Cross-Excitation, Cross-Talk, Slice Overlap - Video Lesson

Hey everybody, and welcome back to our course on MRI artifacts. In this lesson, we will discuss cross excitation, crosstalk, and slice overlap, which are slice interaction artifacts that can reduce image quality by disrupting normal signal recovery. We'll define each one, explain what causes them, and why they matter for diagnosis, then wrap up with practical ways to troubleshoot and prevent them. Let's get started. In MRI, image quality depends on precise control of how radio frequency, RF energy excites tissue. Ideally, each RF pulse excites only the intended slice. In real scanning conditions though, slice excitation is not perfectly confined and this can cause interactions between neighboring slices. This is where cross excitation and crosstalk come in and these concepts are particularly relevant in examinations that rely on subtle contrast differences, such as brain, spine, and musculoskeletal imaging. Let's discuss how cross excitation and