What can be done to reduce chemical shift artefact in MRI?

Chemical shift artifact in MRI occurs when there is a misregistration of fat and water signals due to their slightly different resonance frequencies. To mitigate this effect, the use of a smaller field of view allows for improved spatial resolution and reduces the distance between the fat and water in the image. When combined with chemical fat saturation techniques, it effectively minimizes the differences in signal intensities between fat and water, thereby reducing the artifact.

In this context, employing chemical fat saturation helps to selectively suppress the fat signal, allowing the water signal to be more prominent and reducing the misalignment that leads to the artifact. This combination of a smaller field of view and fat saturation techniques works effectively together to enhance image quality and minimize distortion from chemical shift.

The other options, while they may have their benefits in MRI imaging, would not directly address the issue of chemical shift artifacts in the same manner or may even exacerbate the problem by not adequately separating fat and water signals within the imaging plane.