How to run code by my datasets?

when I run the code by your requirems，I find it generate the dummy data，but I want to run the code by my datasets.

So,I have two problems:
1.What format should I process my dataset into?(my datasets format: .DCM)
2. Which folder should I put my dataset in?

could you please tell me how to do ?
Look forward to your reply.
Thank you very much!