Table 3. Summary of literature: validation of tractography.

Studies that have performed comparisons of dMRI tractography and anatomic tracing in non-human primates. We list the source of the tracer data (from a previously published database or from the same brain as the dMRI scan), type of comparison (E: endpoints; Q: qualitative; T: trajectory), and dMRI acquisition parameters for each study (“iso” indicates isotropic voxels). ^†: These b-values were collected in vivo; hence they are not directly comparable to the b-values of the other studies

	Tracing source	Type	dMRI
			b-values [s/mm2]	Gradient directions	Voxel size [mm]
Dauguet et al. (2007)	Same brain	T	750†	6	1.5 iso
Schmahmman et al. (2007)	Schmahmann and Pandya (2006)	Q	Max 40000	514	.3 x .3 x .4
Hagmann et al. (2008)	Stephan et al. (2001)	E	Max 40000	514	.5 iso
Gao et al. (2013)	Same brain	E	1200	31	.3 iso
Jbabdi et al. (2013)	Lehman et al. (2011)	Q	2000	60	.55 iso
			8000	120	.43 iso
Calabrese et al. (2014)	Schmahmann and Pandya (2006)	Q	1500-10000	12-257	.13-.6 iso
Thomas et al. (2014)	Schmahmann and Pandya (2006)	T	4800	121	.25 iso
van den Heuvel et al. (2015)	Stephan et al. (2001)	E	1000 †	60	1.1 iso
	Markov et al. 2014
Azadbakht et al. (2015)	Felleman and Van Essen (1991)	E	4000	61	.43 iso
			8000	120	.8 iso
Donahue et al. (2016)	Markov et al. (2014)	E	8000	120	.43 iso
			4000/7500	61/128	.5 iso
Schilling et al. (2019a,b)	Same brains	T	1000	32	.3 iso
Ambrosen et al. (2020)	Markov et al. 2014	E	1477/4102/8040	180/180/180	.5 iso
Girard et al. (2020)	Caminiti et al. (2017)	E
Safadi et al. (2018)	Same brains	Q	Max 40000	514	.7 iso
Tang et al. (2019)		Q
Grisot et al. (2021)		T
Maffei et al. (2021)		T