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. Author manuscript; available in PMC: 2019 Dec 1.
Published in final edited form as: Semin Ultrasound CT MR. 2018 Sep 26;39(6):570–586. doi: 10.1053/j.sult.2018.09.003

Figure 9.

Figure 9.

Psoas sign. Sagittal T2 FS (A) and T1 post FS (B) images of the lumbar spine showing abnormal fluid signal and enhancement of the L3 and L4 vertebral bodies as may be seen with DOM as well as with Modic type 1 fibrovascular reactive marrow edema. C) Axial T2 image at the L3 vertebral level shows asymmetric right psoas muscle T2-hyperintense edema consistent with the ‘psoas’ sign, favoring a diagnosis of early DOM. D) Axial T1 post FS image at same level as ‘C’ reveals abnormal enhancement corresponding to myositic edema seen on T2.