The Use of Wavelet Filters to De-noise PET Data

The way that resolution was calculated involved plotting line pair/mm versus relative amplitude. Because the MTF is not linear, the data was mapped to an exponential. The x-value, or line pair/mm, that corresponded to 10% on the relative amplitude axis is considered to be the resolution. Figure 11: Ramp Filter. Figure 12: Shepp Filter ................
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