Magnetic resonance imaging (MRI) for detection of active sacroiliitis--a prospective study comparing conventional radiography, scintigraphy, and contrast enhanced MRI.

摘要: Objective. Sacroiliitis is often difficult to diagnose in the absence of radiographic alterations. For diagnosis active sacroiliitis. plain radiography, scintigraphy, and contrast enhanced magnetic resonance imaging (MRI) were evaluated a prospective study. Methods. In 44 consecutive patients with complete clinical laboratory evaluation, radiographs, quantitative sacroiliac (SI) MRI performed evaluate contribution these techniques Scintiscanning done 20 control subjects define normal range findings. We determined sensitivity specificity for each method using reference standard based on symptoms inflammatory low back pain or without signs, followup during 1.5-2.5 years confirm diagnosis. Results. was most sensitive (95%) superior SI scintigraphy (48%) conventional radiography (19%) detection confirmation assessment had higher (100%) than (97%) (47%). At repeat after 2-30 months, there persistent pathologic signal intensity subchondral bone area despite clinically successful antiinflammatory drug therapy. Conclusion. changes synovial portion marrow, radiography. picks up an additional 75% early cases not diagnosed by Scintigraphy only limited value. Persistent marrow seems be closely associated previous episodes, thus limiting Based our findings we suggest algorithm evaluation suspected