TY - JOUR TI - String-averaging expectation-maximization for maximum likelihood estimation in emission tomography PY - 2014 AU - Helou, Elias Salomão AU - Censor, Yair AU - Chen, Tai-Been AU - Chern, I-Liang AU - Pierro, Álvaro Rodolfo De AU - Jiang, Ming AU - Shing Lu, Henry Horng T2 - Inverse Problems : An International Journal of Inverse Problems, Inverse Methods and Computerised Inversion of Data SN - 0266-5611 DO - 10.1088/0266-5611/30/5/055003 UR - https://doi.org/10.1088/0266-5611/30/5/055003 PP - Bristol, United Kingdom VL - 30 IS - 5 SP - 055003-1-055003-20 ER -