Value of histogram analysis of susceptible signal intensity in differentiating papillary from chromophobe renal cell carcinoma / 中华放射学杂志

ABSTRACT

Objective To evaluate the feasibility of histogram analysis of susceptible signal intensity in differentiating papillary (pRCC) from chromophobe renal cell carcinoma(ChRCC). Methods Thirteen cases with pRCC and 9 cases with ChRCC, who underwent susceptible-weighted imaging(SWI), MR common scanning and enhancement, were assessed retrospectively. The histogram parameters of susceptible signal intensity were measured, including maximum, minimum, mean, median, skewness and kurtosis. The independent samples t test(normal distribution) and Mann-Whitney rank sum test(skewed distribution) were used to compare the differences in SWI parameters between pRCCs and ChRCCs. Receiver operating characteristic curve was used to evaluate the efficiency of the whole-tumor SWI parameters in differentiating pRCCs from ChRCCs. Results The significant differences of the minimum, mean, median and skewness between pRCCs and ChRCCs were present(P0.05). In all the histogram parameters, the area of ROC curve of mean value was largest(0.80). The sensitivity of minimum value (84.62％) was the highest and and the specificity of skewness(100.00％) was the highest. Conclusion Histogram analysis of susceptible signal intensity can help differentiate pRCCs from ChRCCs.