Study On MRI T2map Imaging Of Cartilage And Micro Bone Structure In Necrosis Of The Femoral Head

The First Section:Study on cartilage and bone microstructure of normal femoral head and necrosis of femoral headObjectiveAnalysis of avascular necrosis of the femoral head side group and the normal side in the control group, the cartilage and bone trabecula structural MRI morphological changes and measurement of quantitative data, there were no differences in?MethodsChoice in February 2013 and 2015 February in the third orthopaedics of the First Affiliated Hospital of Guangzhou University of traditional Chinese medicine diagnosis in 20 hips avascular necrosis of the femoral head (Arco stage II) cases and 20 femoral head in the normal control group, aged 20-50 years old, all cases underwent MRI examination. The calculation of necrosis of femoral head in experimental group and normal control group of quantitative measurement of trabecular bone structure of the MRI data. All the selected necrosis and normal subjects were excluded on the basis of observation of disease osteoporosis and other effects.ResultsT2 map value results showed the lesions of cartilage, subchondral bone T2 map values and normal group, the cartilage and subchondral bone T2 value had little difference, P values are greater than 0.05, no significant difference. The necrotic bone microstructure and normal femoral head bone microstructure in morphology and quantitative study were significantly, P values were less than 0.05.The Second Section: Study on the relationship between ARCO staging value of femoral head cartilage and bone trabecular T2 mapObjectiveThe difference between normal and different stages of ARCO under the condition of necrosis of the femoral head cartilage and subchondral bone between the T2 value of map. To observe the changes of morphology mainly hip cartilage T2 pseudo color color, Quantitative study mainly focuses on the analysis of the normal femoral bone, avascular necrosis of the femoral head different ARCO stage under the condition of cartilage and subchondral bone T2 map values between quantitative index difference and correlation research.MethodsIn February 2013 and 2015 February in the third Department of orthopaedics of the First Affiliated Hospital of Guangzhou University of traditional Chinese medicine different Arco stage avascular necrosis of the femoral head (ARCO I, ARCOII. ARCOIII period) and normal femoral head with 20 cases in each. Age 20-50, all case of illness all MRI check. Data quantitative calculation of each period of femoral head necrosis and normal cartilage of femoral head and trabecular bone T2 map value. All the selected necrosis and normal subjects were excluded on the basis of observation of disease osteoporosis and other effects.ResultsAlong with the progress of the disease, avascular necrosis of the femoral head ARCO stage is high, the more serious illness, cartilage T2 map value higher, cartilage damage and also more obvious, but between cartilage and bone trabeculae without significant correlation, the experiments show that trabecular bone necrosis also can cause damage to the femoral head cartilage degeneration. The LSD test analysis showed that between avascular necrosis of the femoral head ARCOIII period cartilage and normal femoral head, ARCOI, ARCOII period cartilage T2 map values had significant difference,Pvalues less than 0.05.The Third Section:Study on T2 map imaging of without bone marrow edema and bone marrow edema stage ARCOII necrosis of the femoral head cartilage and bone microstructureObjectiveOsteonecrosis of femoral head ARCOII period with bone marrow edema side group and avascular necrosis of the femoral head ARCOII period without bone marrow edema group, the cartilage and bone trabecula structural.MRI morphological changes and measurement of T2 map quantitative data, to study the effect of magnetic resonance T2 map imaging on the diagnosis value of osteonecrosis of the femoral.MethodsThe First Affiliated Hospital of Guangzhou University of Chinese Medicine three Department of orthopedics 40 cases of femoral head necrosis (ARCOII), 20 cases of bone marrow edema,20 cases of bone marrow edema, the range of femoral neck and intertrochanteric, all 40 subjects were not related to MR checking contraindications. Age 20-48, all of the subjects were in the femoral head as the research site. All case of illness all MRI check. Calculation of avascular necrosis of the femoral head ARCOII period with bone marrow edema side group and avascular necrosis of the femoral head ARCOII period without bone marrow edema group, the cartilage and bone trabecula structural MRI measurements of quantitative data. All the selected necrosis and normal subjects were excluded on the basis of observation of disease osteoporosis and other effects.ResultsNecrosis without bone marrow edema and necrosis of bone marrow edema between cartilage and bone micro structure on the morphological characteristics and quantitative index no significant difference. But from the table view, bone marrow edema group cartilage T2 map value was slightly higher than that of no bone marrow edema group.Conclusion1、Normal femoral articular cartilage T2 map numerical head can be roughly defined as 49.39+8.158, Clinical the interval possibility as reference standard, Necrosis of the femoral head cartilage T2 map if the measured value is greater than this value (more than 5-10 units), the suspect that the necrosis of the femoral head cartilage has been damaged, it is worthy of further attention;2、Early necrosis of the femoral head cartilage degeneration was not obvious, ARCOIII stage of femoral head necrosis of articular cartilage T2 the highest map value, the damaged degree of degeneration is the most significant, ARCOI、ARCOII stage of femoral head necrosis of articular cartilage damage may be not obvious or only mild damage;3、The appearance of bone marrow edema secondary to femoral head necrosis is a bad indicator of the progress of the disease, Through imaging observation, there was no obvious difference in the map T2 values between the bone marrow edema and the necrosis of the femoral head and the bone marrow edema and the necrosis of the femoral head bone, It can be inferred that the bone marrow edema of the femoral head may be caused by the pathological changes of the bone secondary to the cartilage, But because of the close relationship between cartilage and cartilage, At the same time, there were some slight signs of the map T2 values of cartilage in the bone marrow, This also suggests that the appearance of bone marrow edema may cause further damage to the articular cartilage of necrosis femoral head, The treatment of bone marrow edema may delay or even reverse the degeneration of the femoral head necrosis cartilage, this is also worthy of further research for clinicians.