The authors have developed a new classified vector quantizer (CVQ) using decomposition and prediction which does not need to store or transmit any side information. To obtain better quality in the compressed images, human visual perception characteristics are applied to the classification and bit allocation. This CVQ has been subjectively evaluated for a… (More)
The discipline of colleges and universities is in general contrived, not for the benefit of the students, but for the interest, or more properly speaking, for the ease of the masters. Many instructors believe, perhaps implicitly , that learning depends primarily on the teacher. The teacher-centered model of education places all responsibility for… (More)
This article summarizes the current challenges faced by radiology educators. These are discussed under the headings of time available for education, financing education, what and how to teach, student evaluation, support infrastructure, and challenges to leadership.
OBJECTIVE We sought to evaluate the usefulness of coronal and sagittal reformations from isotropic chest computed tomography (CT) examinations. METHODS A total of 30 chest CT examinations were reconstructed into 2 sets of axial source images: 0.9-mm slice width with 0.45-mm reconstruction interval (isotropic) and 4-mm slices with 3-mm reconstruction… (More)
OBJECTIVE. Our objective was to develop a convenient yet comprehensive process for transferring 35-mm radiology slides into a digital teaching-file system capable of delivering online educational content and serving also as a general-purpose digital media repository. CONCLUSION. We believe this approach provides a feasible solution for converting… (More)
In this report, we analyze the feasability and discuss the potential benefits of using currently available technology for the wide-area registration and tracking of mammography patients. In our prototype, three dissimilar computer systems transmitted mammographic data (demographics and the results of mammograms) in a standardized format to a central data… (More)
Twenty-six children diagnosed with chronic tic disorders (18 with Gilles de la Tourette syndrome and 8 with chronic motor tic disorder) were studied for unexplained physical complaints. Compared to normal controls, an excess of somatic complaints was found in the tic disorders group; this was similar to an excess of somatic complaints in a mixed psychiatric… (More)