Activation Detection on fMRI Time Series Using Hidden Markov Model
Figure 1
(a), (b), and (c) are t-test map for paradigm-defined state, SPM method, and 2-state HMM Viterbi path map respectively; (d), (e), and (f) are KLD map for paradigm defined state, SPM F-test, and 2-state HMM Viterbi path KLD map, respectively. The HMM Viterbi path methods (c) and (f) produce more compact and clearly highlighted regions than paradigm state estimation (a) and (d); HMM Viterbi path methods perform similarly to SPM with some minor differences.
