agent in the hard p...