FIG 1.
The effect of the rectified noise floor on the diffusion weighted signal as a function of the signal-to-noise ratio. The data were generated in Matlab by adding normally distributed noise to both the real and imaginary signal having an original phase angle of zero. The “true signal” estimate of the diffusion attenuation curve was generated using an ADC of 1000 µm2/sec. The rectified noise floor is calculated by taking the root mean sum of squares of the noise added to the real and imaginary channels. Both the magnitude signal and the rectified noise floor represent the mean value of 105 iterations. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]