In a world first, University of Ottawa scientists have introduced a metal-free MRI dye capable of mapping kidney function with unprecedented accuracy. This technique will modernize urology, allow for ...

You are also right that the iodine-containing dye from CT scans can precipitate hyperthyroidism in a person who is destined to get it. However, the risk of this occurring is low. There is no increased ...

Dear Dr. Roach: My primary care doctor has ordered that I get an MRI scan with and without contrast dye. I have been having head pain every day in one single spot behind my right eye. My question is, ...

Dr. Keith Roach is a physician at Weill Cornell Medical College and New York Presbyterian Hospital. He writes an educational column on infectious diseases, public health and sports medicine. DEAR DR.

DEAR DR. ROACH: My primary care doctor has ordered that I get an MRI scan with and without contrast dye. I have been having head pain every day in one single spot behind my right eye. My question is, ...

Dr. Roach: My primary care doctor has ordered that I get an MRI scan with and without contrast dye. I have been having head pain every day in one single spot behind my right eye. My question is, is ...