code: def setUp(self):
      self.input_img_np = np.expand_dims(
          TEST_INPUT, axis=0
      )  # mock image (numpy array)
      self.input_mask_np = np.expand_dims(
          TEST_MASK, axis=0
      )  # mock mask (numpy array)
  
      self.input_img_torch = torch.from_numpy(TEST_INPUT).unsqueeze(
          0
      )  # mock image (torch tensor)
      self.input_mask_torch = torch.from_numpy(TEST_MASK).unsqueeze(0)
  
file_path: MONAI/tests/test_ultrasound_confidence_map_transform.py
imports: from __future__ import annotations
  import unittest
  import numpy
  import torch
  from monai.transforms import UltrasoundConfidenceMapTransform
  from tests.utils import assert_allclose
label_desc: Use image node_id 1 for calling the TestUltrasoundConfidenceMapTransform obj's underlying member method code with example usage: obj.setUp() without return types