@article{FeuerriegelKlose1998, author = {Feuerriegel, Uwe and Klose, W.}, title = {Investigations into the Mechanism of the Deactivation of a Palladium-Supported Catalyst by Hydrogen Sulfide Poisoning. Klose, W. ; Feuerriegel, U.}, series = {Chemical engineering \& technology. 21 (1998), H. 7}, journal = {Chemical engineering \& technology. 21 (1998), H. 7}, isbn = {0930-7516}, pages = {562 -- 564}, year = {1998}, language = {en} } @article{WeckesserGriessmeierSchmidtetal.1998, author = {Weckesser, Martin and Grießmeier, Martin and Schmidt, Daniela and Sonnenberg, Frank and Ziemons, Karl and Kemna, Lars and Holschbach, Marcus and Langen, Karl-J. and M{\"u}ller-G{\"a}rtner, Hans-W.}, title = {Iodine-123 α-methyl tyrosine single-photon emission tomography of cerebral gliomas: standardised evaluation of tumour uptake and extent}, series = {European Journal of Nuclear Medicine}, volume = {25}, journal = {European Journal of Nuclear Medicine}, number = {2}, isbn = {1619-7089}, pages = {150 -- 156}, year = {1998}, abstract = {Single-photon emission tomography (SPET) with the amino acid analogue l-3-[123I]iodo-α-methyl tyrosine (IMT) is helpful in the diagnosis and monitoring of cerebral gliomas. Radiolabelled amino acids seem to reflect tumour infiltration more specifically than conventional methods like magnetic resonance imaging and computed tomography. Automatic tumour delineation based on maximal tumour uptake may cause an overestimation of mean tumour uptake and an underestimation of tumour extension in tumours with circumscribed peaks. The aim of this study was to develop a program for tumour delineation and calculation of mean tumour uptake which takes into account the mean background activity and is thus optimised to the problem of tumour definition in IMT SPET. Using the frequency distribution of pixel intensities of the tomograms a program was developed which automatically detects a reference brain region and draws an isocontour region around the tumour taking into account mean brain radioactivity. Tumour area and tumour/brain ratios were calculated. A three-compartment phantom was simulated to test the program. The program was applied to IMT SPET studies of 20 patients with cerebral gliomas and was compared to the results of manual analysis by three different investigators. Activity ratios and chamber extension of the phantom were correctly calculated by the automatic analysis. A method based on image maxima alone failed to determine chamber extension correctly. Manual region of interest analysis in patient studies resulted in a mean inter-observer standard deviation of 8.7\%±6.1\% (range 2.7\%-25.0\%). The mean value of the results of the manual analysis showed a significant correlation to the results of the automatic analysis (r = 0.91, P<0.0001 for the uptake ratio; r = 0.87, P<0.0001 for the tumour area). We conclude that the algorithm proposed simplifies the calculation of uptake ratios and may be used for observer-independent evaluation of IMT SPET studies. Three-dimensional tumour recognition and transfer to co-registered morphological images based on this program may be useful for the planning of surgical and radiation treatment.}, language = {en} } @article{HoylerBalodisProkofjevs1998, author = {Hoyler, Friedrich and Balodis, M. and Prokofjevs, P.}, title = {Level scheme of 194Ir / M. Balodis ; P. Prokofjevs ... F. Hoyler ...}, series = {Nuclear physics / A. 641 (1998), H. 2}, journal = {Nuclear physics / A. 641 (1998), H. 2}, isbn = {0375-9474}, pages = {133 -- 187}, year = {1998}, language = {en} } @article{EnningJenayehMuelleretal.1998, author = {Enning, Manfred and Jenayeh, I. and M{\"u}ller, C. and Kositza, N.}, title = {Mechatronics in automating shunting processes in marshalling yards / Jenayeh, I. ; M{\"u}ller, C.; Kositza, N. ; Enning, M. ; Rake, H.