ObjectiveTo study the anatomic and morphological features of the iliolumbar ligaments and its relationship with lumbar segment by high field strength magnetic resonance. MethodsMRI imaging data of 261 patients with lumbar sacral vertebra were retrospectively studied. The DR images of 153 patients with S1, 108 patients with L5 and patients with MRI were observed. ResultsThe anatomical morphology: ①single beam 63 cases; ②double beam 182 cases; ③rare type in 11 cases, all of them originate from the transverse end, stop at the edge of the spine after iliac crest in the trailing edge or iliac. Among the S1 lumbar group, there were 146 cases of bilateral iliolumbar ligament originated from L6 transverse process, and 7 cases of bilateral iliolumbar ligament from L5 transverse process. Among the L5 sacralization group there were 94 cases of bilateral iliolumbar ligament originated from L4 transverse process, and 9 cases of bilateral iliolumbar ligaments from L5 transverse process, and 5 cases showed no clear. ConclusionThe middle and high field MRI lumbar axial and coronal imaging can clearly show the anatomic and morphological characteristics of the lumbar and sacral vertebra of the vertebral body.

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