The gamma tool was developed to quantitatively compare dose distributions, either measured or calculated. Before computing gamma, the dose and distance scales of the two distributions, referred to as evaluated and reference, are renormalized by dose and distance criteria, respectively. The renormalization allows the dose distribution comparison to be conducted simultaneously along dose and dist...

Fast data links require a low phase noise reference clock. An alternative is to reduce the noise of a low cost clock part using the band pass filtering inherent to the clocking architecture in the link. This study has a two-fold objective: to verify clock noise filtering in a 16 Gbps data link, and to prove the degree of filtering is adjustable. Two measured band pass filters are presented. Clo...

We modified the Adaptive Noise Cancellation procedure of Widrow et al. (11 for use as an adaptive band-pass filter to process Steady-State Evoked Potentials (SSEPs). The adative filter yields an approsimate 10 dB improvement in Signal to Noise Ratio over the Discrete Fourier Transform. Introduction Steady-state evoked potentials (SSEPs) are comprised of narrow-band signals buried in broad-band ...

A noise canceling technique based on a model-based recursive processor is presented. Beginning with a canceling scheme using a reference source, it is shown how to obtain an estimate of the noise, which can then be incorporated in a recursive noise canceler. Once this is done, recursive detection and estimation schemes are developed. The approach is to model the nonstationary noise as an autore...