The Effect of Noise on the Accuracy of Strain Measurment When Using Strain Encoded (senc) Mri

a. Strain Range: In order to measure strain properly, the corresponding change in local spatial frequency of the tags has to be within the range between the lowand high-tuning frequencies. A good representation of the shifts in tag frequency due to local strain can be represented as shifts in the harmonic peak in the Kz direction, as shown in Fig 1. For that reason, the width of the harmonic peak in the frequency domain (B=1/SliceThickness), which depends on the slice thickness, must be considered. The maximum allowable strain range is bound by the maximum allowable shifts on both directions while taking into account that the peak should always lie between ωL and ωH (which is a basic assumption for the used center of gravity methodology [1]) and that ωL and ωH do not lie outside the slice profile. b. Tagging and Tuning Frequency: Given the targets minimum and maximum strain values max min ,ε ε and using Eq (2) and