 When the echo is recorded close to the middle of the interval (TE ≈ TR/2, as is usually the case), the final term e−TE/T2 depends on T2, not T2*.Thus, bSSFP sequences behave more like spin echo than gradient echo sequences in that they do not have T2*-dependence.Also, since TR is nearly always much, much shorter than T1 or T2, the exponential terms containing TR can be disregarded.