George Kontaxakis

Date of Birth:        July 5, 1967
Place of Birth:       Athens, Greece
Citizenship         Greek
Family status:       single
 


Working address:                                                                                             Home address:
German Cancer Research Center (DKFZ)                                                            Neugasse 19
Medical PET Group - Biological Imaging                                                              D-69117, Heidelberg
Im Neuenheimer Feld 280                                                                                  Germany
D-69120 Heidelberg, Germany                                                                            tel. +49 (0)6221 603634
tel: +49 (0)6221 422479
fax: +49 (0)6221 422510
e-mail: [email protected]  

 

Current Position:

11/96 - ...            Guest scientist fellow, German Cancer Research Center, Medical PET Group - Biological Imaging,
                          Heidelberg, Germany
 

Education:

1979 - 1985        Lycée Lèonin Highschool, Nea Smyrni, Greece. Highest honors

1985 - 1990        Diploma Degree, Electrical Engineering, July 1990, National Technical University of Athens
                         (NTUA), Greece

           1990       Erasmus Fellowship, University of Nancy, LIEN, France (03-06/1990)

           1990       Professional Engineer License, Technical Chamber of Greece (08/1990)

1990 - 1992        M.S. Degree, Biomedical Engineering, October 1992, Rutgers, The State University
                         of New Jersey, USA

1992 - 1996        Ph.D. Degree, Biomedical Engineering, January 1996, Rutgers, The State University
                         of New Jersey, USA

           1996        2nd IEEE-EMBS International Summer School on Medical Imaging, Brittany, France 
 

Previous Work Experience:

1987 - 1989        Assistant Engineer, Delta Techniki S.A., Athens, Greece (part-time)

1992 - 1995        Math Tutor, Educational Opportunity Fund Program, Douglass College, NJ, USA

1992 - 1995        Teaching Assistant, Rutgers University, in: "Computer Applications in Biomedical
                         Engineering", "Advanced Brain Research", "Neural Networks", "Introduction to
                         Biomedical Engineering"

           1995       Conference Chair Assistant, Publication and Registration Manager, 1995 IEEE
                         International Symposium on Industrial Electronics, held on July 10-14, 1995, Athens.

           1996       Postdoctoral Research Fellow, J. W. Goethe University Hospital, Nuclear Medicine Department,
                         Frankfurt, Germany
 

Honors and Awards:

- State Fellowships Foundation of Greece awards for outstanding students, 1985-1988

- Marion Johnson Fellowship, Rutgers University, Graduate School, 09/90-06/92 and 09-12/95

- Teaching Assistantship, Rutgers University, Biomedical Engineering Dept., 09/92-06/95

- Michael G. Mulinos Postgraduate Essay Award, The Hellenic Medical Society of New York, December 1995

- Association for the promotion of cancer diagnosis and treatment in Heidelberg (Verein zur
  Foerderung der Krebserkennung und Krebsbehandlung e.V. Heidelberg) Fellowship, November 1996.
 

Dissertations: 

- "Diffraction tomography using ultrasound waves'', [in greek], Diploma Thesis, 1990.
  Director: Prof. Nikolaos Uzunoglu.

- "A simulation study of the expectation-maximization algorithm for image reconstruction in positron emission tomography'',
  M.S. Thesis, 1992, 109 p., RLIN ID: G93-B16907.
  Director: Prof. George Tzanakos.

- "Maximum likelihood image reconstruction for positron emission tomography: Convergence characteristics and
  stopping rules'',
  Ph.D. Dissertation, 1996, 240 p., RLIN ID: G97-B4936. Also available by UMI.
  Director: Prof. George Tzanakos.
  Dissertation abstract published in Medical Physics, 24(8): 1335, August 1997
 

Languages:

- German (Mittelstufe Sprachdiplom, Goethe Institut (1989), living and work experience in Germany).

- French (Sorbonne I (1983), Sorbonne II (1984), living and work experience in France).

- English (1st Certificate, TOEFL, studies, living and work experience in USA).

- Spanish (conversational).

- Greek (mother tongue).
 

