1. A system comprising: an imaging processing unit for processing digital data representing an image comprising a patient electro-physiological waveform, wherein the imaging processing unit is configured to: receive the image comprising a plurality of pixels; locate one or more regions of interest within the image; enhance the pixels in the one or more regions of interest to improve visibility of the pixels; and modify the image to include the enhanced pixels and non-enhanced pixels in the image; and a display to display the modified image comprising the patient electro-physiological waveform with the enhanced pixels.