Key facts
- What it is: a joint injection performed with real-time image guidance (ultrasound, fluoroscopy, or CT) rather than by external landmarks alone.
- Why it matters: image guidance improves accuracy of needle placement, particularly for smaller, deeper, or more complex joints.
- What's injected: corticosteroid, hyaluronic acid, or PRP, depending on the joint and the condition being treated.
- Joints treated: knee, hip, shoulder, ankle, wrist, small hand and foot joints, and spinal facet joints.
An image-guided joint injection delivers medication directly into a joint space under real-time imaging, confirming accurate needle placement rather than relying on surface anatomy and feel alone. This applies to a wide range of joints and a range of injectable medications, each chosen based on the joint and the condition being treated.
Why image guidance matters
A conventional "blind" joint injection relies on the proceduralist's knowledge of surface anatomy to estimate needle position. For larger, more accessible joints like the knee, this can be reasonably accurate — but for smaller, deeper, or anatomically variable joints, accuracy drops meaningfully. Using ultrasound, fluoroscopy, or CT to guide the needle in real time confirms the medication is actually reaching the intended target, which matters both for how effective the injection is and for avoiding injection into surrounding structures.
What can be injected
- Corticosteroid — a potent anti-inflammatory, used for acute flares of joint or soft-tissue inflammation
- Hyaluronic acid — a joint lubricant used mainly for osteoarthritis, aiming to restore some of the joint's natural cushioning
- Platelet-rich plasma (PRP) — a concentrated preparation of the patient's own platelets, most established for mild-to-moderate knee osteoarthritis
Which option makes sense depends on the joint, the diagnosis, what's already been tried, and the patient's goals — assessed properly in consultation.
Joints commonly treated
Most peripheral joints can be injected under image guidance, including the knee, hip, shoulder, ankle, wrist, and the smaller joints of the hands and feet, as well as the facet joints of the spine. Some deeper or technically challenging joints — the hip in particular — are generally always approached under image guidance rather than blind, given the depth and proximity to important structures.
What to expect
Most joint injections are quick outpatient procedures, often completed within 15–20 minutes including setup. Local anaesthetic is commonly used at the skin entry point. Most patients experience only mild discomfort, similar to a standard injection, and can resume normal activity the same day, with some joints benefiting from a short period of relative rest afterward.
Common questions
Why have a joint injection under image guidance rather than a standard injection?
Studies comparing landmark-guided (blind) injections with image-guided injections have found image guidance improves needle placement accuracy, particularly for smaller or deeper joints, which can translate into more reliable symptom relief.
Which joints can be injected under image guidance?
Most peripheral and axial joints can be targeted, including the knee, hip, shoulder, ankle, wrist, small hand and foot joints, and the facet joints of the spine.
What medications are used in joint injections?
Common options include corticosteroid (for inflammation), hyaluronic acid (a joint lubricant, mainly for osteoarthritis), and platelet-rich plasma (PRP), depending on the joint and condition being treated.
Does an image-guided joint injection hurt?
Most patients experience only mild discomfort, similar to a standard injection. Local anaesthetic is often used at the skin entry point, and the whole procedure is typically brief.
Next step
Considering a joint injection?
Ask your GP about a referral, or get in touch directly to discuss suitability.
Get in touch