MRI Sequences and Parameters in Multiple Procedures
Introduction MRI sequences are the setting of pulse sequences that give a particular image appearance. The contrast differentiation is very necessary for MRI images to differentiate normal anatomy from pathology. There are many different MRI sequences that make effective contrast differentiation between the tissues, which includes- PD-Weighted Imaging It is used to differentiate anatomical structures based on their proton density. Proton density imaging is commonly used for brain imaging. The proton density (PD) weighted image is related to the number of protons (H nuclei) per volume. Therefore Tissues with the higher density of protons produce the strongest signals and appear brighter on the image. PD clearly distinguishes between gray and white matter, joint fluid, CSF muscle, etc. For PD images, Long TR/Short TE is used to minimize Ti and T2 effects. T1-Weighted Imaging - It is the basic pulse sequence. It demonstrates differences in the T1 relaxation ti...