The puncture plan to the right branch of PV according to the puncture needle rotation angle based on MDCT and the actual implementation The rotation angle of the puncture needle Before TIPS (n = 47) After TIPS (n = 47) p Right rotation angle 30.1 ± 5.2 (20 - 42) 25.2 ± 7.1 (10 - 45) 0.0001 Front rotation angle 34.6 ± 4.6 (23 - 46) 35.3 ± 5.9 (21 - 49) 0.36 Comment: In the planning, the puncture needleto the right branch of PV with the averageor right rotation angle was 30.1° and front rotation angle was 34.6°.