A month or so ago I had the need to create an image of a computer prior to wiping clean the disk to re-purpose the computer.
I was looking for an easy way to create an image copy on another computer which would enable me to browse the files on that image and access them individually.
After searching around I came across Macrium Reflect which enabled me to do just that and was free for personal use.
The process of creating the image and subsequently accessing files on it was easy and worked well.
If you are looking to do something similar I would suggest you take a look at this product.