SUMMARY Objective: Image Characteristic of ligament and meniscus injuries of the kneee on 1.5Tesla magnetic resonance imaging at Duc Giang hospital. Methods: The cross-sectional retrospective study of 98 patients with diagnosed of knee injuries by magnetic resonance imaging (MRI) at Duc Giang Hospital from January 2018 to January 2020, aimed to comments on MRI appearance features in knee injury. The cross sectional study on the statistical basis of data to make comments on the MRI features in the diagnosis of knee injury, using Siemen Essenza 1.5 Tesla MRI with knee joint coil. Result: The most common age is from 20 to 40 years old. Male prominent. MRI can detect osseous edema with 35.7% in tibia and Femur is 23,5%, 94.9% anterior cruciate ligament (ACL) and 5.1% posterior cruciate ligament (PCL) injury. On the other hand, there were 45,9% medial meniscal and 25,5% lateral meniscal injury. We saw 2% tibial collateral ligament and 1% fibular collateral ligament. Conclusion: MRI imaging features play an important role in diagnosing and accessing the severity of knee injury. Keywords: ligament, meniscus, knee injury, MRI, ACL, PCL

SUMMARY Objective : The objective was to explore the efectiveness of fluoroscopic-guided hydrodilatation of glenohumeral joint for the treatment of frozen shoulder Materials and Methods: The prospective study 38 shoulders with primary adhesive capsulitis were treated with hydrodilatation between August 2017 and July 2020 in Radiology Centre- Bach Mai Hospital. The patient were hydrodilatation with corticosteroid injection performed via an anterior approach under fluoroscopy. Patients were followed up at baseline and at 2 and 4 weeks postintervention with Shoulder Pain and Disability Index (SPADI) scores, VAS scores, and ROM in abduction, forward flexion, external rotation. Results: A total of 38 consecutive patients with frozen shoulder underwent a distension arthrogram. There were 20 females and 18 males with a mean age of 59,6 (range : 43-91). The mean visual analogue pain score pre-distension was 6,1, two weeks and four weeks post-distension the mean score had significantly improved to 4,1 and 2,9. Mean baseline SPADI score for the patients pre-distension was 65, two weeks and four weeks post-distension the mean score had significantly improved to 45 and 32. Flexion improved from a mean of 76 degrees pre-distension with 106 degrees at 2 weeks and with 131 degrees at 4 weeks. Abduction improved from a mean of 75 degrees pre-distension with 107 degrees at 2 weeks and with 133 degrees at 4 weeks. External rotation improved from 20 degrees pre-distension with 36 degrees at 2 weeks and 53 degrees at 4 weeks. The patients receiving hydrodilatation demonstrated significant improvement in VAS scores and ROM in flexion, abduction, and external rotation at 8 weeks. No patient suffered any significant complication from hydrodilatation and, in particular, there were no intra-articular infections. Conclusion: Review of the literature and the results presented here indicate that arthrographic capsular distension progressing using fluid containing cortisone is a fairly effective treatment for adhesive capsulitis. Distension arthrography seems to he a promising treatment for adhesive capsulitis. Arthrographic shoulder capsule distension was performed through an anterior-lateral approach under fluoroscopic guidance is accurate, reliable and minimally invasive. Keyword: Hydrodilatation, adhesive capsulitis

SUMMARY Abtracts: Retrospective study of patients diagnosed with clinical disc herniation and magnetic resonance and had surgery at the Orthopedic and Spinal Trauma Department, Bach Mai Hospital. Results: 29.5% of patients in this study involved L5 - S1 disc herniation and 45.5% of patients with L4 - L5 disc herniation. Spinal Syndrome, Nerve Root Syndrome and Sensory Disorders are the most common symptoms. Nutritional disorders and sphincter disorders are found in posterior disc herniations and in the graft holes, in the L4-L5 and L5-S1 layers. Magnetic resonance is of high value in the diagnosis of lumbar spinal disc hernias and hernias, in diagnosing hernias, sensitivity from 97.9 %% - 100%, specificity from 98.1% - 100% accuracy from 98.2% - 100%; In the diagnosis of a specific herniation layer, the sensitivity ranges from 95.5% - 100%, the specificity is 90% - 100%, the accuracy is 94.2% - 100%. Conclusion: In our study, correlation in shown between clinical findings and MRI results. The most common clinical symptoms are spinal syndrome and nerve root syndrome. Disc herniation often protrusions, herniated backwards and in the L4-L5 layer. Magnetic resonance is of high value in diagnosing types and layer lumbar spinal disc hernias with accuracy from 94.2%-100%. Key words: Disc degeneration, Disc herniation, Magnetic resonance imaging

Study the magnetic resonance imaging characteristics in patients with hip joint repiacement indicattion SUMMARY Objectives: 1) Characterization of magnetic resonance images aseptic necrosis of the femoral head in patients with hip replacement appointed. 2) Characterization of magnetic resonance images of the contralateral hip in patients people on. Objects and methods of research: Retrospective study of 60 patients with aseptic necrosis of the femoral head surgery during 2014- 2015 at a hospital in Hanoi Medical University and Hospital Vietnam Germany. Results: The patients having hip replacement appointed two phase III and IV. All patients had femoral head collapse and are mostly seen when patients have hip osteoarthritis secondary (75% stage IV). Hypointense region was 73.3% stage III, stage IV, 93.3%, in line with a high prevalence of bone marrow showing the progression of the disease is> 85%. Rate aseptic necrosis of the femoral head in the contralateral hip joint meeting with the high rate of 80%, occur in all phases. Photos CHT at an early stage (I and II) are more common form hypointense band (77.4%), bone marrow lesions form T1-weighted images are shaped ring (61.3%), lesions of the subclass A (74.2%). Late stage (III and IV) characteristic image is under the cartilage fracture and femoral head collapse, besides that other image: hypointense on T1-weighted images region (70.5%), the image of subclass D (52.9%). Conclusions: MRI allows an accurate assessment stage lesions of clinical help for prognosis and hip replacement decision at the right time, at the same time to detect aseptic necrosis of the femoral head in the contralateral hip though no clinical symptoms, so that early treatment measures or prevent the more severe complications. Keywords: Aseptic necrosis of the femoral head.