Values of the partition-DRA (PDRA) width (in number of pixels) in the conical numerical phantom, reconstructed at varying boundary angles (θ
) and number of secondary phase-encode steps (partitions) (N
). The PDRA width was determined through automatic detection of negative intensity deviation from the programmed myocardial value at the subendocardial layer. For the angles investigated, reconstructions with Np < 8 were not scored, as partial volume effects became sufficiently strong to obscure the myocardium (see Figure 1). Excluding these cases, the PDRA widths increased with both reduced Np (corresponding to coarser through-plane resolution) and increased θB.