Attenuation correction (AC) in PET/MR imaging significantly alters the displayed PET signal. Modern AC methods forgo the process of directly calculating attenuation through transmission scans by using MR data to assign a tissue class and corresponding attenuation value to each voxel. However, MR AC often fails in the vicinity of medical implants, which create artifacts in the MR signal. Artifacts cause misclassification of tissue in the AC map, leading to miscalculation of PET signal. These issues are anticipated to affect PET/MR images of colorectal cancer patients with hepatic arterial infusion pumps (HAIPs). However, PET/MR imaging of these patients is desired for simultaneous visualization of liver soft tissue contrast and PET tracer uptake. This research investigated the effect of HAIPs on PET signal using various AC methods.