Abstract: A system architecture is disclosed that facilitates rapid execution of 3D registration or alignment algorithms. A first image module (e.g., RAM) is included to store data corresponding to images to be registered. A processor coupled to the first storage module accesses the data and determined mutual histogram (MH) values which are then used to compute mutual information (MI) between the images. The processor accumulates the MH values in a second image module. The second storage module is accessible so that registered images can be displayed. The architecture is scalable facilitating distributed calculations to speed-up the registration process.

Abstract: An arbitrary function generator produces one or more waveforms for arbitrary applications wherein a general-purpose waveform production capability is customized to meet the demands of specific applications. The arbitrary waveform generator supports arbitrary scaling of waveforms in amplitude and in time. The arbitrary function generator is a standalone system that may be integrated into a MRI control system. In a preferred embodiment of the present invention, a software system comprising a delivery component, a configuration component, a scaling component, and a triggering component provide the features and functions of the present invention. The various software components communicate in accordance with a shared memory database in which data structures comprising waveform descriptions and tuning parameters are made available to the various software components.