Is DARTEL‐based voxel‐based morphometry affected by width of smoothing kernel and group size? A study using simulated atrophy

Our data confirmed DARTEL-based VBM generally benefits from smaller kernels and different kernels perform best for different group sizes with a tendency of smaller kernels for larger groups. Importantly, the kernel selection was also affected by the threshold applied. This highlighted that the choice of kernel in relation to group size should be considered with care.