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

Table 2

Quantification of parameters of posterior sacral foramina.

PSF	Mean foraminal height ± SD (mm)			Mean distance from lateral margin of PSF to TST ± SD (mm)
	All (M + F)	Male	Female	All (M + F)	Male	Female
S1
S2
S3
S4

PSF, posterior sacral foramen (S1–S4); TST, transverse sacral tubercle; significant () difference between males and females.