Which method can help reduce cross-talk artefact?

Reducing cross-talk artefact is essential in MRI to improve image quality. The method of implementing inter-slice gaps between adjacent slices is effective in mitigating this issue. Cross-talk artefact occurs when signals from adjacent slices interfere with one another, leading to blurring and decreased image clarity. By introducing gaps between these slices, the likelihood of signal interference is significantly reduced.

The spacing allows for a buffer that minimizes the interactions of the magnetic signals from one slice with the next. This separation can help in achieving clearer images and reducing the unwanted artefact that arises from overlapping slice signals. Consequently, employing inter-slice gaps is a practical solution in MRI protocols to enhance visualization and diagnostic accuracy.

The other methods mentioned—using thicker slices, employing lower field strength, and utilizing longer TR times—do not directly address the cross-talk issue. Thicker slices may capture more signal but can exacerbate the cross-talk problem by including more adjacent tissue. Lower field strengths may produce noisier images, and longer TR times affect the imaging speed and may not specifically mitigate cross-talk artefact.