Object ID: 00000018WIA308A5970GYZ
Topic ID: id_40022902 Version: 1.3
Date: Mar 1, 2022 5:30:50 PM

Echo CSI PSD

The Echo CSI (MRS)PSD is a 90-180 pulse sequence that produces a spin echo, either from the entire sensitive volume of the coil or from a prescribed set of slices. From the scan parameter Details screen, choose between two Excitation Modes. For details, see Excitation Mode.

The Echo CSI (MRS) sequence is most suitable for performing proton CSI studies when no additional localization (such as that provided by STEAM CSI and PRESS CSI) is required.

Background

The timing diagrams for the volume and slice selective operating modes are shown below.

Figure 1. Echo CSI timing diagram to excite a volume

Figure 2. Echo CSI timing diagram to excite selective slices