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Determination of the temperature-dependent electric conductivity of liver tissue ex vivo and in vivo: Importance for therapy planning for the radiofrequency ablation of liver tumours

Autor: Jörg-Peter Ritz, Urte Zurbuchen, Christoph Holmer, Andre Roggan, Heinz-J. Buhr, Thomas Dr. Stein, Kai S. Lehmann, C Seifarth

Publikováno v: International Journal of Hyperthermia. 26:26-33

Knowledge about the changes in the electric conductivity during the coagulation process of radiofrequency ablation of the liver is a prerequisite for the predictability of produceable thermonecrosis in the liver.Continuous measurements of the electri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4fac46e3b528fb447f0e2190ec70b1f
https://doi.org/10.3109/02656730903436442

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In-Vivo Evaluation of a Novel Bipolar Radiofrequency Device for Interstitial Thermotherapy of Liver Tumors During Normal and Interrupted Hepatic Perfusion

Autor: Christoph Reissfelder, Kai S. Lehmann, C. Isbert, Joerg-P. Ritz, Thomas Dr. Stein, Thomas Albrecht, Heinz J. Buhr

Publikováno v: Journal of Surgical Research. 133:176-184

Background Only monopolar systems have thus far been available for radiofrequency ablation of liver tumors, whose application is restricted because of the incalculable energy flow, reduction of electrical tissue conduction, and limited lesion size. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75bb73a55ec21b46e4bdcb34bbd51a5f
https://doi.org/10.1016/j.jss.2005.09.028

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InGaN on SiC LEDs for High Flux and High Current Applications

Autor: Volker Härle, Frank Kühn, Heribert Zull, Matthias Winter, Andreas Plössl, Johannes Baur, Michael Fehrer, Wilhelm Dr. Stein, Dominik Eisert, Berthold Hahn

Publikováno v: physica status solidi (a). 194:399-402

We investigate the influence of chip size, substrate shaping and mounting techniques on the light extraction efficiency of large area InGaN-LED chips grown on 6H-SiC substrates. New techniques to achieve good light extraction for large chip areas are

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ef64fa4c464e0311ca3d005c1c33189d
https://doi.org/10.1002/1521-396x(200212)194:2<399::aid-pssa399>3.0.co

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InGaAlP thin film LEDs with high luminous efficiency

Autor: Stefan Illek, Reiner Windisch, Rainer Butendeich, Klaus Streubel, Peter Stauss, Ralph Wirth, Wilhelm Dr. Stein, Walter Wegleiter, Heribert Zull, Paola Altieri

Publikováno v: SPIE Proceedings.

In Thinfilm LEDs, the substrate absorption of the generated light is avoided by a metal reflector between the light emitting layer and the substrate. The light extraction can be further enhanced by buried microreflectors or surface texturing. We demo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9f5d723f551a62c71471a598cd0e40c3
https://doi.org/10.1117/12.528938

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Recent progress of AlGaInP thin-film light-emitting diodes

Autor: Heribert Zull, Ralph Wirth, Andreas Ploessl, Christian Karnutsch, Klaus Streubel, Wilhelm Dr. Stein, Peter Stauss, Walter Wegleiter, Stefan Illek, Reiner Windisch, Ines Pietzonka

Publikováno v: SPIE Proceedings.

The concept of an AlGaInP thin-film light emitting diode includes a structure of semiconductor layers with low opticalabsorption on which a highly reflective mirror is applied. After bonding this wafer to a suitable carrier, the absorbingGaAs substra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2ff7b0c9cda9e636645c57298dffd3e
https://doi.org/10.1117/12.476582

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An Automated Analysis of Intracortical Porosity in Human Femoral Bone Across Age

Autor: Dr. Stein, M. S., Feik, S. A., Thomas, C. D. L., Clement, J. G., Wark, J. D.

Publikováno v: Journal of Bone & Mineral Research; April 1999, Vol. 14 Issue: 4 p624-632, 9p

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