Figure 1. Patient imaging data. A–C): Color ultrasound of the urinary system. (A) The arrow indicates right hydronephrosis; (B, C) Arrows point to right ureteral dilatation. D–K): CT and contrast-enhanced CT. (D) CT transverse section, the arrow points to the right hydronephrosis; (E–G) Enhanced CT transverse section arterial phase, venous phase, and delayed phase, and the arrow points to the right hydronephrosis; (H) CT median sagittal (I–K) Arterial phase, venous phase, and delayed phase in the mid-sagittal enhanced CT images, arrows point to the dilation of the right lower ureter. L, M): MRI of the urinary tract. (L) The arrow points to the ureteral stenosis, and hydronephrosis and ureteral dilatation in the lower segment of the stenosis can be seen; (M) The arrow points to hydronephrosis.