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强直性脊柱炎(ankylosing spondylitis,AS)是血清阴性脊柱关节病(seronegative spondylarthropathy)中最常见的一种类型,通常累及骶髂关节、脊柱、髋关节及其他外周关节等部位~([1])。其基本病理变化包括炎症反应、骨化修复和钙化~([2])。这些病理改变常发生于肌腱附着点、滑膜和软骨关节处,产生特征性影像学特点~([2])。X线和MRI是AS诊断及疗效评价最常用的检查手段。然而,由于普通X线检查只能发现由炎症反应导致的骨性结构破坏而非炎症反应本身,且不能显示软组织的病理改变,因此其在AS诊疗中的
Ankylosing spondylitis (AS) is the most common type of seronegative spondylarthropathy, and usually involves sacroiliac joints, spine, hip and other peripheral joints. (1) . The basic pathological changes include inflammation, ossification and calcification ~ ([2]). These pathological changes often occur in tendon attachment points, synovial and cartilage joints, resulting in characteristic imaging features ~ ([2]). X-ray and MRI are the most commonly used means of diagnosis and evaluation of AS. However, the common X-ray examination can only find the destruction of the bony structure caused by inflammatory reaction rather than the inflammatory reaction itself, and can not show the pathological changes of soft tissue, so in AS treatment