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New Developments to Fight Breast Cancer
Reported July 30, 2009
(Ivanhoe Newswire) – Half of Americans are diagnosed with cancer at
some point in their lives. According to the National Cancer Institute,
192,370 women will be diagnosed with breast cancer in 2009, and more than
40,000 women will die from it this year alone. Medical physicists are
leading the fight against breast cancer with the development of new imaging
technologies and improvement on existing techniques.
Mammography, the most common method of detecting breast cancer, misses up to
20 percent of breast cancer present at the time of the screening,
particularly in women with dense breast tissue. Women with dense tissue are
recommended to undergo a very expensive technique -- magnetic resonance
imaging -- to detect cancer. The Mayo Clinic in Rochester, MN, has developed
a less expensive “molecular imaging” method to detect breast cancer in dense
tissue through radioactive tracers. A new study supported by the Susan G.
Komen Foundation will test whether the technique can be effective in small
doses; the study will begin to enroll 1,000 women in a few months.
Women use mammograms as a valuable tool to detect breast cancer, although
the X-rays pose a minor risk of damaging DNA and causing future secondary
malignancies. A technology using a sensitive device to detect single photons
may allow doctors to lower the X-ray dose women receive during a mammogram.
European clinical trials a couple years ago have shown this technique could
lower radiation doses by half while still effectively detecting cancers.
The new technique used to detect breast cancer is more comfortable than
mammograms, eliminating the pain and giving women fewer excuses to avoid
screenings. Based on computed technology (CT), the method has a woman lie
face down on a special table, with one breast suspended into a cone beam
breast CT scanner. Radiation doses are equivalent to a mammogram.
Researchers are currently testing the effectiveness of the technique.
SOURCE: 51st annual meeting of the American Association of Physicists in
Medicine, July 26 – 30, 2009, in Anaheim, CA |
