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Annuncio Seminario



            POLITECNICO DI MILANO DIPARTIMENTO DI MATEMATICA

                          Annuncio di Seminario

   Giovedi 20 giugno 1996 - ore 11 - Auletta del 6. piano Palazzo Nave

              TIMING MEDICAL EXAMS VIA INTENSITY FUNCTIONS

              Gianni Parmigiani (Duke University, NC, USA)

                                Abstract

This lectures presents decision theoretic methods for timing medical 
exams.  The specific model is motivated by screening ---that is examining 
asymptomatic individuals for hidden disease or risk-increasing 
conditions. Ideas and strategies may be applied more broadly to problems 
in which a stochastic process is monitored over time with a costly and 
possibly faulty data collection procedure.

>From a technical viewpoint, I will contrast approaches based on recursive 
dynamic techniques to approaches  based on modeling the decision space as 
a space of functions.  I will discuss computational algorithms and, in 
simple cases, explicit rules for deciding whether or not an individual of 
given age and risk factors should be screened for a disease, and for 
deciding when an individual examined today should be examined again.

Methods are illustrated with data on breast cancer screening.
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  Federico Marchetti * Politecnico di Milano * Dipartimento di Matematica
          piazza Leonardo da Vinci 32 * I-20133 Milano, Italy
           phone: (+39-2)2399-4570 * fax: (+39-2)2399-4568
   e-mail: marchett@ipmma3.mate.polimi.it   anonymous ftp: 131.175.23.165