Comparison of MRI and arthroscopy on defect area measurement of knee joint cartilage / 实用放射学杂志

Objective To explore the consistency of knee articular cartilage defect area by magnetic resonance imaging (MRI)and arthroscopy.Methods Thirty-six patients (36 knees)with knee cartilage lesions were collected in our study.The defect area meas-urement of knee articular cartilage by MRI and arthroscopy was compared.Results A total of 92 lesions were detected by both MRI and arthroscopy with an average of 2.6 defects per knee.Preoperative MRI resultes demonstrated the mean defect area per knee was (1.9±1.5)cm2 ,while arthroscopic measurement after debridement indicated the mean defect area per knee was (2.9±2.6)cm2 , which had significant difference(P <0.001).The area measured by MRI was less than that by arthroscopy,and the mean difference was (1.7 ± 1.1)cm2 .The mean area measured by MRI was 70.1% of that by arthroscopy.Conclusion Arthroscopy and MR have good consistency in the number of articular cartilage defect lesions .MRI can reflect the knee articular cartilage defect area directly or indirectly,and be capable of accurate positioning and qualitative diagnosis.

Imaging Findings of Solitary Hepatic Biliary Hamartoma in Adult: A Report of 3 Cases / 实用放射学杂志

Objective To study imaging findings of solitary hepatic biliary hamartoma in adult in order to improve the understanding of this disease.Methods The imaging findings of solitary hepatic biliary hamartoma proved by surgery and pathology in 3 cases were retrospectively analyzed.There were one male and two female,the age was 28,43 and 76 years old respectively.B-ultrasound and CT were performed in three cases and MRI was done in one case.Results The masses ranged in diameter from 2 cm to 4 cm.The lesions were inhomogeneous slightly hypoecho or slightly hyperecho on B-ultrasound,slightly homogeneous or inhomogeneous hypodensity on plain CT scan,slight or medium homogeneous or inhomogeneous enhancement and delayed enhancement on contrast-enhanced CT scan,slight low signal intensity on T1WI and slight high signal intensity on T2WI,and rim enhancement on post-gadolinium images.Conclusion The findings of solitary hepatic biliary hamartoma in the adult are not of characteristics.It may be similar to common hepatic mass,such as metastasis,hepatic abscess and hepatic cavernous hemangioma.