| | Igor Dvorchik, PhD
Research Assistant Professor, Surgery (Primary)
Research Assistant Professor, Biostatistics (Secondary) Education MSc, Kharkov State University
PhD, St Petersburg Electrotechnical University Research Interests Multi-layer and recurrent artificial neural networks; (ANN) as a modeling tool. Data preprocessing and missing values treatment in ANN analysis. Semi-parametric and nonparametric survival estimation. Multivariate survival analysis and modeling in areas of transplantation and cancer research. Evaluation of diagnostic systems, development of clinical decision-making systems. Cost-effectiveness, cost-minimization and cost-utility analysis. Design and analysis of clinical trials and studies Selected Publications "Liver Transplantation for Hepatocellular Carcinoma: a Proposal of Prognostic Scoring System." Iwatsuki S, Dvorchik I, Marsh JW, Madariaga JR, Carr B, Fung JJ, Starzl TE. Journal of the Americal College of Surgeons 191:389-395, 2000. "Liver Transplantation and Chemotherapy for Hepatoblastoma and Hepatocellular Cancer in Childhood and Adolescence." Reyes JD, Carr B, Dvorchik I, Kocoshis S, Jaffe R, Gerber D, Mazariegos GV, Bueno J, Selby R. Journal of Pediatrics 136(6):795-804, 2000. "Is the Pathologic TNM Staging System for Patients with Hepatoma Predictive of Outcome?" Marsh JW, Dvorchik I, Bonham CA, Iwatsuki S. Cancer 88(3):538-543, 2000. "Hepatic resection for metastatic colorectal adenocarcinoma: a proposal of a prognostic scoring system." Iwatsuki S, Dvorchik I, Madariaga JR, Marsh JW, Dodson F, Bonham AC, Geller DA, Gayowski TJ, Fung JJ, Starzl TE. Journal of the American College of Surgeons 189(3):291-9, 1999. "Should Hepatomas Be Treated with Hepatic Resection or Transplantation?" Yamamoto J, Iwatsuki S, Kosuge T, Dvorchik I, Shimada K, Marsh JW, Yamasaki S, Starzl TE. Cancer 86:1151-8, 1999. "Simultaneous Administration of Adjuvant Donor Bone Marrow in Pancreas Transplant Recipients." Corry RJ, Chakrabarti PK, Shapiro R, Rao AS, Dvorchik I, Jordan ML, Scantlebury VP, Vivas CA, Fung JJ, Starzl TE. Annals of Surgery 230(3):372-381. "An Analysis of Pretransplant Variables Associated with Long-Term Allograft Outcome in Pediatric Liver Transplant Recipients Receiving Primary Tacrolimus (FK 506) Therapy." Cacciarelli TV, Dvorchik I, Mazariegos GV, Gerber D, Jain AB, Fung JJ, Reyes J. Transplantation 68(5):650-655, 1999. "Optimization of Feedforward Neural Network Classifier Based on a Concept of Determinate Zone of a Model." Dvorchik I, Marsh JW, Popechitelev EP. Proceedings of International Conference on Soft Computing and Measurements - SCM'98. b.2 - S.Petersburg. - 22-26, pp.326-328, 1998. "The Prediction of Risk of Recurrence and Time to Recurrence of Hepatocellular Carcinoma After Orthotopic Liver Transplantation: A Pilot Study." Marsh WJ, Dvorchik I, Subotin M, Ballan V, Rakela J, Popechitelev EP, Subbotin V, Casavilla A, Carr BI, Fung JJ, Iwatsuki S. Hepatology, 26(2): 444-450, 1997. "Performance of Multi-Layer Feedforward Neural Networks to Predict Liver Transplantation Outcome." Dvorchik I, Subotin M, Marsh W, McMichael J, and Fung JJ. Methods of Information in Medicine, 35:12-18, 1996. "Multisolutional Clustering and Quantization Algorithm (MCQ)." Dvorchik I, Marsh W, Gurari V, Subotin M, Doyle HR. Computers in Biology and Medicine, 26(5):439-450, 1996. "Predicting Outcome after Liver Transplantation: A Connectionist Approach." Doyle HR, Dvorchik I, Mitchell SH, Marino IR, Ebert F, McMichael J, Fung JJ." Annals of Surgery, 219(4):408-415, 1994. Contact Information Falk Medical Building, 4th Floor
Pittsburgh, PA 15261
Telephone: 412-647-3231
Facsimile: 412-647-5165
Email: idv@pitt.edu |  |
