A remedy for a Gibbs truncation artifact would be?

Increasing the number of phase encodings can help alleviate Gibbs truncation artifacts, which are characterized by ringing or oscillations around the edges of regions with steep changes in signal intensity, often seen on MRI images. This artifact is related to the limited sampling of frequencies in the k-space, which leads to the truncation of the data and results in those unwanted artifacts.

By increasing the number of phase encodings, you are effectively increasing the spatial resolution of the image, allowing for better representation of the signal variations in the tissue. This improvement in resolution helps to minimize the sharp transitions in signal that cause the Gibbs artifact, as the sampling becomes more detailed and captures more information about the image's true morphology.

In contrast, options that propose reducing phase encodings or manipulating the field of view may not address the underlying issue of k-space sampling that leads to this specific artifact. Additionally, decreasing the TE may have effects on image contrast but does not directly influence the Gibbs artifact. Thus, increasing the number of phase encodings is the most effective approach to mitigate Gibbs truncation artifacts in MRI imaging.