Walker C W, FitzRandolph R L, Collins D N, Dalrymple G V
Department of Radiology, University of Arkansas for Medical Sciences, Little Rock.
Skeletal Radiol. 1991;20(6):403-7. doi: 10.1007/BF00191080.
Digital and manual subtraction images obtained during the arthrographic evaluation of 78 painful hip prostheses were reviewed retrospectively. Revision arthroplasty was performed in 53 of these cases, and the arthrographic and surgical findings were correlated. The digital and manual subtraction images were evaluated without knowledge of the surgical results using established criteria for component loosening. Digital subtraction arthrography of the femoral component demonstrated a 96% sensitivity and 100% specificity for the diagnosis of component loosening. Sensitivity and specificity for acetabular component loosening were 83% and 80%, respectively. Plain film subtraction of the femoral component demonstrated a 79% sensitivity and 100% specificity; the sensitivity and specificity for the acetabular component were 75% and 80%, respectively. The difference between detection of femoral component loosening on digital as opposed to manual subtraction images was statistically significant (P less than 0.05). This study demonstrate that digital subtraction improves the evaluation of femoral component loosening in painful hip prostheses.
回顾性分析了78例疼痛性髋关节假体关节造影评估期间获得的数字减影和手工减影图像。其中53例进行了翻修关节成形术，并将关节造影和手术结果进行了对比。在不了解手术结果的情况下，使用既定的假体松动标准对数字减影和手工减影图像进行评估。股骨假体的数字减影关节造影对假体松动诊断的敏感性为96%，特异性为100%。髋臼假体松动的敏感性和特异性分别为83%和80%。股骨假体的平片减影敏感性为79%，特异性为100%；髋臼假体的敏感性和特异性分别为75%和80%。数字减影与手工减影图像上股骨假体松动检测之间的差异具有统计学意义（P小于0.05）。本研究表明，数字减影可改善对疼痛性髋关节假体股骨假体松动的评估。
