the t1 , t2 , and spin-density values for gray and white matter were determined from these images and were found to be 914 msec , 114 msec , and 71 % for white matter other than the dorsal columns , and 946 msec , 87 msec , and 80 % for gray matter in human spinal cords .
C0228576
dorsal columns
C0037925
spinal cords