How to combine 2 CustomVoxelPhantom?

[shenzhouxiaohao-cpu]

I can generate a rectangular phantom using the code below, but this rectangle has only a single T1 value. I want to create another rectangle with a different T1 value at a different location—how should I proceed?

phantom = mr0.CustomVoxelPhantom(
    pos=[[-0.0,0.0,0]],
    PD = [1.0],
    T1=[0.1],
    T2=[0.01],
    T2dash=[2e-3],
    D = [3],
    B0=0,
    voxel_size=0.2,voxel_shape='box'
)

I tried to set the T1 matrix of the phantom by following the example, but the obtained T1 matrix size is 1.

Additionally, what are the units for D and B0?

[J-Endres]

You can give multiple values per parameter, for example:

phantom = mr0.CustomVoxelPhantom(
    pos=[[0.0,0.0,0], [0.0, 1.0, 0.0]],
    PD = [1.0, 0.8],
    T1=[0.1, 0.2],
    ...
)

The units are:

• $B_0$: off-resonance in $Hz$
• $D$: apparent diffusion coefficient in $10^{-3} mm^2 / s$