Browsing by Author "Becich, Michael J"
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- ItemDesign and analysis of a content-based pathology image retrieval system.(2004-03-05) Zheng, Lei; Wetzel, Arthur W; Gilbertson, John; Becich, Michael JA prototype content based image retrieval system has been built employing a client server architecture to access supercomputing power from the physician s desktop The system retrieves images and their associated annotations from a networked microscopic pathology image database based on content similarity to user supplied query images Similarity is evaluated based on four image feature types color histogram image texture Fourier coefficients and wavelet coefficients using the vector dot product as a distance metric Current retrieval accuracy varies across pathological categories depending on the number of available training samples and the effectiveness of the feature set The distance measure of the search algorithm was validated by agglomerative cluster analysis in light of the medical domain knowledge Results show a correlation between pathological significance and the image document distance value generated by the computer algorithm This correlation agrees with observed visual similarity This validation method has an advantage over traditional statistical evaluation methods when sample size is small and where domain knowledge is important A multi dimensional scaling analysis shows a low dimensionality nature of the embedded space for the current test set
- ItemWebcasting pathology department conferences in a geographically distributed medical center.(2004-07-16) Yagi, Yukako; Ahmed, Ishtiaque; Gross, William; Becich, Michael J; Demetris, Anthony J; Wells, Alan; Wiley, Clayton A; Michalopoulos, George K; Yousem, Samuel A; Barnes, Barbara; Gilbertson, John RAs academic pathology departments have become increasingly based in large regional medical systems spread across hundreds of square miles new methods are needed to tie these increasingly distributed departments together as integrated units An important part of that integration is the ability to share academic and teaching conferences across long distances In this article we present an effective low cost webcasting system that has evolved at the University of Pittsburgh Medical Center Department of Pathology over the past several years based on inexpensive widely available software To date the system has broadcast and archived more than 400 conferences and currently serves approximately 80 to 100 requests each week Important factors in the success of the program include the creation of a faculty steering committee to control resources and manage growth the availability of informatics faculty and support for technical staff and the decision to operate the service as part of the core information technology infrastructure of the department Webcasting will likely become an even more important academic and operational tool in the future as more of the department s conferences seminars and even working meetings are communicated through the webcasting infrastructure