code: def get_g_vector(csa_dict):
      return get_vector(csa_dict, "DiffusionGradientDirection", 3)
  
file_path: nibabel/nibabel/nicom/csareader.py
imports: import numpy
  from .structreader import Unpacker
  from .utils import find_private_section
label_desc: Use image node_id 11 for calling a global function with example usage: get_g_vector(csa_dict) and returns: get_vector