Convert the CD or Files to See the X-Ray Pictures

Hi.. so i recently had surgery on my knee and my doctor had some X rays done recently and i had asked him for a CD with the pictures because i wanted to have them. the technician gave me the CD but when i put it in my computer (i have a mac) all of the files are “.dll” and when i click on them it sends me to text edit and just shows me gibberish. 

I was wondering if you could help me convert the CD or the files so i can see the x ray pictures.

Thank you!!

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