宝石能谱CT原子序数法与红外光谱法分析泌尿系结石成分的效果比较

目的 探讨宝石能谱CT原子序数法及红外光谱法分析泌尿系结石成分的效果,比较二者在尿路结石定性诊断的价值.方法 对260例尿路结石患者术前行宝石能谱C T泌尿系扫描,使用原子序数法鉴定结石成分;取石术后,使用红外光谱法分析结石成分作为金标准,分析两种方法对结石成分鉴定的一致性.结果 两种方法在鉴定结石类型方面一致性较好(Kappa=0.787,P<0.01),差异无统计学意义(χ2=6.581,P=0.254).宝石能谱CT原子序数法测得的结石晶体成分类型较红外光谱法要少,对于同一化学成分结石不同晶体结构组成的结石精确定量尚不如红外光谱法精确(一水草酸钙与二水草酸钙).结论 两种方法对尿路结石成分分析均具有临床意义,应根据实际情况选择结石分析方法.

Effects comparison of gemstone energy spectrum CT atomic number method and infrared spectroscopy for analyzing composition of urinary calculus

Objective To investigate the effects of gemstone energy spectrum CT atomic number method and infrared spec-troscopy for analyzing the composition of urinary calculi and to compare their values in qualitative diagnosis of urinary calculi .Meth-ods Two hundreds and sixty cases of urinary tract stones were performed the gemstone spectrum CT urinary scanning and the stone composition was identified by atomic number method .After removing stone ,the stone composition analyzed by infrared spec-troscopy served as the gold standard .Then the consistency identified by the two methods was analyzed .Results The Kappa consis-tency test results showed that the two kinds of method for identifying stone type had good consistency (Kappa=0 .787 ,P<0 .01) . The paired chi square test results showed that the difference of the two methods for identifying the stone type had no statistical sig-nificance(χ2 =6 .581 ,P=0 .254) .The stone crystal composition types measured by gemstone energy spectrum CT atomic number method were less than those measured by infrared spectroscopy .The precise quantification of the stones with different crystal struc-tures was not as accurate as that of infrared spectroscopy (calcium oxalate monohydrate and calcium oxalate dihydrate ) .Conclusion The two methods for analyzing theurinary stone composition all have clinical significance ,the stone analysis method should be se-lected according to the actual situation .