Clinical Diagnostic Value of CT Combined with MR in Grading Sacroiliac Joint Lesions in Ankylosing Spondylitis

Xuenan WU; Huawei SU; Man LI

doi:10.12259/j.issn.2095-610X.S20251013

Volume 46 Issue 10

Oct. 2025

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Xuenan WU, Huawei SU, Man LI. Clinical Diagnostic Value of CT Combined with MR in Grading Sacroiliac Joint Lesions in Ankylosing Spondylitis[J]. Journal of Kunming Medical University, 2025, 46(10): 106-112. doi: 10.12259/j.issn.2095-610X.S20251013

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Xuenan WU, Huawei SU, Man LI. Clinical Diagnostic Value of CT Combined with MR in Grading Sacroiliac Joint Lesions in Ankylosing Spondylitis[J]. Journal of Kunming Medical University, 2025, 46(10): 106-112. doi: 10.12259/j.issn.2095-610X.S20251013

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Clinical Diagnostic Value of CT Combined with MR in Grading Sacroiliac Joint Lesions in Ankylosing Spondylitis

doi: 10.12259/j.issn.2095-610X.S20251013

Xuenan WU¹,
Huawei SU¹,
Man LI^{2
,
,}

1.
Department of Radiology, The Third People’s Hospital of Haikou, Haikou Hainan 571100
2.
Department of Radiology Diagnosis, The Hospital of the People’s Government of Tibet Autonomous Region in Chengdu, Chengdu Sichuan 610041, China

Received Date: 2025-01-15
Publish Date: 2025-10-28

Abstract

Abstract

Objective To explore the value of CT combined with MRI （hereinafter referred to as combined diagnosis） in diagnosing sacroiliac joint lesions in ankylosing spondylitis （AS）. Methods A retrospective study selected CT and MRI examination data from 102 AS patients with sacroiliac joint lesions admitted to the Third People's Hospital of Haikou, Hainan Province between January 2021 and July 2023. The study compared the grading and detection rates of various signs using CT, MRI, and combined diagnosis. Results MRI showed higher detection rates for AS sacroiliac joint lesions in grades I-II, bone marrow edema, tendon and ligament attachment point inflammation, subchondral cartilage destruction, synovial thickening, and subchondral fat deposition compared to CT （P < 0.05）. In contrast, CT demonstrated higher accuracy in detecting joint surface sclerosis, subchondral bone erosion/destruction, and joint surface hyperplasia compared to MRI （P < 0.05）. Combined diagnosis showed significantly higher grading and detection rates of AS sacroiliac joint lesion signs compared to MRI or CT alone （P < 0.05）. Conclusion MRI has high detection rates for early AS sacroiliac joint lesions, CT exhibits high sensitivity for joint surface hyperplasia, sclerosis, erosion, and destruction, and combined diagnosis demonstrates superior efficacy compared to MRI or CT individually.
- CT,
- Magnetic resonance imaging,
- Ankylosing spondylitis,
- Sacroiliac joint lesions,
- Bone marrow edema

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References(20)

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