Sacro-Iliac Joint Sensory Block and Radiofrequency Ablation: Assessment of Bony Landmarks Relevant for Image-Guided Procedures

Figure 2

Quantification of sacral landmarks. (a) Distance from lateral margin of foramen to adjacent transverse sacral tubercle (DT), foraminal height (H), interforaminal distance (D), total distance from S1–S3 foramina (TD1–3), and transverse sacral tubercle (). Posterior view. (b) Intertubercular distance (IT) and intertubercular distance from TST1 to TST3 (IT1–3). Posterior view. (c) Distance from the level (black line) of TST2 to the inferior margin of the auricular surface of the sacro-iliac joint (IMAS). Posterolateral view.

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