For T1-T2 data, using  and  to enumerate components in the longitudinal and transverse relaxation dimensions, respectively, the elements of the spectral matrix are as follows. The adjustable parameters are the component matrix amplitudes , A  , the flip angle factor f , and the relaxation rates 1 r  and 2, r  . Subscripts 1 and 2 refer to longitudinal and transverse relaxation periods, respectively. The sum of all elements in the zeroth row, excluding the offset, gives the sum of all the component transfer amplitudes. The sum of the elements of the matrix except the zeroth row and column gives the sum of all the component transfer intensities scaled by the flip angle factor f . The flip angle factor is an independent parameter because it can, for example, be found from the two sums. Analysis of T1-T2 data can therefore determine coefficients for all resolvable component transfer amplitudes.