}, series = {Mechatronics '98 : proceedings of the 6th UK Mechatronics Forum International Conference, Sk{\"o}vde, Sweden, 9-11 September 1998}, journal = {Mechatronics '98 : proceedings of the 6th UK Mechatronics Forum International Conference, Sk{\"o}vde, Sweden, 9-11 September 1998}, publisher = {Pergamon}, address = {Amsterdam}, isbn = {0-08-043339-1}, pages = {xxi, 918 S. : graph. Darst.}, year = {1998}, language = {en} } @article{MuellerVeggianConteColauttietal.1998, author = {M{\"u}ller-Veggian, Mattea and Conte, V. and Colautti, P. and De Nardo, L.}, title = {Microdosimetric spectra down to 70 nm}, series = {Annual report / Istituto Nazionale di Fisica Nucleare, LNL, Laboratori Nazionali di Legnaro. 1997 (1998)}, journal = {Annual report / Istituto Nazionale di Fisica Nucleare, LNL, Laboratori Nazionali di Legnaro. 1997 (1998)}, pages = {67 -- 68}, year = {1998}, language = {en} } @article{KaemperAbrahamEhrfeldetal.1998, author = {K{\"a}mper, Klaus-Peter and Abraham, M. and Ehrfeld, W. and Hessel, V.}, title = {Microsystem technology: Between research and industrial application. Abraham, M.; Ehrfeld, W.; Hessel, V.; K{\"a}mper, K.-P.; Lacher, M.; Picard, A.}, series = {Microelectronic Engineering. 41-42 (1998)}, journal = {Microelectronic Engineering. 41-42 (1998)}, isbn = {0167-9317}, pages = {47 -- 52}, year = {1998}, language = {en} } @article{Mertens1998, author = {Mertens, Josef}, title = {Multi point design challenges for supersonic transports}, series = {Fluid dynamics research on supersonic aircraft : this report is a compilation of the edited proceedings of the special course on "Fluid dynamics research on supersonic aircraft" held at the Karman Institute for Fluid Dynamics (VKI) in Rhode-Saint-Genese, Belgium, 25-29 May 1998}, journal = {Fluid dynamics research on supersonic aircraft : this report is a compilation of the edited proceedings of the special course on "Fluid dynamics research on supersonic aircraft" held at the Karman Institute for Fluid Dynamics (VKI) in Rhode-Saint-Genese, Belgium, 25-29 May 1998}, publisher = {Research and Technology Organization}, address = {Neuilly-sur-Seine}, isbn = {92-837-1007-X}, pages = {8.1 -- 8.12}, year = {1998}, language = {en} } @article{BaumannSemenehDehairsetal.1998, author = {Baumann, Marcus and Semeneh, M. and Dehairs, F. and Elskens, M.}, title = {Nitrogen uptake regime and phytoplankton community structure in the Southern Ocean / Semeneh, M. ; Dehairs, F. ; Elskens, M. ; Baumann, M.E.M. ; Kopczynska, E.E. ; Lancelot, C. ; Goeyens, L.}, series = {Journal of Marine Systems. 17 (1998), H. 1-4}, journal = {Journal of Marine Systems. 17 (1998), H. 1-4}, isbn = {0924-7963}, pages = {159 -- 177}, year = {1998}, language = {en} } @inproceedings{SchwarteBuxbaumHeinoletal.1998, author = {Schwarte, Rudolf and Buxbaum, Bernd and Heinol, Horst-Guenther and Xu, Zhanping and Ringbeck, Thorsten and Zang, Zhigang}, title = {Novel 3D-vision systems based on layout optimized PMD-structures}, series = {Proceedings / OPTO 98, Internationaler Kongress und Fachausstellung f{\"u}r Optische Sensorik, Messtechnik und Elektronik, 18. - 20. Mai 1998, Kongreßzentrum Erfurt}, booktitle = {Proceedings / OPTO 98, Internationaler Kongress und Fachausstellung f{\"u}r Optische Sensorik, Messtechnik und Elektronik, 18. - 20. Mai 1998, Kongreßzentrum Erfurt}, publisher = {ACS Organisations GmbH}, address = {Wunsdorf}, pages = {197 -- 202}, year = {1998}, language = {en} } @article{SchoeningMalkocThustetal.1998, author = {Sch{\"o}ning, Michael Josef and Malkoc, {\"U}. and Thust, M. and Steffen, A. and Kordos, P. and L{\"u}th, H.}, title = {Novel electrochemical sensors with structured and porous semiconductor/insulator capacitors}, series = {Proceedings of the Seventh International Meeting on Chemical Sensors : 27 - 30 July, 1998, Beijing, P. R. China / ed. Zhi-Gang Zhou}, journal = {Proceedings of the Seventh International Meeting on Chemical Sensors : 27 - 30 July, 1998, Beijing, P. R. China / ed. Zhi-Gang Zhou}, publisher = {Elsevier}, address = {Amsterdam [u.a.]}, pages = {885 -- 887}, year = {1998}, language = {en} }