Table 1

Parameters and settings for numerical simulations

Parameters

Settings

Remarks


B0

3 Tesla

Main static magnetic field


Hct

0.4 (dimensionless ratio)

Blood hematocrit


Y

0.6 (dimensionless ratio)

Oxygenation level = [0,1]


χdo

0.27 × 4π ppm (SI metrics)

= χdexoy - χoxy


NAB

NAB(x, y, z) Gaussian ellipsoid

Neuroactive blob (Eq(1))


V(x, y, z)

Binary volume (radii = [2,10] μm)

Cortical vasculature (Eq(2))


FOV: D0 × D0 × D0

2 × 2 × 2 mm3

Cortical field of view


FOV support matrix

2048 × 2048 × 2048

Digital geometry (1 μm grid)


voxel: d0× d0× d0

32 × 32 × 32, 64 × 64 × 64, 128 × 128 × 128

Three voxel sizes (1 μm grid)


C[xn, yn, zn;TE]

64 × 64 × 64, 32 × 32 × 32, 16 × 16 × 16

Complex multivoxel image


A[xn, yn, zn;TE]

Assuming non-negative

MR magnitude image(Eq(9))


P[xn, yn, zn;TE]

Assuming positive/zero/negative

MR phase image (Eq(9))


corrA

In a range of [0, 1]

Magnitude mapping (Eq(10)


corrP

In a range of [0, 1]

Phase mapping (Eq(11))


TE

In a range of [0, 60] ms

Gradient echo time


Chen and Calhoun BMC Medical Imaging 2012 12:8   doi:10.1186/1471-2342-12-8

Open Data