|
|
|
| The predictive value of MRI signs and necrosis volume quantitative measurement for non-traumatic osteonecrosis of femoral head |
| HAO Li, WANG Qi |
| Department of Radiology, Longnan Hospital of Daqing City, Daqing Heilongjiang 163453, China |
|
|
|
|
Abstract Objective: To investigate the risk factors affecting the collapse of non-traumatic osteonecrosis of femoral head(ONFH). And assess the value of clinical application in predicting the collapse of ONFH. Methods: By the imaging diagnosis of early osteonecrosis(ARCOⅠ, Ⅱ) a total of 112 cases of patients(152 hips) were collected for follow-up observation. All patients underwent initial examination of hip with anteroposterior and frog-position X-ray and MRI scans at the time of diagnosis. To evaluate the collapse of the femoral head at each X-ray examination; observe the hip joint effusion, bone marrow edema, necrosis signal features, location of necrotic lesions and necrotic morphology at the first MRI images, and measure the volume of femoral head necrosis, calculate the percentage of necrosis volume. Nominal data were analyzed with the chi-square test and measurement data were analyzed with independent sample T-test. Logistic regression analysis was used to analyze the risk factors. Results: In 112 cases(152 hips), 62 hips were with femoral head collapse, 90 hips were not. In addition to the difference of sex(P=0.078), age(P=0.631), etiology(P=0.604) and necrotic signal comparison(P=0.071) between the collapse group and non-collapse group, other indicators were statistically significant. The total average of the necrosis volume percentage in the collapse and non-collapse groups were 40.1%±20.1%, 18.3%±19.8%, seperately. In addition to PIM quadrant comparison(P=0.143), the difference between collapse group and non-collapse group was statistically significant. ARCO stage, necrotic morphology, bone marrow edema, and necrosis of the total volume percentage, ASL quadrant necrosis volume percentage, PSL quadrant volume percentage of necrosis were statistically significant(P<0.05). Conclusion: MRI examination and quantitative measurement has important clinical value for evaluation and prediction of the collapse of femoral head, but various factors should be taken into account for predicting collapse of the femoral head, thus improving the accuracy of predictions.
|
|
Received: 16 December 2014
|
|
|
|
|
|
|
|
|
2015, Vol. 26 
