Why is the patc_size of Task001-ACDC set to np. array ([16, 160, 160], embedding_im is 96？

[2vfbg]

I don't understand the design of parameters in the code, how to determine these parameters，according to acdc：
if task == 'Task001_ACDC':
plans['plans_per_stage'][Stage]['batch_size'] = 2
plans['plans_per_stage'][Stage]['patch_size'] = np.array([16, 160, 160])
self.embedding_dim = 96
self.depths = [2, 2, 2, 2]
self.num_heads = [3, 6, 12, 24]
self.embedding_patch_size = [1, 4, 4]
self.window_size = [[3, 5, 5], [3, 5, 5], [7, 10, 10], [3, 5, 5]]
self.down_stride = [[1, 4, 4], [1, 8, 8], [2, 16, 16], [4, 32, 32]]

[2vfbg]

Why is num_matches_per_ epoch 250？