I dont think there is anyway that you could bring them over related to your F1. I might be wrong but the only way to go would be for them to apply for a tourist visa or if you can get a letter from a doc. about a health condition of yours due to which they have to be here... I dont think there is a way that they would get a visa just because you wanted them to visit you. They woiuld have to go through the normal tourist visa process. (As far as I know.)