Magnetic Particle Imaging (MPI) is a real-time imaging method providing high sensitivity and high resolution. A single-sided MPI scanner was presented by Sattel et al. in 2009. In addition to the general advantage of MPI, this scanner allows for an unrestricted patient access. A first single-sided experimental setup as well as an improved single-sided scanner have been realized. In this paper, the deviation between the measured and simulated magnetic field of the new constructed single-sided scanner will be investigated.