My old girl Ella had a shattered rear leg from being hit by a car. My options were amputation or surgery. I opted for surgery. She did have a plate inserted but that was because she had bone pieces removed and the plate was there to connect what was left of her leg bones. We had casts, lots of casts. The vet told me to keep her quiet, not let her roam around, absolutely no stairs, and to wear an e-collar if not well supervised. Ella did not listen to the vet. I blocked the stairs with a baby gate but she managed to jump it while wearing the cast which went all the way up her leg. She perforated her e-collars to where I could use them as colanders. I also had to find a high calorie food (not high protein but high calorie) because the veterinary surgeon said she would need twice the caloric intake in order to heal quickly. I ended up hand feeding her a mix of kibble and canned food. She healed fast and well. Ella ended up with a slightly shorter rear leg but she could still run like the wind. She lived 11 more years and died at age 14.5.
I have seen photos of the halo type device on one of the Facebook groups, "Basenji". You may have to join the group but here is the link to the post https://www.facebook.com/photo.php?fbid=1904813413071092&set=gm.1407068002664730&type=3&hc_location=ufi
I am sure you can contact the owner of this dog, Maria Eriksson, but please remember that English is not her native language as the "Basenji" group is international.