“This study was important because it reassures a patient with prostate cancer that the methods that are available at his local hospital may, in many cases, be as good as those that are currently only available in a limited number of centers,” said Anthony L. Zietman, M.D., a professor of radiation oncology at Harvard Medical School and a radiation oncologist at Massachusetts General Hospital.
According to the American Cancer Society, approximately 218,890 new cases of prostate cancer will be diagnosed in the United States in 2007. One in six men will get prostate cancer in his lifetime; however, only one in 35 men will die from the disease due in part to the wide variety of treatment options available. The Massachusetts General Hospital Department of Radiation Oncology and Harvard Medical School, both in Boston, jointly conducted the study to determine the comparative dosimetric benefits and drawbacks of IMRT versus 3D-CPT as treatments for patients with prostate cancer and to determine whether specific cases should be assigned to one treatment method over the other. The study sought to identify the sites in which proton therapy offers an advantage over IMRT; IMRT is a readily available form of treatment, but proton therapy is only available at five treatment centers in the United States.
Ten patients with clinically-localized early-stage prostate cancer were randomly selected for the study and treated with both IMRT and 3D-CPT. The percentage of bladder volumes receiving more than 70 Gy/CGE was reduced by an average of 34 percent when using IMRT versus 3D-CPT, but the rectal volumes were found to be equivalent.
The American Society for Therapeutic Radiology and Oncology, Inc. 8280 Willow Oaks Corporate Drive Suite 500 Fairfax VA 22031 phone 703-502-1550 fax 703-502-7852
Beth Bukata | EurekAlert!
Multi-year study finds 'hotspots' of ammonia over world's major agricultural areas
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The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
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Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
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Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
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In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
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