SpatialResample Gives Error When Attempting Spline Interpolation

[ellisdg]

Describe the bug
When I put an integer (0-5) for the mode for SpatialResample to perform spline interpolation, I get an error. The error seems to involve the padding method being set to 'border' which I never specified. The error goes away if I switch the interpolation mode to "bilinear" or "nearest".

To Reproduce

from monai.data import MetaTensor
import torch
from monai.transforms import SpatialResample
image = MetaTensor(x=torch.rand((1, 100, 100, 100)), affine=torch.diag(torch.ones(4)))
SpatialResample(mode=3)(img=image, dst_affine=image.affine, spatial_size=image.shape)

  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 3460, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-8-203f9d215858>", line 1, in <module>
    SpatialResample(mode=3)(img=image, dst_affine=image.affine, spatial_size=image.shape)
  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/monai/utils/deprecate_utils.py", line 221, in _wrapper
    return func(*args, **kwargs)
  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/monai/transforms/spatial/array.py", line 306, in __call__
    img = affine_xform(img, mode=mode, padding_mode=padding_mode)
  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/monai/transforms/spatial/array.py", line 2290, in __call__
    out = self.resampler(img, grid=grid, mode=_mode, padding_mode=_padding_mode)
  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/monai/transforms/spatial/array.py", line 2134, in __call__
    [
  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/monai/transforms/spatial/array.py", line 2135, in <listcomp>
    _map_coord(c, grid_np, order=int(_interp_mode), mode=look_up_option(_padding_mode, NdimageMode))
  File "/Users/david.ellis/miniconda3/envs/unet/lib/python3.10/site-packages/monai/utils/module.py", line 133, in look_up_option
    raise ValueError(f"Unsupported option '{opt_str}', " + supported_msg)
ValueError: Unsupported option 'border', Available options are {'mirror', 'reflect', 'grid-constant', 'grid-wrap', 'grid-mirror', 'wrap', 'constant', 'nearest'}.

Expected behavior
Not raising an error when I specify spline interpolation.

[wyli]

Thanks for reporting, let's track this problem with #6222