Fig. 4

Preoperative and postoperative radiological characteristics of PPECD-VBD. a Preoperative CT sagittal image.b Postoperative CT sagittal image. c Preoperative CT axial image of the surgical segment. d Postperative CT axial image of the surgical segment. e Preoperative MRI axial image of the surgical segment. f Postperative MRI axial image of the surgical segment