CT测量成人肾脏深度与估算公式的对比研究

Comparative study of CT measurement of adult kidney depth with estimation formula

目的分析肾脏深度不同估算公式与计算机断层扫描(computed tomography,CT)实测值的相关性及一致性,探讨适合本地区的最佳肾脏深度计算公式。方法回顾性分析2019年1月至2024年1月在嘉兴市第一医院进行肾动态显像成人患者213例的临床资料,获取同期腹部CT影像资料,记录患者的性别、年龄、体质量及身高,通过CT测量患者身体厚度及肾脏深度。利用7种估算公式(Tonnesen公式、李乾公式、Taylor公式、Inoue公式、Xue JJ公式、李氏方程及Ma G’S公式)计算双侧肾脏深度,将公式计算所得肾脏深度与CT实测值进行配对样本t检验、Pearson相关性分析和Bland-Altman一致性分析。结果7种估算公式计算的肾脏深度与CT实测值间均存在相关性且所有计算值均低于CT实测值。相关性分析结果显示Ma G’S公式与CT实测值的相关系数高于其他公式。Tonnesen公式计算的肾脏深度与CT实测值间的偏倚最大,Ma G’S公式计算肾脏深度与CT实测值间偏倚最小。结论Ma G’S公式引入身体厚度作为一个关键参考变量,相较于其他6种计算公式,在估算肾脏深度方面有更高的准确性和可靠性,在临床实践中具有更广泛的适用性。

Objective To analyze the correlation and consistency between different kidney depth estimation formulas and computed tomography(CT)measurement of kidney depth,discussing the best kidney depth calculation formula for this region.Methods A total of 213 patients who underwent renal dynamic imaging in the First Hospital of Jiaxing from January 2019 to January 2024 were retrospectively included in this study.The abdominal CT image data of the same period were obtained,and the gender,age,height and weight were recorded.The patient’s body thickness and kidney depth were measured by CT.Seven calculation formulas(Tonnesen formula,Li Qian formula,Taylor formula,Inoue formula,Xue JJ formula,Li’s equation and Ma G’s formula)were used to estimate the kidney depth.Paired sample t-test,Pearson correlation analysis and Bland-Altman consistency analysis were performed between the kidney depth calculated by the equation and the kidney depth measured by CT.Results There was a correlation between the estimated values calculated by the calculation formulas and actual CT measurements,and the kidney depth calculated by the seven formulas were lower than the CT measurements.The results of correlation analysis showed that the correlation coefficient between Ma G’s formula and CT measurements was better than other formulas,and the correlation coefficients of Tonnesen formula and Inoue formula were consistent.The bias between the kidney depth calculated by Tonnesen formula and the CT measured value is the largest,and the bias between the kidney depth calculated by Ma G’s formula and the CT measured value is the smallest.Conclusion The Ma G’S formula introduces body thickness as a key reference variable for calculating kidney depth.Compared to the other six calculation formulas,it has demonstrated higher accuracy and reliability in estimating kidney depth,thereby having a broader applicability in clinical practice.