Skip to main content
. Author manuscript; available in PMC: 2013 Jul 15.
Published in final edited form as: Annu Rev Biomed Eng. 2012 May 21;14:369–396. doi: 10.1146/annurev-bioeng-071811-150032

Figure 6.

Figure 6

Tagged magnetic resonance (MR) images provide the ability to track displacement of tissue in human volunteers. These images are obtained by modulating the longitudinal magnetization of spin packets. Transient sinusoidal patterns of longitudinal magnetization are produced noninvasively in tissue by the combination of radiofrequency pulses and magnetic field gradients; the remainder of the MR pulse sequence is a standard fast gradient-echo scheme. The resulting tagged image (c) is a product of the spin-density image (a) and the sinusoidal pattern (b).