Inclusion Criteria:  Inclusion criteria: Patients diagnosed with joint synovial disease through radiological examination, arthroscopy or pathological biopsy of the joint, or whose clinical manifestations meet the diagnostic criteria of the American College of Rheumatology (ACR) for joint synovial disease. The patient agreed to receive pre-treatment DCE-MRI, DWI and IVIM scans and imaging omics analysis, had performed or planned to undergo synovial pathological examination (including needle biopsy and postoperative specimen biopsy), agreed to follow-up after treatment, and was able to understand and Complete the postoperative test and sign the informed consent form.  Exclusion Criteria:  Exclusion criteria: those who cannot cooperate or refuse to undergo preoperative multimodal magnetic resonance examination; those who have contraindications to MRI scan; those who do not show synovial enhancement changes on MRI scan; the lesion is too small to delineate the area of interest; the pathological diagnosis result is not It belongs to joint synovial disease; patients who have received surgery, medication or other systemic treatment before standardized MRI scan; suffer from kidney disease that requires hemodialysis or peritoneal dialysis; serum creatinine and glomerular filtration rate indicate renal function Insufficiency; a history of tumors in other parts of the joint except for the examination; life-threatening diseases; a history of surgery on the damaged joints in the past 6 months; a history of intramedical injection of hyaluronic acid or steroids in the damaged joints 3 months before the examination, Those who cannot understand and complete the postoperative test correctly.