Weighting - Video Lesson

Hey everybody. Welcome to today's lesson in MRI contrast. This lesson discusses the core principles of weighting in MRI, focusing on t one weighted, t two weighted, and proton density weighted images, including their applications in diagnosing various pathologies. Let's get started. Before we get to the definition of weighting, let's discuss extrinsic and intrinsic contrast parameters. Remember, extrinsic contrast parameters are ones we have control over, including repetition time, t r, and echo time, t e. Intrinsic contrast parameters are ones we have no control over because they are inherent to the tissue, like the relaxation times of fat and water or the proton density of various tissues. Weighting in MRI refers to the method of adjusting the extrinsic contrast parameters to enhance the contrast between