Truncation May Mimic Pathology
Truncation artefacts can obscure normal anatomy and be mistaken for pathology, for example a pseudo tear of the knee meniscus. It is particularly problematic in spinal imaging, in which they may generate a line down the centre of the cord which may be misinterpreted as a syrinx (fluid-filled cavity).
Further reading on this topic:
Books: MRI The Basics p181, Q&A in MRI p130