Comparative Study On The Diagnostic Value Of High-frequency Ultrasound,Contrast-enhanced Ultrasound And MRI In PVNS Of Knee

Objective This study explored the diagnostic value of high-frequency ultrasound and ultrasound contrast for PVNS of the knee by comparing the results of high-frequency ultrasound,ultrasound contrast and magnetic resonance examination.Method Retrospectively analyzed the clinical data of 30 patients with knee PVNS confirmed by surgical histopathological examination in our hospital from September 2018 to December 2019.All patients underwent knee high-frequency ultrasound,ultrasound contrast and magnetic resonance imaging before surgery Examination,comparative analysis of the preoperative high-frequency ultrasound,ultrasound contrast and magnetic resonance imaging performance of all patients in order to evaluate the diagnostic value of high-frequency ultrasound and ultrasound contrast for PVNS of the knee.Result(1)The detection rates of joint cavity fluid accumulation,synovial thickening,hemosiderin deposition,cartilage destruction and bone erosion in PVNS patients with knee joints were 86.67%(26/30)and 100%(30/30),83.33%(25/30),20.00%(6/30);the detection rate of basic lesions of PVNS patients with ultrasound contrast was 96.67%(29/30),100%(30/30),83.33 %(25/30),26.67%(8/30);the detection rates of the above basic lesions by magnetic resonance imaging are 90.00%(27/30),100%(30/30),86.67%(26/30),63.33%(19/30).The synovial thickness of the knee joint measured by high-frequency ultrasound examination was(13.46±2.68)mm,and the thickness of the synovial membrane after the imaging was(14.62±3.21)mm.The thickness of the synovial membrane was significantly thicker than before,and the signal strength of the synovial membrane was enhanced.Clearly show the blood flow signal in the synovium.(2)There is a statistically significant difference in the blood vessel grading results detected by the two ultrasound techniques(P<0.05).The results of ultrasound contrast examination show that the blood vessel grading is less than 0 to 1 grade and more than 2 to 3 grades.Ultrasound contrast can be detected Blood flow information that cannot be detected by high-frequency ultrasound.(3)The results of high-frequency ultrasound and contrast-enhanced MRI examination of patients with pigmented villonodular synovitis of the knee joint and MRI comparison analysis showed that: two examination methods of ultrasound and magnetic resonance imaging examination for the pigmented villonodular synovial membrane of the knee joint The detection rate of joint cavity effusion,synovial thickening,and hemosiderin deposits in inflammation-based lesions are basically the same;especially ultrasound contrast examination,the results are better;and the two ultrasound examination methods are used for cartilage and bone erosion The detection rate is significantly lower than magnetic resonance imaging.Conclusion High frequency ultrasound and ultrasound contrast examination and magnetic resonance imaging examination have basically the same detection rate for the basic lesions of knee PVNS,so high frequency ultrasound and ultrasound contrast examination have certain reference value for the diagnosis of knee PVNS,especially in magnetic resonance In various localities,township hospitals,and some special populations where the machine is not popular,high-frequency ultrasound and ultrasound contrast examination are worthy of vigorous promotion and development.