Handbook of Biomedical Optics

342 Handbook of Biomedical Optics

order with higher terms representing higher order eects

(Aydin et al. 2002).

3. e local basis function method chooses a set of locally

supported basis functions on

T

S

n−1

. is allows essentially

the same machinery of sparse matrix manipulation as for

the spatial variables (Richling et al. 2001, Tarvainen et al.

2005b, 2006).

4. e wavelet basis chooses a hierarchical set of wavelets on

the sphere to allow for variable and adaptive angular dis-

cretization (Buchan et al. 2005).

e RTE has been utilized as the forward model for optical

tomography reconstruction in a few studies. In most of these

papers,