When Kanzius was 22, after two years of trade school, he got a job at RCA as a technical assistant. On his first day, he fixed the company's color television transmitters, which had been the subject of lawsuits because they did not comply with Federal Communications Commission guidelines. He was promoted to the engineering department.
He worked at RCA for two years. In 1966, he took a job at a television station as director of engineering. Kanzius became president and co-owner of a television and radio station company in 1984. He retired in 2001.
In the winter of 2002 Kanzius felt soreness in his abdomen. On Good Friday, he went in for a CT scan. Doctors told him he had five to seven years to live.
The drive home felt like the longest of his life. On the way, he called Marianne. She noted that moment in her journal:
"I hadn't heard from him. Then the phone rang. 'Honey, it's bad. I have a tumor in my stomach. They're not certain, but they think it's non-Hodgkin's lymphoma.' The phone went silent."
He underwent chemotherapy, a few times a week for six months -- but he stayed upbeat, and doctors told him the cancer had gone into remission.
A year after his diagnosis, on Good Friday again, doctors gave him bad news: He had an aggressive type of cancer that had not actually gone into remission. They gave him nine months. Doctors said he needed a bone marrow transplant, and Kanzius traveled to M.D. Anderson Cancer Center in Houston for a second opinion. During his visit, he noticed the children in the cancer ward. Kanzius went home thinking about them, and soon mapped out his idea.
He knew that metal would heat when exposed to radio waves. He wanted to focus the waves by inserting metal particles into tumors. The infused cells would be placed in a radiofrequency field. The waves would pass through the human body, and the particles injected into the cancer would heat and kill the cells without harming anything else.
He built a machine to send the waves, while undergoing his second round of chemotherapy. This time the treatments nearly killed him. He spent three or four days a week at the hospital, sometimes for as long as eight hours. He came home to rest, only to toil over his project.
By Christmas 2003, Kanzius could barely walk. Around that time, his 83-year-old mother died from lung cancer. Kanzius was too weak to board a plane for her funeral.