Preliminary results on noise reduction using stackgrams for (low-dose) X-ray CT sinograms. - Antti P. Happonen; Matti O. Koskinen (EUSIPCO, 2007)

Assessment of automated scintigram alignment in the stackgram domain for cardiac stress-rest SPECT studies. - Antti P. Happonen; Matti O. Koskinen (Comput. Medical Imaging Graph., 2007)

Experimental Investigation of Angular Stackgram Filtering for Noise Reduction of SPECT Projection Data: Study with Linear and Nonlinear Filters. - Antti P. Happonen; Matti O. Koskinen (Int. J. Biomed. Imaging, 2007)