Parameter Optimization for Quantitative Signal-Concentration Mapping Using Spoiled Gradient Echo MRI

Table 2

Absolute average errors (±SD) for TR 40 ms and TR 100 ms as a function of flip angle FA. Absolute average errors vary systematically as a function of FA. For TR 40 ms, the optimal flip angle is 30°, with an absolute average percentage difference PD of 7.9%±3%. For a TR of 100 ms, the optimal flip angle is 60°, with an absolute average percentage difference PD of 10.2%±4.5%.

TR 40 ms			TR 100 ms
FA	PD%	PD SD	FA	PD%	PD SD
10°	17.6	4.2	10°	18.3	5.4
30°	7.9	3	30°	16.2	3.7
60°	20.5	7.5	60°	10.2	4.5
90°	42	10.5	90°	28.2	6.7