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Träfflista för sökning "WFRF:(Seitz J) srt2:(2005-2009)"

Sökning: WFRF:(Seitz J) > (2005-2009)

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1.
  • Ahrens, J, et al. (författare)
  • Intermediate resonance excitation in the gamma p -> p pi(0)pi(0) reaction
  • 2005
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 624:3-4, s. 173-180
  • Tidskriftsartikel (refereegranskat)abstract
    • The helicity dependence of the total cross section for the (gamma) over right arrow(p) over right arrow -> p pi(0)pi(0) reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement, performed at the tagged photon beam facility of the MAMI accelerator in Mainz, used the large acceptance detector DAPHNE and a longitudinally polarized frozen-spin target. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, most likely due to the intermediate production of the D-13(1520) resonance. However, the contribution of the antiparallel spin configuration, arising from other reaction mechanisms, is also not negligible. This result gives important new information to resolve the existing model discrepancies in the identification of the nucleon resonances contributing to this channel.
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2.
  • Bastian, Patrick J., et al. (författare)
  • Insignificant Prostate Cancer and Active Surveillance: From Definition to Clinical Implications
  • 2009
  • Ingår i: European Urology. - : Elsevier BV. - 1873-7560 .- 0302-2838. ; 55:6, s. 1321-1332
  • Forskningsöversikt (refereegranskat)abstract
    • Context: Due to early detection strategies, prostate cancer is diagnosed early in its natural history. It remains unclear whether all patients diagnosed with prostate cancer warrant radical treatment or may benefit from delayed intervention following active surveillance. Objective: A systematic review of active surveillance protocols to investigate the inclusion criteria for active surveillance and the outcome of treatment. Evidence acquisition: Medline was searched using the following terms: prostate cancer, active surveillance and expectant management for dates up to October 2008. Further studies were chosen on the basis of manual searches of reference lists and review papers. Evidence synthesis: Numerous studies on active surveillance were identified. The recent inclusion criteria of the studies are rather similar. Keeping the short follow-up of all studies in mind, the majority of men stay on active surveillance, and the percentage of patients receiving active treatment is as high as 35% of all patients. Once a patients requires active treatment, most patients still present with curable prostate cancer. Furthermore, only few deaths due to prostate cancer have occurred. Conclusions: Active surveillance is an alternative option to immediate treatment of men with presumed insignificant prostate cancer. It seems that criteria used to identify men with low-risk prostate cancer are rather similar, and immediate treatment of men meeting these criteria may result in an unnecessary number of treatments in these highly selected patients. Data from randomised trials comparing active surveillance and active treatment will provide additional insight into outcome and follow-up strategies. (C) 2009 Published by Elsevier B.V. on behalf of European Association of Urology.
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4.
  • Seitz, Michael, et al. (författare)
  • Functional Magnetic Resonance Imaging in Prostate Cancer
  • 2009
  • Ingår i: European Urology. - : Elsevier BV. - 1873-7560 .- 0302-2838. ; 55:4, s. 801-814
  • Tidskriftsartikel (refereegranskat)abstract
    • Context: Magnetic resonance imaging (MRI) combined with magnetic resonance spectroscopy imaging (MRSI), dynamic contrast-enhanced MRI, and diffusion-weighted MRI emerged as promising tests in the diagnosis of prostate cancer, and they show encouraging results. Objective: This review emphasizes different functional MRI techniques in the diagnosis of prostate cancer and includes information about their clinical value and usefulness. Evidence acquisition: The authors searched the Medline, Embase, and Cochrane Library databases. There were no language restrictions. The last search was performed in October 2008. Evidence synthesis: The combination of conventional MRI with functional MRI techniques is more reliable for differentiating benign and malignant prostate tissues than any other diagnostic procedure. At present, no guideline is available that outlines which technique is best in a specific clinical situation. It also remains uncertain whether improved spatial resolution and signal-to-noise ratio of 3-T MRI will improve diagnostic performance. Conclusions: A limited number of small studies suggest that functional MRI may improve the diagnosis and staging of prostate cancer. This finding needs further confirmation in larger studies, and cost-effectiveness needs to be established. (C) 2009 European Association of Urology. Published by Elsevier B.V. All rights reserved.
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