Validation of Iodine-131-meta-iodobenzylguanidine cardiac scintigraphy in Parkinsonism: A preliminary study.

•123I-MIBG is not available in China and the price is 4 times that of 131I-MIBG.•131I-MIBG cardiac sympathetic image could be a useful tool in differential diagnosis of parkinsonism.•The image quality of 131I-MIBG scintigraphy is good and it's sufficient for diagnosis.•The diagnostic performance of 131I-MIBG scintigraphy is comparable to that of 123I-MIBG.