Approximate MRI Relaxation Times (Human Brain)
Values are approximate averages for healthy adults (37°C) from literature (e.g. Stanisz 2005,
Wansapura 1999, Rooney 2007).
Note: Tissues vary significantly by age, region, and pathology.
Field Strength
Tissue
PD (rel)
T1 (ms)
T2 (ms)
T2* (ms)
1.5TLoad to Sim
White Matter
~0.70 - 0.77
~600 - 800
~80
~60
Gray Matter
~0.80 - 0.85
~950 - 1100
~100
~60 - 80
CSF
~1.0
~4000
~2000
> 1000
3.0TLoad to Sim
White Matter
~0.70 - 0.77
~830 - 1100
~80 - 110
~45 - 55
Gray Matter
~0.80 - 0.85
~1300 - 1600
~80 - 110
~40 - 60
CSF
~1.0
~4000+
~2000
~300
7.0TLoad to Sim
White Matter
~0.70 - 0.77
~1200 - 1400
~55 - 60
~25 - 30
Gray Matter
~0.80 - 0.85
~1900 - 2100
~50 - 55
~25 - 35
CSF
~1.0
~4500
~1000 - 2000
~100