Quantitative evaluation of the relaxivity effects of iodine on GD-DTPA enhanced MR arthrography.

Purpose: To quantify the effect of iodine on the gadolinium (Gd) contrast-enhanced signal in MR arthrography.

Materials And Methods: Saline solutions of Gd contrast agent (0-1 mmol/liter) were mixed with iodinated contrast agent (0-185 mmol/liter). The T1 and T2 relaxation constants of these solutions were measured at 1.