1998•Japanese Journal of Radiological TechnologyOpen access

Influenece of the Susceptibility Effect on Fast Spin Echo MR Imaging : Comparison of Image Distortion in Fast Spin Echo and Conventional Spin Echo Sequences

Toshio Tsuchihashi, Toshio Maki, Isao Fujita, Takeshi Suzuki

Abstract

Image distortion caused by the susceptibility effect was compared using fast spin echo (FSE) and conventional spin echo (CSE) sequences. When the sampling bandwidth for FSE and CSE was equal, there was no diffference in image distortion. Furthermore, image distortion for the two methods remained the same when echo train length (FTL) and echo space (ES) were changed. Image distortion caused by the susceptibility effect was greatly influenced by the sampling bandwidth for both FSE and CSE imaging. This indicated that the strength of the frequency encoding gradient (readout gradient) at data collection had a considerable effect on image distortion.

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Key concepts: Distortion (music), Fast spin echo, Echo (communications protocol), Spin echo, k-space, Nuclear magnetic resonance, Sampling (signal processing), Physics