Mechanism of Action. 1  Nivolumab is a human immunoglobulin G4 (IgG4) monoclonal antibody that binds to the PD-1 receptor and blocks its interaction with PD-L1 and PD-L2, releasing PD-1 pathway-mediated inhibition of the immune response, including the anti-tumor immune response.
This means it's unlikely you'll know the results of your scan immediately. The radiologist will send a report to the doctor who arranged the scan, who will discuss the results with you. It usually takes a week or two for the results of an MRI scan to come through, unless they're needed urgently.
An MRI usually takes 30 to 60 minutes but can take as long as 2 hours. How It Feels. You will not have pain from the magnetic field or radio waves used for the MRI. The table you lie on may feel hard, and the room may be cool. You may be tired or sore from lying in one position for a long time.