code: def to_3chan(x: Tensor, win1, win2, bins=None):
      return x.to_nchan([win1, win2], bins=bins)
  
imports: from __future__ import annotations
  from ..basics import *
  from ..vision.all import *
  from ..data.transforms import *
  import pydicom, kornia, skimage
  from pydicom.dataset import Dataset
  from pydicom.tag import BaseTag
  from pydicom.multival import MultiValue
  from PIL import Image
label_desc: Use image node_id 26 for calling a global function with example usage: to_3chan(x, win1, win2, bins) and returns: x