What makes a dynamic MRI different from any MRI using contrast?

 Typically, a series of images are taken prior to contrast and then the MR imaging is stopped while contrast is injected. Once that is finished, the MRI proceeds with another series of images. With the dynamic protocol, the contrast is infused over a period of time while the MR imaging is taking place. In one study the gadolinium solution was injected via IV over a period of 180 seconds. In another study the gadolinium was dripped via IV between 2 and 3 minutes.