Figure 2From: Technical tips to perform safe and effective Ultrasound Guided steroid joint injections in children Ultrasound guided steroid injection of the knee. a. Simulated injection in a mannequin showing the advancement of the needle using an “in-plane” approach with the ultrasound probe. b. Injection in a patient in which the non-ossified patella provides an excellent acoustic window for advancement of the needle (arrow) into the joint space.Back to article page