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Role of Diffusion-Weighted MRI in the Detection of Early Active Sacroiliitis

Zulkif Bozgeyik1, Salih Ozgocmen2 and Ercan Kocakoc1

1 Department of Radiology, Faculty of Medicine, Firat University, 23119, Elazig, Turkey.
2 Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Firat University, Elazig, Turkey.


Figure 1
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  		Fig. 1A —26-year-old man with early active sacroiliitis. STIR (A) and fat-saturated fast spin-echo T2-weighted (B) images show hyperintense lesions consistent with bone marrow edema in sacral and iliac aspects of sacroiliac joints.

 

Figure 2
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  		Fig. 1B —26-year-old man with early active sacroiliitis. STIR (A) and fat-saturated fast spin-echo T2-weighted (B) images show hyperintense lesions consistent with bone marrow edema in sacral and iliac aspects of sacroiliac joints.

 

Figure 3
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  		Fig. 1C —26-year-old man with early active sacroiliitis. Contrast enhanced T1-weighted image shows enhancement in lesions.

 

Figure 4
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  		Fig. 1D —26-year-old man with early active sacroiliitis. Lesions are hyperintense on diffusion-weighted images at b values of 1,000 (D), 600 (E), and 100 (F) s/mm2.

 

Figure 5
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  		Fig. 1E —26-year-old man with early active sacroiliitis. Lesions are hyperintense on diffusion-weighted images at b values of 1,000 (D), 600 (E), and 100 (F) s/mm2.

 

Figure 6
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  		Fig. 1F —26-year-old man with early active sacroiliitis. Lesions are hyperintense on diffusion-weighted images at b values of 1,000 (D), 600 (E), and 100 (F) s/mm2.

 

Figure 7
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  		Fig. 2A —34-year-old woman with chronic low back pain of mechanical origin. Sacroiliac joints and subarticular areas were normal. Black-and-white apparent diffusion coefficient (ADC) map shows 12 regions of interest (ROIs) placed in subarticular surface of sacroiliac joints.

 

Figure 8
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  		Fig. 2B —34-year-old woman with chronic low back pain of mechanical origin. Sacroiliac joints and subarticular areas were normal. Color ADC map shows ADC values of ROIs in normal-appearing areas.

 

Figure 9
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  		Fig. 3A —26-year-old man with early active sacroiliitis. Black-and-white apparent diffusion coefficient (ADC) map shows placement of regions of interest over affected areas.

 

Figure 10
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  		Fig. 3B —26-year-old man with early active sacroiliitis. Color ADC map shows increased ADC values in affected areas (lesions).

 

Figure 11
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  		Fig. 4A —20-year-old man with early active sacroiliitis. STIR (A) and fat-saturated fast spin-echo T2-weighted (B) images show hyperintense lesions in sacral and iliac bones of right sacroiliac joint.

 

Figure 12
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  		Fig. 4B —20-year-old man with early active sacroiliitis. STIR (A) and fat-saturated fast spin-echo T2-weighted (B) images show hyperintense lesions in sacral and iliac bones of right sacroiliac joint.

 

Figure 13
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  		Fig. 4C —20-year-old man with early active sacroiliitis. Black-and-white apparent diffusion coefficient (ADC) map shows hyperintense lesions in affected areas.

 

Figure 14
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  		Fig. 4D —20-year-old man with early active sacroiliitis. Color ADC map shows increased ADC values in affected areas.

 

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