CT-guided radiofrequency ablation (RFA) is effective in easing the symptoms of lung tumors that cannot be removed by surgery, and enhancement pattern and changes in the size of the tumor as shown on CT are the most important factors for determining whether that ablation has been successful, according to a pair of independent studies in the October 2004 issue of the American Journal of Roentgenology.
For the first study, researchers from Casertas S. Sebastiano Hospital in Italy analyzed 33 patients with malignant lung cancer who could not undergo surgery and opted for CT-guided RFA instead. No major complications occurred for any patient during RFA, and all RFA sessions were deemed successful at follow-up CT.
According to Giuseppe Belfiore, MD, lead author of the article, the study was prompted by the feeling that an alternative to the usual therapies for lung cancer was strongly needed. "We see too many lung cancer patients who, inoperable for a number of different reasons, are left with few chances to obtain an effective palliation," said Dr. Belfiore. "We believe that a powerful alternative/complementary option is now available, although we believe that the full potential of RFA is still to be assessed. For sure, RFA allows a better quality of life for many inoperable patients," Dr. Belfiore added.
Jason Ocker | EurekAlert!
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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