case_images: PMC11303053_01
case_images: Exclusion criteria for this study.
case_images: PRM2024-8064804.001.jpg
case_images: PMC11303053_01_PRM2024-8064804.001.jpg
case_images: fig1
case_images: Five patients were excluded from this study based on exclusion criteria (Figure1).Twenty-seven patients, mean age, 56 years old (range 39-87 years) old, twenty females (74.1%), and seven males (25.9%), were included in the study.
case_images: (a, b) 3D-CBCT images of two patients who received sacroiliac joint injections (the arrow indicates contrast spread from sacroiliac joint into posterior S1 neuroforamen).
case_images: PRM2024-8064804.002.jpg
case_images: PMC11303053_01_PRM2024-8064804.002.jpg
case_images: fig2
case_images: The images of three of the four patients with contrast spread in posterior S1 neuroforamen are shown in Figures 2, 3, 4. In Figure 2, patients A and B: 3D-CBCT showed contrast in the sacroiliac joints with spread into the posterior S1 neuroforamen.  Figure 3, patient C: fluoroscopy image showed contrast from sacroiliac joint spread to left posterior S1 neuroforamen. 3D-CBCT images in the axial and coronal views demonstrate contrast spread to the posterior S1 neuroforamen.
case_images: (a): Contrast spread from sacroiliac joint to S1 neuroforamen on an oblique view on the fluoroscopic image. (b): 3D-CBCT image, axial view of the sacroiliac iliac joint. Contrast spread in the sacroiliac joint and S1 neuroforamen. (c): 3D-CBCT image, coronal view of sacroiliac joint. Contrast spread in the sacroiliac joint and S1 neuroforamen (arrow indicating contrast spread into the S1 neuroforamen).
case_images: PRM2024-8064804.003.jpg
case_images: PMC11303053_01_PRM2024-8064804.003.jpg
case_images: fig3
case_images: The images of three of the four patients with contrast spread in posterior S1 neuroforamen are shown in Figures 2, 3, 4. In Figure 2, patients A and B: 3D-CBCT showed contrast in the sacroiliac joints with spread into the posterior S1 neuroforamen.  Figure 3, patient C: fluoroscopy image showed contrast from sacroiliac joint spread to left posterior S1 neuroforamen. 3D-CBCT images in the axial and coronal views demonstrate contrast spread to the posterior S1 neuroforamen.
case_images: 3D-CBCT images (a):Arrow indicating contrast spread in the right sacroiliac joint tracking into the right posterior S1 neuroforamen. The similar level axial plane on the lumbar spine MRI (b) demonstrating posterior sacroiliac ligament (solid line) which corresponds to this contrast track (dotted line indicating the track through which contrast spreads from the sacroiliac joint into posterior S1 neuroforamen).
case_images: PRM2024-8064804.004.jpg
case_images: PMC11303053_01_PRM2024-8064804.004.jpg
case_images: fig4
case_images: The images of three of the four patients with contrast spread in posterior S1 neuroforamen are shown in Figures 2, 3, 4. In Figure 4, patient D: 3D-CBCT showed contrast in the sacroiliac joints with spread into the posterior S1 neuroforamen.