There are a couple of ways of doing it.
The simplest is to mount the vhd in Disk Management, give it a drive letter obviously - it only takes a couple of seconds.
This tutorial shows how to mount the vhd - it is very easy System Image - Extract Files Using Disk Management
Then make an image of the mounted drive - you can see it in windows like any other drive and you can also make an image of it like any other drive.
LOL - no need to buy Acronis for that.
Just d/l the very small fast and efficient Macrium Reflect FREE Edition
Macrium will make an image at twice the speed of Windows system image app, and it will be almost half the size.
You can point it at any drive you like to restore the Macrium image.
Paragon has a fancy feature to mount the vhd inside the paragon app itself - you can partition, copy out individual files, make a paragon image of it, etc. That doesn't come in the free versions , though.