Arthrography using the contrast medium Hexabrix was performed in 120 patients. The knee arthrographies executed in double-contrast technique showed very good contrast, thanks to the chemical and physical properties of the contrast medium, in x-rays taken 1 to 3 minutes after injection of the contrast medium. Even if the x-ray films were taken 15 minutes after administration of the contrast medium, the results were still good. The contrast medium is well tolerated.