Percutaneous radiology procedures often require the
repeated use of medical radiation in the form of computed tomography
(CT) scanning, to demonstrate the position of the needle in the under-
lying tissues. The angle of the insertion and the distance travelled by
the needle inside the patient play a major role in successful procedures,
and must be estimated by the practitioner and confirmed periodically
by the use of the scanner. Junior radiology trainees, who are already
highly trained professionals, currently learn this task “on-the-job” by
performing the procedures on real patients with varying levels of guid-
ance. Therefore, we present a novel Augmented Reality (AR)-based sys-
tem that provides multiple layers of intuitive and adaptive feedback to
assist junior radiologists in achieving competency in image-guided pro-
cedures.