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Operation
2
Tests with Uniformity and Linearity (UAL) Phantom
Figure 2-12 is an image of the signal bubble for quadrature error. If there were any quadrature phase
error, another ghost circle would be visible in the lower right-hand corner of the image. Quadrature error
has become less common in most of the recent MRI systems.
Figure 2-12
2-15
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