Arthrogram Typical arthrogram injection 5 cc iodinated contrast, 10 cc saline, 5 cc Ropivicaine, and 0.1cc Gad (for a 1:200 concentration) and then we infuse about 12cc into the shoulder. For this result, the injection contained 10 cc iodinated contrast. ? J Magn Reson Imaging. 2007 Jun;25(6):1219-25. Quantitative evaluation of the relaxivity effects of iodine on GD-DTPA enhanced MR arthrography. Ganguly et al.