The company will further investigate the possible spread of contamination and its potential impact in the ocean, including the existence of beta radiation that could contain harmful strontium, company spokesman Yoshikazu Nagai said.

WSJ: New Leak at Japan Reactor Threatens Ocean

Dr. ANDREW EINSTEIN (Cardiologist, Columbia University): Using beta-blockers or other medications to lower patient's heart rate, which in many cases will chip the radiation dose down by minimizing the number of images which are taken, and matching the technical parameters such that the patient doesn't receive too many x-rays.

NPR: Study: Heart CT Scans May Pose Risk