When I entered medical physics in 1958 there were fewer than 100 in the U.S. and I could see many opportunities to apply my knowledge of nuclear physics.

The growth of technology is such that it is not possible today for a nuclear physicist to switch into medical physics without training. The field is now much more technical. More training is needed to do the job.

I have the satisfaction of knowing I did something useful for society.

Most medical physicists work in the physics of radiation oncology making sure that the desired dose is given to the cancer and the dose to normal tissues are minimized.

When I entered the field in July 1958 I believed what they told me about radiation risks. I spent much effort reducing the dose to patients in radiology.

Medical physicists work in cooperation with doctors. A few medical physicists devote their time to research and teaching. A few get involved with administrative duties.

Too many radiologists still believe there is a risk from a chest x-ray. Few radiologists can explain radiation to the patient in words the patient can understand.

I am now almost certain that we need more radiation for better health.

I was the Chair of the first department of medical physics in a medical school in the U.S.

There are now over 5,000 medical physicists in the U.S more than 50 times the number in 1958.

Many Nobel Prizes are awaiting good research to understand and explain the many mysteries of our bodies, such as the basic mechanism of memory or imagination.

In 1970 I realized that there was negligible risk from x-rays but many radiographs had poor image quality so that the risk from a false negative was significant.

I would not encourage everyone to take up this profession. Not everyone is suited for any particular field.

We developed simple test tools to optimize imaging parameters. No company was interested in our idea.

If someone is interested in medicine and also in physics and they like working with people and communicate well with others, I would strongly encourage them.

I have devoted much time and energy to helping medical physics in developing countries.

I am sure that I have been much more useful to society as a medical physicist.

In some cases radiation reduces the incidence of cancer.

I am not unhappy that my contribution was not recognized. I am sure it helped my career.

I don't display my plaques and honors. They are hidden behind a black curtain in my work room at home.

Nuclear physics is interesting but it is unlikely to help society.

Medical physics is an applied area of physics.

I found collaborating with congenial doctors about problems that physicists could help solve was very satisfying. I also like educating anybody who would listen!

It is likely that we need more radiation to improve our longevity.

My main frustration is the fear of cancer from low dose radiation, even by radiologists.

I started the nuclear medicine laboratory at UW Hospitals in 1959 and trained radiology residents in the field. It was 1965 before they found a trained MD (doctor) to take over my role.

When I entered medical physics in 1958 there were fewer than 100 in the U.S. and I could see many opportunities to apply my knowledge of nuclear physics.

If I had to come up with something that just came to me, I think growing up in a small town, I want knowledge. I still think today, knowledge is one of the keys.

My mom took me to see Carnal Knowledge and The Wild Bunch and all these kind of movies when I was a kid.

Education is a private matter between the person and the world of knowledge and experience, and has little to do with school or college.

Contention is inseparable from creating knowledge. It is not contention we should try to avoid, but discourses that attempt to suppress contention.

Harvard is first and foremost a university and not a consulting operation, and our job here is to teach and to research and to create knowledge on Asia in conjunction and in cooperation with scholars as well as with political, intellectual, and cultural leaders in Asia.

It was very interesting for me because DNA made music without much technical knowledge at all.

But, in the name of the experimental method and out of our poor knowledge, are we really entitled to claim that everything happens by chance, to the exclusion of all other possibilities?

The greatest gift is the passion for reading. It is cheap, it consoles, it distracts, it excites, it gives you knowledge of the world and experience of a wide kind. It is a moral illumination.

We must develop knowledge optimization initiatives to leverage our key learnings.

When a doctor does go wrong he is the first of criminals. He has nerve and he has knowledge.

There are in fact two things, science and opinion; the former begets knowledge, the later ignorance.

Knowledge is the treasure of a wise man.

We don't focus as much in schools on educational knowledge which requires thinking and application, as we do on acquiring facts.

The man of knowledge must be able not only to love his enemies but also to hate his friends.

The art and science of asking questions is the source of all knowledge.

The benefits of education and of useful knowledge, generally diffused through a community, are essential to the preservation of a free government.

Today knowledge has power. It controls access to opportunity and advancement.

Effective use of Braille is as important to the blind as independent mobility, knowledge in the use of adaptive technology, and the core belief that equality, opportunity and security are truly possible for all people who are blind.

I feel, sometimes, as the renaissance man must have felt in finding new riches at every point and in the certainty that unexplored areas of knowledge and experience await at every turn.

As far as knowledge goes I've come a long way.

For example, I spent a lot of time with Reagan, both before he ran for governor and when he was running for president. As a print reporter without the cameras, I was able to really test the quality of their minds and their knowledge base.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.