Sign in with your fingerprint DeltaBit Check-In is a next generation sign-in and queueing system developed for radiotherapy. Patients sign in to the daily treatment with their fingerprint, easily and safely. Thanks to the fingerprint, identity can be confirmed in a secure and easy way. And whatâ€™s best, there is no need to carry any identification document, such as an ID card. Over 3 000 000 treatments have been administered with it â€“ and each time to precisely the right patient!