GE Healthcare MRI SystemsTwinSpeed, Signa Infinity, Excite, Signa Infinity with Excite Technology, Signa Excite 3T, Signa Excite HD 1.5T, Signa Excite HD 3.0T, 1.5T Signa HDx, 3.0T Signa HDx, 1.5T Signa HDxt, 3.0T Signa HDxt, Signa HDi, & Signa Vibrant Systems