Practical Aspects of MRI (2023)-W8-CPH08-2023

Video Transcription

Video Summary

In a comprehensive talk on MRI imaging, the speaker discusses the significance of MRI's ability to produce images with a wide range of contrasts and delves into the basics of T1, T2, and T2 star-weighted imaging, as well as more specialized contrasts like magnetization-prepared sequences and diffusion. The presentation explains how image contrast is crucial for identifying lesions, where high contrast can sometimes compensate for low SNR. The reasons behind contrast variations are explored, focusing on the magnetization properties that affect these differences. The talk then details the various MRI relaxation properties—T1, T2, T2 star—and proton density, discussing how each influences imaging and how these principles are applied in different MRI sequences like spin echo and gradient echo scans. The utility of gadolinium contrast for enhancing image visibility is also covered. Further, specialized image contrasts such as inversion recovery sequences and diffusion-weighted imaging are explained. Overall, the talk offers insights into understanding and manipulating various imaging parameters to achieve desired contrasts and tackle different scanning challenges, emphasizing practical solutions to common MRI artifacts.

Keywords

MRI imaging

image contrast

T1-weighted

T2-weighted

diffusion-weighted

magnetization-prepared

gadolinium contrast

spin echo

gradient echo