First implementation of fully sequential ART.  MLP paths and application of ART appear to be working properly but there is currently an issue with convergence.  It became apparent that at least part of the issue was an inappropriately large value for the relaxation parameter lambda and this is currently being tested to determine what an appropriate value is.  It is possible that there is an issue with either calculation of entry/exit points of the object hull, the MLP paths, or the ART calculations, but the assumption at the moment is that the issue is simply the relaxation parameter.  Since ART is currently fully sequential in all aspects, each iteration takes about 30 minutes, so testing is moving slowly, but image reconstruction will be performed for a larger number of iterations and for more data sets to help determine if there is an issue with the implementation or not.