During a conventional arthrogram, a special type of X-ray called fluoroscopy is used along with an iodine-containing contrast material that’s injected directly into the joint. This helps doctors see the bones and joints in “real-time” X-ray images, allowing them to pinpoint any issues accurately.
For a CT arthrogram, the same iodine-based contrast material is used, but instead of fluoroscopy, a CT scan is performed to capture images. This CT scan takes X-ray pictures from different angles to create detailed cross-sectional images (slices), giving physicians a closer look at the bones and joints.
In an MR arthrogram, an MRI scan is done after injecting a contrast material called Gadolinium into the joint. This material outlines the structures within the joint, similar to the other types of arthrograms. The advantage of an MRI is that it doesn’t expose you to radiation like X-rays do, making it a safe option for imaging.
Getting ready for an arthrogram is simple. Just wear loose and comfy clothes that make it easy to access the joint being checked. If your arthrogram is followed by an MRI, prepare like you would for an MRI by wearing clothes containing no metal such as zippers or belts.
An arthrogram is generally safe, but with any study, there are a few things to keep in mind:
• Allergic reactions to the contrast dye are rare, but it is important to let your physician and our technologist know if you had any reactions to iodine or gadolinium in the past.
• A small dose of radiation is used during the study, so if there is any chance you might be pregnant, please inform our technologist or your physician.
• If you have active arthritis or a joint infection, an arthrogram might not be suitable for you. It’s important to discuss your medical history with your physician beforehand to ensure the study is safe for you.