I feel like I might be correct as, when I put my details into the linked MATLAB script from another post, I get the same results as my subtraction method. https://neurostars.org/t/heudiconv-no-extraction-of-slice-timing-data-based-on-philips-dicoms/2201/13?u=sam
However, I’d still love some feedback as I’m not confident and quite new to this all.