Associations:

- Research Associate, Biomedical Engineering Laboratory, National Technical University of Athens, Greece

- Visiting Research Associate, Division of Nuclear and Particle Physics, Physics Department, University of Athens, Greece

- Member of the Engineering in Medicine and Biology (EMB), the Nuclear and Plasma Sciences and the
  Medical Imaging Society of the Institute of Electrical and Electronic Engineers (IEEE)

- Member of the Technical Chamber of Greece and the Greek Society of Biomedical Engineering

- Associate member of Sigma Xi, The Scientific Society

- Former Member of the American Association of University Professors (AAUP)
 

Reviewer of scientific work:

- Reviewer for the IEEE Transactions on Nuclear Science, Editor: E.J. Hoffman, UCLA School of Medicine.
 

Grants - Funded Research Projects:

- D.A.A.D. Fellowship for language studies at the Goethe Institut, Schwäbisch Hall, Germany, summer 1989.
  D.A.A.D. is the German Academic Exchange Service.

- Grant-in-Aid of Research, Sigma Xi, The Scientific Society, January 1994 and
- Dr. Valergakis Graduate Research Grant, The Hellenic University Club of N. York, April 1994.
  Title: ''Design and performance evaluation of a high-resolution PET scanner using Monte Carlo techniques''.
  Amount: 2250 USD. Duration: 3 months (principal investigator).

- Student Fellowship Award, Education and Research Foundation of the Society of Nuclear Medicine, USA, June 1995.
  Title: ''The use of the ALOPEX algorithm for image reconstruction in PET ''.
  Amount: 3000 USD. Duration: 3 months (principal investigator).

- D.A.A.D. Fellowship for postdoctoral research in Frankfurt, Germany, January 1996.
  Title: ''Application of the EM algorithm for image reconstruction in PET'',
  in collaboration with the Department of Nuclear Medicine at the Medical Center of the University of Frankfurt am Main.
  Amount: 9600 DM. Duration: 6 months (principal investigator).

- Guest Scientist Fellowship, German Cancer Research Center (DKFZ), Medical PET Group, January 1997.
  Title: ''Reconstruction and quantification of PET images from multitracer studies".
  Amount: 72000 DM. Duration: 24 months (principal investigator).

- Bilateral collaboration project between Greece and Germany, sponsored by the General Secretariat of Research and
  Technology of Greece and the International Office of the Ministry of Education, Science, Research and Technology of
  Germany, June 1997.
  Title: ''Image reconstruction and quantification from multitracer studies with positron emission tomography'',
  in collaboration with the Biomedical Engineering Laboratory of the National Technical University of Athens, Greece.
  Amount: 40000 DM. Duration: 24 months.

- Exchange project with Spain - "Acciones Integradas Hispano-Alemanas", sponsored by the German Academic
  Exchange Service (D.A.A.D.), November 1997.
  Title: "Reconstruction and quantification of PET images in oncology",
  in collaboration with the Group of Bioengineering and Telemedicine of the Polytechnic University of Madrid, Spain.
  Duration: 12 months.

- Research Training Grant, Training and Mobility of Researchers (TMR) Programme, May 1996 (awarded but not accepted).
  Title: ''Design and evaluation of a novel attenuation correction method for PET using postinjection and single photon
  transmission measurements for quantitative brain and cardiac studies'',
  in collaboration with the Group of Bioengineering and Telemedicine of the Polytechnic University of Madrid, Spain.
  Amount: 105184 ECU. Duration: 24 months (principal investigator).
 

