An MRI arthrogram is a magnetic resonance image that uses a special dye to show up your shoulder joint’s structures more clearly. The dye, called a contrast agent, is injected into the area being investigated. It will help make the scan clearer and assist Mr. Cole in his assessment of your injury. It is particularly useful in diagnosing instability, labral damage and SLAP tears. It will also give clear views of the rotator cuff tendons.