Effect Of TrackVis-based Angle Threshold On DTI Fiber Tractography In Uterine Fibroid

Objective :To investigate the effect of TrackVis-based angle threshold on DTI fiber tractography in uterine fibroid.Methods: The routine MRI and DTI were performed on 25 patients with uterine fibroids.DTI fiber tractography were performed with angle threshold at 25°?30°?35°?40°?45°,respectively.The length of the longest fiber bundle(LLFB),FA value,density of fiber bundle(DFB),ADC value and the average length of fiber bundles(ALFB)were measured and compared.Results : LLFB,DFB and the ALFB were increased as the angle threshold increased,while the the FA value decreased.There were no statistically significant differences in FA value between 40° group and 45°group.Conclusion: Angle threshold can affect the DTI-derived FA values,LLFB,DFB and the ALFB,length of fiber bundles and density were maximum and FA value tended to be stable at 45 °.45 ° of Angle threshold may be optimum on DTI fiber tractography in uterine fibroid.