Flow Phenomena - Video Lesson

Hey, everybody. Welcome to today's lesson on artifacts in MRI. This lesson focuses on flow phenomena and their impact on the MRI image. Flow phenomena are fundamental to understanding image formation in MRI, particularly when imaging blood vessels, cerebrospinal fluid, CSF, and other moving fluids. While flow can be intentionally used to generate contrast such as an MR angiography, it can also introduce artifacts that interfere with diagnosis. A solid understanding of why flow phenomena occur, how they appear, and how scanning techniques influence them is essential for producing high quality diagnostically reliable images. Let's get started. What are flow phenomena? Flow phenomena refer to predictable signal changes that occur when spins move into, out of, or within an imaging volume during data acquisition. Unlike random artifacts, flow phenomena are governed by the principles of magnetization, saturation, and timing within MRI sequences.