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Objective To investigate X‐ray ,CT and MRI features of synovial chondromatosis of the temporomandibular joint (TMJ) .Methods X‐ray ,CT and MRI features of eight patients of synovial chondromatosis of TMJ with histo‐pathologically con‐firmed were analyzed retrospectively .X‐ray examination and CT scanning were performed in all eight patients .Routine MRI scanning was performed in six patients and contrast‐enhanced MRI scanning was performed in two patients synchronously .Results Tumors occured unilaterally in all eight cases ,which occured on the right TMJ in six cases and on the left side in two cases .On X‐ray films , widen joint space and calcificated loose bodies occured in all eight cases .On CT scanning ,cystic‐solid mixed mass around the joint and calcificated loose bodies occured in all eight cases .On MR scanning ,multiple nodular long T1 and short T2 signal occured in six cases . Arthroedema and synovial hyperplasia with iso T1 and iso or slightly long T2 signal in six cases .On contrast‐enhanced MR ,homoge‐neous enhancement occurred in svnovial tissue and the edge of loose bodies in two cases .Conclusion The synovial chondromatosis of TMJ owns typical imaging features .The imaging findings can serve as a reference to improve diagnosis of synovial chondromatosis of TMJ .
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<p><b>OBJECTIVE</b>To establish a near-infrared qualitative analysis model to identify the authenticity of Polygonum multiflo- rum and distinguish processed products Polygoni Multiflori Radix.</p><p><b>METHOD</b>The NIR spectra were peformed on over 30 batches of P. multiflorum and Polygoni Multiflori Radix samples and the adulterants Cynanchum bungei, Pteroxygonum giraldii, Polygonum cillinerve to establish the qualitative discriminant model and the conformity test model of Polygonum multifiorum , and cluster analysis was used to analyze the samples from different origins.</p><p><b>RESULT</b>The model is able to identify correctly P. multiflorum with its counterfeit, and distinguish between P. multiflorum and Polygoni multiflori Radix.</p><p><b>CONCLUSION</b>Near-infrared spectroscopy can be applied in the identification of P. multiflorum, which could be used to screen Chinese herbal medicine preliminarily.</p>