Its possible,but you would need to get your hands on a good digital forensics acquisition tool to capture an image of your phone memory.It would probably cost too much and require a bit more technical ability than an average user would have.Not a lot of tools support windows phone,but some do.I know of one,belkasoft .I dont know if a free trial is available or not,but I can tell you that I've done my degree in digital forensics,and these tools can be quite tricky to use.You need to know a fair bit on digital forensics processes,which typically require image acquisition of the memory and alalysis and recovery from the image.There are some great tools out there if you can find a free trial and a decent tutorial,you just might get your pictures back