Fig. 3

Two patients’ pre- and postoperative images. a–d Patient 1,the case in the left hip was classified as JIC C1 NONFH. e–h Patient 2, the case in the left hip was classified as JIC C2 NONFH. The top left panels (a, e) show the preoperative T2-weighted MRI scan. The top right panels (b, f) show the preoperative X-ray. The bottom panels show the postoperative X-ray, including patient 1’s left hip after the LBT at the 4-week follow-up (c, d) and patient 2’s left hip after the LBT at the 4-week follow-up (g, h).