What kind of artefact can arise when tissues with different susceptibilities are adjacent?

Susceptibility artefacts occur when adjacent tissues with varying magnetic susceptibilities are imaged together in an MRI scan. This interference can lead to distortions in the magnetic field, causing localized signal loss or misregistration of the images. These artefacts are particularly pronounced at interfaces between different types of tissues, such as fat and water, or at the site of metal implants where the magnetic properties differ significantly.

Understanding susceptibility artefacts is crucial because they can impact diagnostic accuracy, leading to misinterpretation of the images. Recognizing such artefacts allows radiologists and technicians to better differentiate between true pathology and imaging artifacts, ultimately enhancing the quality of MRI assessments.

The other options, though they sound plausible, do not accurately describe the specific artefacts associated with differing tissue susceptibilities. For instance, phase cancellation artefacts arise from variations in phase shifts, uniformity artefacts refer to inconsistencies in signal intensity across the imaging field, and heterogeneity artefacts are less commonly recognized terms in the context of MRI artefacts.