Table 1:

Comparison among R2*, susceptibility measurements, and calculated hematocrit values in intracranial veins in 3 postmortem subjects

Venous Segment	Subject 1			Subject 2		Subject 3
	Susceptibility (ppm)	Hematocrit	R2* (1/s)	Susceptibility (ppm)	Hematocrit	Susceptibility (ppm)	Hematocrit	R2* (1/s)
Superior aspect of superior sagittal sinus	0.963	0.319	141	0.677	0.225	0.927	0.308	155
Inferior aspect of superior sagittal sinus	NA	NA	NA	0.782	0.259	0.985	0.327	164
Left transverse sinus	1.749	0.580	291	0.780	0.259	1.142	0.379	176
Right transverse sinus	1.135	0.377	277	1.045	0.347	0.785	0.260	161
Anterior aspect of straight sinus	0.661	0.219	94	0.643	0.213	0.681	0.226	104
Posterior aspect of straight sinus	0.972	0.322	182	0.841	0.279	0.939	0.312	177
Inferior sagittal sinus	0.523	0.174	90	0.307	0.102	0.447	0.148	76

Note:—NA indicates not available.