"Be nice to your gradients!" Useful gradient modifications for SPI
Ali Caglar zen 1 , Ute Ludwig 1 , and Michael Bock 1
Radiology - Medical Physics, University
Medical Center Freiburg, Freiburg, Germany
Single Point Imaging (SPI) is a pure phase encoding
sequence and it requires long scan times and it has high
level gradients which are active during RF excitation.
In this work, a novel k-space ordering scheme is
proposed which results in less heating of gradient
coils. Additionally, the sequence is modified such as
the gradient levels are limited during RF excitation
which provides a smoother excitation profile while
preserving the low acoustic noise levels. The idea of
limiting gradient amplitudes during RF excitation can be
applied to other projection reconstruction sequences.
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