Tongpu Radiation Shielding PET radiopharmaceuticals. It's constructed with solid tungsten walls 2.25cm thick and yet weighsTM* only 15.6lbs.PET radiopharmaceuticals. It's constructed with solid tungsten walls 2.25cm thick and yet weighsTM* only 15.6lbs.PET radiopharmaceuticals. It's constructed with solid tungsten walls 2.25cm thick and yet weighsTM* only 15.6lbs.PET radiopharmaceuticals. It's constructed with solid tungsten walls 2.25cm thick and yet weighsTM* only 15.6lbs.PET radiopharmaceuticals. It's constructed with solid tungsten walls 2.25cm thick and yet weighsTM* only 15.6lbs.PET radiopharmaceuticals. It's constructed with solid tungste