CT Arthrogram

What is CT arthrogram?

An Arthrogram examines the inside of a joint (e.g. shoulder, knee, wrist, ankle) to assess an injury or a symptom you may be experiencing.

Facts about CT arthrogram:

Excellent delineation of articular cartilage for staging of OA. Although contrast resolution is better on MRI, CT provides better spatial resolution than MRI.

Co-administration of steroid and LA into joint, thereby being therapeutic as well.

Septic arthritis: As documented in literature, the risk is minimal, not any more so than spinal and other injections. We always use strict sterile techniques.

CT radiation: Our titrated dose CT scanner automatically adjusts radiation dose with body thickness detection, our friendly radiographers take particular consideration to using the lowest possible dose for achieving the best imaging quality; Radiation is therefore minimised.

There is extensive data on merits of diagnosing meniscal tears using CTA, the sensitivity and specificity is not significantly different to MRI, when reported by musculoskeletal trained radiologists.

CTA is preferred modality to MRI for post-op patients, as it has significantly less artifacts.



Please bring any previous films with you for comparison.

What happens?

You will change into a gown and be comfortably positioned so that the area being examined is most accessible. Scans are taken to locate its exact position. The skin in the area is sterilised with antiseptic, local anaesthetic given, then a needle is guided into the joint and after ensuring the needle is in the right place, the contrast medium will be injected into the joint. The injection may be accompanied by a feeling of fullness in the joint but should not be painful.

Following the injection, a scan of the joint will be performed.

How long does a CT arthrogram take?

About 15 to 30 minutes.

After Your Examination:

Most patients feel some mild to moderate increase in soreness in the joint for 24-48 hours following the injection. The joint will then return to feeling the way it was before the examination.

What are the risks of CT arthrogram?

Arthrography is a very safe procedure and complications are unusual. The most serious complication is an infection of the joint and is rare.

Occasionally people may be allergic to the contrast medium that is injected, and this most commonly results in a rash. More serious reactions appear to be very rare. Our staff members are, nonetheless, equipped and trained to treat contrast reactions.

Your images and report:

It is important that you make an appointment to return to your doctor after you have collected your examination result. Whether they are normal or abnormal, your doctor needs to correlate with other information for further management.

Your result will include a copy of the images from your study as well as a report from our radiologist.

Depending on your referrer’s preference(s), a copy of the report can also be sent to your referring doctor by fax or electronic download.

Digital copies of all studies are stored on our secured database for comparison with any future examinations.

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High Street, Penrith




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All Medicare Eligible ...

  • X-Ray
  • OPG
  • CT
  • Ultrasound
  • MRI
  • Mammography