Effect ofr. pulses 1z cosp+IIxsinp [3-9] BI l1xcos阝-I1zsnβ [3-10] ly The effects of x and pulses can be determined by cyclic permutation of x, y, and z. All rotations obey the"right-hand rule",i.e, with the thumb of the right(!)hand pointing in the direction of the r.f. pulse, the curvature of the four other fingers indicate the direction of the rotation30 Effect of r.f. pulses bIy I1z ¾¾¾® I1zcosb + I1xsinb [3-9] bIy I1x ¾¾¾® I1xcosb - I1zsinb [3-10] bIy I1y ¾¾¾® I1y The effects of x and z pulses can be determined by cyclic permutation of x, y, and z. All rotations obey the "right-hand rule", i.e., with the thumb of the right (!) hand pointing in the direction of the r.f. pulse, the curvature of the four other fingers indicate the direction of the rotation