Siemens MULTI-ECHO EPI 4A21 - Manuals

Multi-Echo EPI Page 2 of 9 Numaris/4 VA21B Table of Contents 1 Basic principles ................................................................................................. 3 1.1 Principle of Multi-Echo EPI ........................................................................... 3 1.2 Image ...

Multi-Echo EPI Page 3 of 9 Numaris/4 VA21B 1 Basic principles 1.1 Principle of Multi-Echo EPI The basic timing scheme of Multi-Echo EPI is shown in Figure 1. It is based on the original EPI sequence proposed by Mansfield (1). After a single RF-excitation, n complete EPI images are acquired in a sing...

Multi-Echo EPI Page 4 of 9 Numaris/4 VA21B 1.2 Image contrast of Multi-Echo EPI The signal intensity of the single echo images of the Multi-Echo EPI sequence is simply given by: *) 2 / exp( 0 T TE S S − = where S0 is the signal intensity at echo time 0, which corresponds to the proton density for lo...