Which of the following methods can reduce magnetic susceptibility artefacts?

Reducing magnetic susceptibility artifacts is crucial for improving image quality in MRI, and utilizing shorter echo times (TE) is an effective strategy in achieving this. A shorter TE minimizes the time during which the spins experience inhomogeneities in the magnetic field caused by susceptibility differences between tissues. As these differences can lead to signal loss or distortion, reducing the TE can help diminish the impact of these artifacts, resulting in clearer and more precise images.

In contrast, other methods listed may not effectively address susceptibility artifacts or could even exacerbate them in certain contexts. For instance, while employing larger field of views (FOV) can provide a more comprehensive image, it doesn't directly mitigate the effects of magnetic susceptibility differences. Using gradient echo sequences may highlight these artifacts rather than reduce them due to their sensitivity to magnetic field inhomogeneities. Increasing the bandwidth can also help in reducing chemical shift artifacts but does not specifically target magnetic susceptibility artifacts as efficiently as reducing the echo time does. Thus, using shorter echo times is the most direct approach to minimizing these specific artifacts in MRI imaging.