ce;'>options.precompute_lor = true</span><span> you also need to perform the precomputation phase if it hasn't been performed before. Note that if you want the measurement data to be precorrected, you need to do that manually. Corrections during reconstruction are applied automatically, though in some cases (such as randoms correction) you need to select the correction data when it is prompted.</span></div><div  class = 'S1'><span>For the reconstruction, implementations 1, 3 and 4 are supported with 3 recom