Invited Talks:

- Invited Lecturer, one-semester seminar course "Nuclear Tomography, SPECT-PET'', sponsored
  by the European Community Education Committee, University of Athens, Medical School, Greece, October 17-21, 1994

- Invited Speaker, 5th Mediterranean Meeting on Nuclear Medicine and Radiopharmaceuticals, Athens, Greece,
  May 23-28, 1995

- Invited Speaker, 7th Mediterranean Meeting on Nuclear Medicine and Radiopharmaceuticals, Athens, Greece,
  and Istanbul, Turkey, May 7-11, 1997

- Invited Speaker, 8th Mediterranean Meeting on Nuclear Medicine and Radiopharmaceuticals, Rome, Italy and 
  Istanbul, Turkey, May 19-24, 1998

- Invited Speaker, 1st Seminar on Interventional Nuclear Medicine in Clinical Praxis, Berlin, Germany, August 29, 1998

 

Conferences:
Authored paper presentations (oral or poster) at the following International Conferences:

- 13th IEEE-EMBS Annual International Conference, Orlando, FL, USA, November 1991

- 18th IEEE Northeast Bioengineering Conference, Kingston, RI, USA, March 1992

- 1992 IEEE Medical Imaging Conference, Orlando, FL, USA, October 1992

- 14th IEEE-EMBS Annual International Conference, Paris, France, November 1992

- 19th IEEE-EMBS Northeast Bioengineering Conference, Newark, NJ, USA, March 1993

- 15th IEEE-EMBS Annual International Conference, San Diego, CA, USA, October 1993

-  V International Symposium on Biomedical Engineering, University of Santiago de Compostela, Spain, September 1994

- 16th IEEE-EMBS Annual International Conference, Baltimore, MD, USA, November 1994

- 1994 IEEE Medical Imaging Conference, Norfolk, VA, USA, November 1994

- 1996 SPIE Medical Imaging Symposium, Newport Beach, CA, USA, February 1996

- 18th IEEE-EMBS Annual International Conference, Amsterdam, The Netherlands, November 1996

- 35th Annual International Meeting of the German Society of Nuclear Medicine, Kassel, Germany, April 1997

- 44th Annual Meeting of the Society of Nuclear Medicine, San Antonio, TX, USA, June 1997

- European Association of Nuclear Medicine Congress, Glaskow, Scotland, UK, August 1997

- 1997 ECAT Technical Users Meeting, Dresden, Germany, September 1997

- 35th Annual International Meeting of the German Society of Nuclear Medicine, Leipzig, Germany, April 1998

- 45th Annual Meeting of the Society of Nuclear Medicine, Toronto, Ontario, Canada, June 1998
 

Activities:

- Studies of classical guitar, National School of Music, Athens, Greece, 1980-1988.

- Member of the Hellenic Sailing School and the Mountaineering Team of Amfiklia, Greece.

- FCC-licensed operator, producer of the weekly "Voice of Greece'', WRSU 88.7, Rutgers University Radio, 1992-1996.
 

References:

Prof. Dr. med. Gustav Hoer
Director of the Nuclear Medicine Clinic, Medical School, Johann Wolfgang Goethe-University,
Theodor-Stern-Kai 7, Haus 21 D, 60950 Frankfurt am Main, Germany
Tel: +49-69-6301 6801, Fax:+49-69-6301 6805, e-mail: [email protected]

Djilali Kourtiche, PhD
Laboratory of Electronic Instrumentation of Nancy (LIEN), University Henri Poincaré, Faculty of
Sciences, BP 239, 54506 Vandoeuvre-Lès-Nancy, France
Tel: +33 3 8391 2071, Fax +33 3 8391 2391, e-mail: [email protected]

Dimitrios Koutsouris, PhD
Professor, Institute of Communications and Computer Systems, Department of Electrical and Computer
Engineering, National Technical University of Athens, Heroon Polytechneiou 9, 117 73, Athens, Greece
Tel: +30-1-772 3926, Fax: +30-1-772 2431, e-mail: [email protected]

George Limouris, MD
Associate Professor in Nuclear Medicine, University of Athens, Medical School, Vas. Sophias 76, 11528 Athens, Greece
Tel: +30-1-6403456, Fax: +30-1-6424456

Evangelia Micheli-Tzanakou, PhD
Professor and Chairperson, Biomedical Engineering Department, Rutgers University, 617 Bowser Road,
Piscataway 08854, NJ, USA
Tel: +1-732-445 2037, Fax: +1-732-445 3753, e-mail: [email protected]

