How to Use encoder part as 'Original UNet:Ref(Convolutional Networks for Bio..2015)

[Choi-YeonHyo]

How to Use encoder part as 'Original UNet:Ref(U-Net: Convolutional Networks for Biomedical Image Segmentation..CVPR 2015)?
I use your nice architecture like resnet-UNet, VGG-UNet etc.. but i couldnt find original Unet Architecture. I want to know the performances such as 'Original UNet architecture' and 'other pretrained encoder-UNet' I modified the vgg.py in encoders folder, but couldnt get enough result ,because depth of VGG16 or 13 is deeper than Original Unet.
Please tell me how to modify the python file. thanks