Optimal Tag Pattern Validation using Magnetic Resonance Imaging

Magnetic resonance (MR) tagging 1, 2] is a technique used to impose a known intensity pattern, called a tag pattern, on an object by spatially modulating the object's proton spin density before the image is acquired. Since the tag pattern moves with the object, MR tagging is particularly useful in the estimation of deformable motion from MR image sequences because some tag patterns can resolve motion ambiguities such as the aperture problem and improve the accuracy of optical ow motion estimates. In this paper we present an experimental validation of the tag pattern optimization method in 3, 4] in a practical MR imaging environment. This experiment includes a study of the eeects of temporal sampling on the optimal frequency that was not done in 3, 4]. Our experimental results show that the tag pattern optimization method in 3, 4] is valid in a practical MR imaging application.