A novel weighted least squares PET image reconstruction method using adaptive variable index sets.

Hongqing Zhu Jian Zhou Huazhong Shu Limin Luo A novel weighted least squares PET image reconstruction method using adaptive variable index sets. 106-119 2006 16 Digital Signal Processing 2 http://dx.doi.org/10.1016/j.dsp.2005.04.011 db/journals/dsp/dsp16.html#ZhuZSL06