Thomas V. Papathomas, PhD
Associate Professor, Psychology Department and Biomedical Engineering Department, Rutgers University,
617 Bowser Road, Piscataway, NJ 08854, USA
Tel: +1 732-445 6533, Fax: +1 732-445 6715, e-mail: [email protected]

Prof. Dr. rer. nat. Ulrich Scherer
FH Aachen, Abt. Juelich, Ginsterweg 1, D-52428 Juelich, Germany
Tel: +49-2461-99 31 24, Fax: +49-2461-99 31 99, e-mail: [email protected]

Prof. Dr. med. Ludwig G. Strauss
Coordinator of the Medical PET Group - Biological Imaging, German Cancer Research Center (DKFZ),
Department of Oncological Diagnostics and Therapy, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
Tel. +49-6221-422500, Fax: +49-6221-422476, e-mail: [email protected]

George Tzanakos, PhD
Associate Professor, Division of Nuclear and Particle Physics, Physics Department, University of Athens, Greece
and Visiting Professor, Biomedical Engineering Department, Rutgers University, 617 Bowser Road, Piscataway,
NJ 08854, USA
Tel: +30-1-728 4938, Fax: +30-1-723 5089, e-mail: [email protected]

Nikolaos Uzunoglu, PhD
Professor, Director of the Division of Electroscience and of the Institute of Communications and Computer Systems,
Department of Electrical and Computer Engineering, National Technical University of Athens, Heroon Polytechniou 9,
15773 Athens, Greece
Tel: +30-1-772 3556, Fax: +30-1-772 3557, e-mail: [email protected]

Yehuda Vardi, PhD
Professor, Statistics Center, Rutgers University, 110 Frelinghuysen Road, Piscataway, NJ 08854, USA
Tel: +1-732-445 4314, Fax: +1-732-445 2691, e-mail: [email protected]
 

Publications:
Articles in journals / contributions to books:

