Moire Artifact - Video Lesson

Hey everybody. Welcome back to today's lesson on artifacts in MRI. In this lesson, we will define Moray artifact, describe what it looks like on MRI images, explain its two primary causes, multiple noise spikes and field inhomogeneity, and explore how it can affect image quality and diagnostic interpretation. You will also learn how to distinguish moire artifact from other artifacts and how to troubleshoot and prevent it in clinical practice. Understanding artifact is important because it can either mask true pathology or mimic abnormalities. Recognizing it quickly helps prevent repeat scans, improves workflow efficiency, and supports diagnostic accuracy. Let's get started. Moray artifact is an MRI artifact that appears as a repeating interference pattern across the image. It occurs when unwanted signal patterns interact with the true imaging signal creating a visible beat frequency effect. Moray artifact can have multiple different appearances but typically presents as broad