What factor contributes significantly to the occurrence of sampling artefacts?

The acquisition matrix size is a critical factor that contributes significantly to the occurrence of sampling artefacts in MRI. The acquisition matrix defines the resolution of the image; it indicates how many pixels are used to capture the data. A smaller acquisition matrix may lead to insufficient sampling of the signal, resulting in aliasing and other artefacts. These artefacts can obscure diagnostic information and affect image clarity.

In contrast, a larger acquisition matrix allows for greater detail and more accurate representation of the scanned volume, helping to minimize sampling issues. Therefore, optimal selection of the acquisition matrix size is essential for achieving high-quality images free from sampling artefacts.