  1. M. Nadi, D. Kourtiche, C. Marchal, A. Hedjiedj, G. Kontaxakis, G. Rouane and G. Prieur, "Ultrasound thermography: Theoretical aspects and feasibility'', Ultrasonics, 30(2): 131-134, 1992.
  2. G. Kontaxakis, "Positron emission tomography: The imaging of body chemistry and functional anatomy'', in: Radionuclides for Receptors - Current Status and Future Aspects, G.S. Limouris, S.K. Shukla and H.-J. Biersack (editors), MEDITERRA Publishers, Athens, Greece, pp. 19-37, 1995.
  3. G. Kontaxakis, "Quantitative in vivo neuroreceptor imaging with positron emission tomography'', in: Radionuclides for Receptors - Current Status and Future Aspects, G.S. Limouris, S.K. Shukla, H.-J. Biersack (editors), MEDITERRA Publishers, Athens, Greece, pp. 45-63, 1995.
  4. G. Kontaxakis and G. Tzanakos, "A stopping criterion for the iterative EM-MLE image reconstruction for PET'', SPIE, vol. 2710: 133-144, Medical Imaging 1996: Image Processing, M. H. Loew, K. M. Hanson, Eds., February 1996.
  5. G. Kontaxakis and A. Dimitrakopoulou-Strauss, "New approaches for position emission tomography (PET) in breast carcinoma", in: Radionuclides for Mammary Gland - Current Status and Future Aspects, G.S. Limouris, S.K. Shukla, H.-J. Biersack (editors), MEDITERRA Publishers, Athens, Greece, pp 21-36, 1997.
  6. G. Kontaxakis and L.G. Strauss, "Maximum likelihood algorithms for image reconstruction in positron emission tomography", in: Radionuclides for Oncology - Current Status and Future Aspects, G.S. Limouris, S.K. Shukla, H.-J. Biersack (editors), MEDITERRA Publishers, Athens, Greece, (in press).
  7. G. Kontaxakis, L.G. Strauss and G. Tzanakos, "An efficient implementation of the iterative MLEM image reconstruction algorithm for PET on a Pentium PC platform", Journal of Computing and Information Technology, Vol. 6, No. 1 (to appear).
  8. A. Dimitrakopoulou-Strauss, L.G. Strauss, F. Gutzler, G. Kontaxakis, F. Oberdorfer, G. Irngartinger and G. van Kaick, "Pharmacokinetic imaging of C-11 ethanol with spectral analysis and positron emission tomography in patients with hepatocellular carcinoma and percutaneous ethanol injection", Journal of Nuclear Medicine (in review).
  9. G. Kontaxakis and L.G. Strauss, "Efficient iterative image reconstruction for emission tomography on distributed Pentium systems and a Web-based interface", (in preparation)
  10. P. Mantaka, A. Dimitrakopoulou-Strauss, L.G. Strauss, F. Oberdorfer, G. Kontaxakis, F. Gutzler, C. Herfarth and G. van Kaick, "Evaluation of the FDG metabolism in patients with primary and metastatic liver neoplasms", (in preparation).
  11. D.K. Kim, L.G. Strauss, A. Dimitrakopoulou-Strauss, F. Gutzler, G. Irngartinger, G. Kontaxakis, F. Oberdorfer and G. van Kaick, "The sequential FDG-PET studies of percutaneous ethanol injection treated hepatoma patients", (in preparation)
Published contributions to academic conferences:
  1. D. Kourtiche, M. Nadi, G. Kontaxakis, C. Marchal and G. Prieur, "Temperature measurements using ultrasound tomography: Theoretical aspects'', Proceedings of the 13th IEEE-EMBS Annual International Conference, Orlando, FL, USA, 1:325-326, November 1991.
  2. G. Kontaxakis and G. Tzanakos, "Study of certain characteristics of the EM algorithm for image reconstruction in PET'', Proceedings of the 18th IEEE Northeast Bioengineering Conference, Kingston, RI, USA, pp. 89-90, March 1992.
  3. G. Kontaxakis and G. Tzanakos, "A simulation study of the convergence properties of the EM algorithm for image reconstruction in PET'', Proceedings of the 14th IEEE-EMBS Annual International Conference, Paris, France, 5:1829-1830, November 1992.
  4. G. Kontaxakis and G. Tzanakos, "Study of the convergence properties of the EM algorithm - A new stopping rule'', Conference Record of the 1992 IEEE Nuclear Science Symposium and Medical Imaging Conference, Orlando, FL, USA, 2:1163-1165, November 1992.
  5. G. Kontaxakis and G. Tzanakos, "Further study of a stopping rule for the EM algorithm'', Proceedings of the 19th IEEE Northeast Bioengineering Conference, Newark, NJ, USA, pp. 52-53, March 1993.
