TY  - JOUR
A1  - Biselli, Manfred
A1  - Noll, T.
T1  - Dielectric spectroscopy in the cultivation of suspended and immobilized hybridoma cells / Noll, T.; Biselli, M.
JF  - Journal of Biotechnology. 63 (1998), H. 3
Y1  - 1998
SN  - 0168-1656
SP  - 187
EP  - 198
ER  - 
TY  - BOOK
A1  - Lauth, Jakob
A1  - Dingerdissen, Uwe
A1  - Henne, Andreas
T1  - Verfahren zur Herstellung von Aminen : Europäische Patentschrift EP0699653B1 ; EP-Patenterteilungsdatum: 07.01.1998 / Anmelder: BASF AG, 67063 Ludwigshafen. Erfinder: Uwe Dingerdissen ; Günter Lauth ; Andreas Henne ...
Y1  - 1998
N1  - Volltext über Datenbank: http://publikationen.dpma.de/
PB  - Europäisches Patentamt
CY  - [München u.a.]
ER  - 
TY  - JOUR
A1  - Scherer, Ulrich W.
A1  - Hör, G.
A1  - Hertel, A.
T1  - Positronen-Emissions-Tomographie des Herzens / G. Hör, A. Hertel, U. W. Scherer
JF  - Herzerkrankungen und Interventionsmöglichkeiten / F. Unger [Hrsg.]
Y1  - 1998
SN  - 3-540-62916-5
SP  - 236
EP  - 263
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Scherer, Ulrich W.
A1  - Hör, G.
A1  - Kranert, W. T.
A1  - Maul, F. D.
T1  - Gated Metabolic Positron Emission Tomography (GAPET) of Myocardium: 18F-FDG/PET to optimize Recognition of Myocardial Hibernation / G. Hör, W.T. Kranert, F.D. Maul, O. Schröder,  A. Karimian-Tatriz, O. Geb, R.P. Baum, U.W.  Scherer
JF  - Nuclear Medicine Communications. 19 (1998)
Y1  - 1998
SN  - 0143-3636
SP  - 535
EP  - 545
ER  - 
TY  - BOOK
A1  - Gartzen, Johannes
A1  - Heil, Günter
A1  - Mang, Thomas
T1  - Verfahren zur Aufbereitung eines Gemisches aus Zellulose und granuliertem Polymer / Patentschrift DE 4133699 C2
Y1  - 1998
N1  - DE 4133699 C2 ; Veröffentlichungstag der Patenterteilung 19.02.1998 ; Volltext recherchierbar über
PB  - Deutsches Patentamt
CY  - München
ER  - 
TY  - JOUR
A1  - Kleines, H.
A1  - Ziemons, Karl
A1  - Zwoll, K.
T1  - Experiences with ATM in a multivendor pilot system at Forschungszentrum Jülich
JF  - IEEE Transactions on Nuclear Science
N2  - The ATM technology for high speed serial transmission provides a new quality of communication by introducing novel features in a LAN environment, especially support of real time communication, of both LAN and WAN communication and of multimedia streams. In order to evaluate ATM for future DAQ systems and remote control systems as well as for a high speed picture archiving and communications system for medical images, Forschungszentrum Julich has build up a pilot system for the evaluation of ATM and standard low cost multimedia systems. It is a heterogeneous multivendor system containing a variety of switches and desktop solutions, employing different protocol options of ATM. The tests conducted in the pilot system revealed major difficulties regarding stability, interoperability and performance. The paper presents motivations, layout and results of the pilot system. Discussion of results concentrates on performance issues relevant for realistic applications, e.g., connection to a RAID system via NFS over ATM
Y1  - 1998
SN  - 0018-9499
VL  - 45
IS  - 4
SP  - 1867
EP  - 1871
ER  - 
TY  - JOUR
A1  - Weckesser, Martin
A1  - Grießmeier, Martin
A1  - Schmidt, Daniela
A1  - Sonnenberg, Frank
A1  - Ziemons, Karl
A1  - Kemna, Lars
A1  - Holschbach, Marcus
A1  - Langen, Karl-J.
A1  - Müller-Gärtner, Hans-W.
T1  - Iodine-123 α-methyl tyrosine single-photon emission tomography of cerebral gliomas: standardised evaluation of tumour uptake and extent
JF  - European Journal of Nuclear Medicine
N2  - 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.
Y1  - 1998
SN  - 1619-7089
VL  - 25
IS  - 2
SP  - 150
EP  - 156
ER  - 
TY  - CHAP
A1  - Dören, Horst-Peter
T1  - Aktuelle Fragen zur Schweißmetallurgie. Neue Werkstoffe und ihre schweißtechnische Verarbeitung = Current questions on welding metallurgy
T2  - Jahrbuch Schweißtechnik '99
Y1  - 1998
SN  - 3-87155-745-5
SP  - 77
EP  - 85
PB  - DVS-Verlag
CY  - Düsseldorf
ER  - 
TY  - JOUR
A1  - Hoffmann, C. P.
A1  - Lindemann, Markus
A1  - Zimmermann, Hans-Dieter
T1  - Logistik-Ressourcen im World Wide Web
JF  - Wirtschaftsinformatik. Vol. 40 (1998), iss. 3
Y1  - 1998
SN  - 0937-6429
SP  - 245
EP  - 250
ER  - 
TY  - CHAP
A1  - Lindemann, Markus
A1  - Runge, Alexander
T1  - Electronic contracting within the reference model for electronic markets
T2  - Proceedings of the Sixth European Conference on Information Systems, ECIS 1998, Aix-en-Provence, France, June 4-6, 1998 / Walter Baets (ed.)
Y1  - 1998
SN  - 849238333X
SP  - 44
EP  - 59
PB  - Euro-Arab Management School
ER  -