TABLE III:

The network architecture of the improved Zhang’s U-Net for sparsely-spaced landmarks

Layers applied	Slice Size	Number of feature maps
Input	256 × 256	1
5 × 5 Convolution	256 × 256	32
5 × 5 Convolution	256 × 256	32
Max-pooling	128 × 128	32
5 × 5 Convolution	128 × 128	64
5 × 5 Convolution	128 × 128	64
Max-pooling	64 × 64	64
5 × 5 Convolution	64 × 64	128
5 × 5 Deconvolution	64 × 64	64
Upsampling + Copy	128 × 128	128
5 × 5 Deconvolution	128 × 128	64
5 × 5 Deconvolution	128 × 128	32
Upsampling + Copy	256 × 256	64
5 × 5 Deconvolution	256 × 256	32
5 × 5 Deconvolution	256 × 256	32
5 × 5 Deconvolution	256 × 256	21
Softmax	256 × 256	21