  6. G. Tzanakos and G. Kontaxakis, "A stopping rule for the EM algorithm for image reconstruction in PET'', Proceedings of the 15th IEEE-EMBS Annual International Conference, San Diego, CA, USA, 1: 150-151, October 1993.
  7. G. Tzanakos and G. Kontaxakis, "Convergence behavior of the updating coefficients in the EM algorithm for PET'', Proceedings of the V International Symposium on Biomedical Engineering, pp. 133-134, Santiago de Compostela, Spain, September 1994.
  8. G. Kontaxakis and G. Tzanakos, "Study of the convergence properties of the updating coefficients in the EM algorithm for PET'', Proceedings of the 16th IEEE-EMBS Annual International Conference, Baltimore, MD, USA, 1: 628-629, October 1994.
  9. G. Tzanakos and G. Kontaxakis, "Statistical behavior of the updating coefficients in the EM algorithm for PET'', Conference Record of the 1994 IEEE Nuclear Science Symposium and Medical Imaging Conference, Norfolk, VA, USA, 3: 1310-1314, October 1994.
  10. G. Kontaxakis and G. Tzanakos, ''Practical application of a new stopping criterion for the EM-MLE image reconstruction for PET'', Proceedings of the 18th IEEE-EMBS Annual International Conference (in CD-ROM), Amsterdam, The Netherlands, November 1996.
  11. G. Kontaxakis, G. Tzanakos, G. Hoer, L.G. Strauss, A. Dimitrakopoulou-Strauss, U.W. Scherer, G. van Kaick, ''[Practical implementation of the ML-EM algorithm for image reconstruction with a new robust stopping criterion]'', (abstract, in German), Nuklearmedizin, 36: A72, April 1997.
  12. P. Mantaka, A. Eil, W. Tilgen, A. Dimitrakopoulou-Strauss, G. Kontaxakis, F. Oberdorfer, G. van Kaick and L.G. Strauss, ''[PET studies for the assessment of the perfusion and the FDG metabolism in metastases of malignant melanomas]'', (abstract, in German), Nuklearmedizin, 36: A69, April 1997.
  13. D. Chmielewski, P. Mantaka, A. Runz, G. Kontaxakis, G. Irngartinger, A. Dimitrakopoulou-Strauss, G. van Kaick and L.G. Strauss, ''[Practical issues in performing multiple-tracer PET studies]'', (abstract, in German), Nuklearmedizin, 36: A108, April 1997.
  14. G. Kontaxakis, G. Tzanakos, L.G. Strauss, A. Dimitrakopoulou-Strauss, P. Mantaka and G. van Kaick, ''Study of the local convergence behavior of the iterative ML-EM image reconstruction algorithms for PET'', (abstract), Journal of Nuclear Medicine, 38(5): 202P, May 1997.
  15. P. Mantaka, A. Dimitrakopoulou-Strauss, F. Gutzler, G. Kontaxakis, P. Schlag, F. Oberdorfer, G. van Kaick and L.G. Strauss, ''Evaluation of PET-FGD for the detection and differential diagnosis of liver lesions'', (abstract), Journal of Nuclear Medicine, 38(5): 137P, May 1997.
  16. P. Mantaka, A. Dimitrakopoulou-Strauss, L.G. Strauss, H. Goldschmidt, F. Oberdorfer, G. Irngartinger, G. Kontaxakis and G. van Kaick, ''PET studies of the FDG metabolism and the tissue perfusion in recurrent malignant lymphomas for tumor staging'', (abstract), Journal of Nuclear Medicine, 38(5): 153P-154P, May 1997.
  17. G. Kontaxakis, L.G. Strauss and G. van Kaick, ''Efficient implementation of an iterative image reconstruction (IIR) algorithm for quantitative PET studies on a conventional low-cost Pentium platform", (abstract), European Journal of Nuclear Medicine, 24(8): 1052, August 1997.
  18. A. Dimitrakopoulou-Strauss, L.G. Strauss, P. Schlag, P. Hohenberger, F. Oberdorfer, G. Kontaxakis and G. van Kaick, ''PET studies with O-15-water and F-18-fluorouracil (F-18-FU): comparison of systemic and regional administration in liver metastases", (abstract), European Journal of Nuclear Medicine, 24(8): 861, August 1997.
  19. A. Dimitrakopoulou-Strauss, L.G. Strauss, F. Gutzler, F. Oberdorfer, G. Irngartinger, G. Kontaxakis and G. van Kaick, ''Positron emission tomography (PET) with C-11-ethanol and F-18-deoxyglucose (FDG) in hepatocellular carcinomas (HCC) for therapy management", (abstract), European Journal of Nuclear Medicine, 24(8): 923, August 1997.
