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FIG 2. Comparison of T1 values from spin-echo and spoiled gradient-echo methods for phantom with spin-echo T1 values in the range of 400 to 1900 ms.
A, This figure shows the T1 estimate derived from the spoiled gradient-echo method (ordinate) for phantoms with different spin-echo T1 values (abscissa). The latter were used as the standard to evaluate the accuracy of the spoiled gradient-echo T1 values. Points are the mean T1 values of a region of interest from the respective phantoms, and error bars represent SD. Solid line represents the ideal situation when the spoiled gradient-echo values are equal to the spin-echo T1 values. Dashed line shows a nonlinear fit through the T1 values estimated with the spoiled gradient-echo method.
B, Comparison of the T1 distribution from a single section for a normal control participant using the spin-echo (solid line) and spoiled gradient-echo (dashed line) methods.
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