It has just recently been discovered that CT scans for children have been inappropriately used in two Ontario hospitals. As a result, some children have received excessive doses of radiation, putting them at greater risk of developing cancer later in life.

Staff at the two hospitals -- Peterborough Regional Health Centre is one -- reported that in close to 50 percent of selected cases, the appropriate equipment settings were not used.

Herein lies the problem -- developing organs are more susceptible to damage, and giving a small child an adult dose of radiation in a CT scan delivers the same amount of radiation as 4,000 traditional X-rays. Research shows that increased exposure to radiation over time can cause radiation-induced cancer.

CT scans are valuable diagnostic tools because they create 3-D images of organs, offering a better view of head injuries, chest trauma, cancer, and fractures. So they should not be disregarded -- but clearly, hospitals need to improve the management of all scanning procedures.

In Ontario, a diagnostic image safety committee has already been formed. The goal of this committee is to develop standards and do a better job of tracking radiation levels.

Experts are encouraging Ontario parents to refrain from worry unless their children have received many CT scans. And all parents are encouraged to speak up before their children receive CT scans. "Is my child receiving a pediatric protocol?" is all it takes.

Ontario's and Quebec's province-wide smoking ban in all public places went into effect on Wednesday -- to coincide with World No Tobacco Day. This is what Heather Crowe, a non-smoker who recently passed away from lung cancer, worked so passionately to make happen. As a waitress who worked in smoke-filled restaurants most of her adult life, she felt that second-hand smoke was the cause of her lung cancer. Crowe wanted to insure that no other person be subjected to second-hand smoke and suffer the same fate she did in being diagnosed with terminal lung cancer.

Many approve of the new law banning smoking in all public places, but not the bingo halls that raise money for charity. Ontario's 100 charity bingo halls state the smoking ban will result in the closing of 48 bingo halls over the next year. The Committee to Save Charity Bingo representing the bingo halls indicate that charities will lose $50 million dollars that would normally have been raised during bingo because 70 percent of customers who play at charity bingo halls smoke. They fear the players won't be coming around if they cannot smoke while they play bingo. While it is not in the nature of people to welcome change -- especially when it comes to lifestyle changes -- they do have the enormous capacity to adapt to new situations and circumstances, and in time, I think everyone will become comfortable with the new way. Or at least find alternative ways to make everyone comfortable.

Heather Crowe never smoked, but she was diagnosed with lung cancer. After 40 years of working as a waitress in smoked-filled restaurants, she became a lung cancer victim of second-hand cigarette smoke. Four years ago, she began a campaign of lobbying the Canadian government to pass a law banning smoking in all public places. In television ads for Health Canada, Crowe described herself as the face of cancer caused by second-hand smoke. Eventually, Crowe convinced the Ontario Government to pass the Smoke Free Ontario Act. On May 31st, all bars, restaurants and indoor public places must be 100 percent smoke-free. The act will ban any smoking in any enclosed public places and will add restrictions to the promotion, handling and display of cigarettes in stores. As a result of her efforts, Crowe is credited with accomplishing more in tobacco control to protect public health than any other one person. She had told people she wanted to live long enough to see the anti-smoking legislation go into effect.

Sadly, Crowe died one week before she could see that happen, but not before she accomplished what she set out to do, and her legacy to protect the health of the public from the harmful effects of second-hand smoke will live on for generations to come. Crowe was 61.