  20. A. Dimitrakopoulou-Strauss, L.G. Strauss, W. Tilgen, F. Oberdorfer, P. Mantaka, G. Kontaxakis and G. van Kaick, ''PET with F-18-dihydroxyphenylalanin (F-18-DOPA) in patients with malignant melanomas", (abstract), European Journal of Nuclear Medicine, 24(8): 1026, August 1997.
  21. A. Dimitrakopoulou-Strauss, L.G. Strauss, H. Goldschmidt, F. Oberdorfer, J. Kriesten, G. Kontaxakis an G. van Kaick, ''PET with C-11-aminoisobutyric acid (AIB) for diagnosis and therapy management of oncological patients", (abstract), European Journal of Nuclear Medicine, 24(8): 1034, August 1997.
  22. G. Kontaxakis, L.G. Strauss and G. van Kaick, "Efficient implementation of the ML-EM and OS-EM image reconstruction algorithms for the ECAT EXACT HR+ on a Pentium PC platform", ECAT Technical Users Meeting, Dresden, Germany, Sept. 1997.
  23. G. Kontaxakis, L.G. Strauss and G. van Kaick, ''[Efficient implementation of iterative image reconstruction methods for PET on PC-Windows-NT basis and a Web interface"], (abstract, in German), Nuklearmedizin, 37: A75, March 1998.
  24. P. Mantaka, A. Dimitrakopoulou-Strauss, F. Gutzler, C. Herfarth, F. Oberdorfer, G. Kontaxakis, G. Hör and L.G. Strauss, ''[PET-FDG studies to patients with primary and metastatic liver lesions]'', (abstract, in German), Nuklearmedizin, 37: A80, March 1998.
  25. G. Kontaxakis, L.G. Strauss and G. van Kaick, ''Optimized implementation and performance evaluation of iterative image reconstruction (IIR) algorithms for PET on distributed Pentium systems and a Web-based interface'', (abstract), Journal of Nuclear Medicine, May 1998 (in press)  - accepted for oral presentation at the Young Investigators Award session, 45th Annual Meeting of the Society of Nuclear Medicine, Toronto, Canada, June 1998.
  26. G. Kontaxakis, L.G. Strauss, G. van Kaick, G. Sakas and S. Pavlopoulos, "Ordered-Subsets acceleration of the ISRA, WLS and SAGE image reconstruction algorithms for emission tomography", submitted to Joint Congress of the European Association of Nuclear Medicine and the World Federation of Nuclear Medicine and Biology, Berlin, Germany, Aug. 30 - Sept. 4, 1998.
  27. G. Kontaxakis, L.G. Strauss and S. Pavlopoulos, "Advanced processing of multitracer dynamic oncological studies with PET on distributed Pentium systems", submitted to Joint Congress of the European Association of Nuclear Medicine and the World Federation of Nuclear Medicine and Biology, Berlin, Germany, Aug. 30 - Sept. 4, 1998.
  28. L.G. Strauss, G. Kontaxakis, A. Dimitrakopoulou-Strauss, S. Pavlopoulos and A. Santos Lleo, "Parametric imaging of dynamic PET studies, based on compartmental and non-compartmental approaches", submitted to Joint Congress of the European Association of Nuclear Medicine and the World Federation of Nuclear Medicine and Biology, Berlin, Germany, Aug. 30 - Sept. 4, 1998.
  29. A. Dimitrakopoulou-Strauss, L.G. Strauss, F. Gutzler, D.K. Kim, G. Irngartinger, G. Kontaxakis and G. van Kaick, "Positron emission tomography with C-11-ethanol and F-18-deoxyglucose in patients with hepatocellular carcinomas receiving percutaneous ethanol injection", submitted to Joint Congress of the European Association of Nuclear Medicine and the World Federation of Nuclear Medicine and Biology, Berlin, Aug. 30 - Sept. 4, 1998.
  30. G. Kontaxakis, L.G. Strauss and G. van Kaick, "Optimized Image Reconstruction for Emission Tomography Using Ordered Subsets, Median Root Prior, Successive Substitutions and a Web-based Interface", submitted to the 1998 IEEE Medical Imaging Conference, Toronto, Canada, Nov. 11-14, 1998.
  31. G. Kontaxakis and L.G. Strauss, "Evaluation and efficient implementation of iterative image reconstruction methods for dynamic multitracer PET studies", submitted to the RSNA 1998 Meeting, Chicago, USA, Nov. 29 - Dec. 4, 1998.
  32. S.A. Pavlopoulos, D. Koutsouris, E. Lefkokoilos, G. Kontaxakis and L.G. Strauss,  "A PC-based software environment for advanced processing of multitracer dynamic oncological PET studies", submitted to the RSNA 1998 Meeting, Chicago, USA, Nov. 29 - Dec. 4, 1998.