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.
Breast MRI overview. 1  An MRI machine produces a strong magnetic field and radio waves. 2  MRI does not use X-ray radiation. 3  Breast MRI is not better than mammography, just different.  Exams typically take 45 1  minutes. Breast MRI always involves contrastâan injection that makes the images more vivid and informative.