Hi everyone, I know is an old post but I think is a good idea keeping it updated for the people looking for a way to convert those files and print them.
In my case I have several mvl files and the only app I found which is able to open them with a really high quality was Baby sliceO from Tomovision. @Y_Martel you did an excellent app. It's intuitive and easy to use. I think I tried all the medical apps on earth until I found your one.
Unfortunately for me and my purposes it's quite expensive and there's no other option apart from Sonoview (To be honest I don't know if this app can export files in other formats or is just a simple Viewer).
I really appreciate if anyone knows more apps in order to open those medison files.