Abstract
Objective:To investigate the diagnostic value of dual-phase contrast-enhanced CT histogram parameters in differentiating gastrointestinal heterotopic pancreas(HP)from gastrointestinal stromal tumors(GIST).Methods:Imaging data from 20 patients with pathologically confirmed gastrointestinal HP,across two enhancement phases,were collected and compared with those of 43 gastrointestinal GIST cases of similar size.Parameters analyzed included lesion location,morphology,and CT histogram features(mean,standard deviation(SD),minimum,maximum,skewness,kurtosis,and entropy).Differences in these pa-rameters between the two groups were assessed for statistical significance,and their diagnostic efficacy was evaluated.The De-long test was used to compare differences in diagnostic efficacy.Differences in these parameters between the two groups were assessed for statistical significance,and their diagnostic efficacy was evaluated.Results:The LD/SD ratios in the HP and GIST groups were 1.51(1.34,2.02)and 1.22(1.07,1.37),respectively(z=-4.098,P<0.01).For the arterial phase,mean values were(70.31±15.79)HU and 46.17(39.13,53.12)HU(z=-4.430,P<0.01),with maximum values at(106.89±20.50)HU and(81±20.89)HU(t=4.598,P<0.01)and SD at 13.65(9.69,17.83)and 11.25±2.52(z=-2.008,P=0.045).In the venous phase,mean val-ues were(78.66±14.29)HU and(59.01±11.42)HU(t=5.863,P<0.01),maximum values at(108.70±13.90)HU and(90.14±16.17)HU(t=4.424,P<0.01),minimum values at 29.50(21.00,53.50)HU and(21.88±15.24)HU(z=-2.349,P=0.019),and SD at 12.66±2.79 and 11.16±2.45(t=2.162,P=0.035).Kurtosis values were 4.77(3.38,7.43)and 3.19(2.77,4.42)for HP and GIST,respec-tively(z=-2.525,P=0.012).Among these,the areas under the ROC curve(AUC)for diagnosing HP were 0.822,0.849,0.833,0.847,and 0.806 for the LD/SD ratio,arterial phase mean and maximum values,and venous phase mean and maximum val-ues,respectively.Conclusion:Dual-phase contrast-enhanced CT histogram analysis provides a useful tool for distinguishing HP from GIST,with mean and maximum values across both phases exhibiting high diagnostic performance.关键词
内脏异位综合征/胰腺/体层摄影术,螺旋计算机Key words
Heterotaxy Syndrome/Pancreas/Tomography,Spiral Computed分类
临床医学
