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4 - 1 dimensional radiation therapy plan in order switched video system supported by a DS-3 to deliver higher doses of radiation to tumors (45 Mb/s) fiber optic network. Each while minimizing the radiation levels to classroom contains two cameras and surrounding tissue. It is possible to support monitors at the front of the room for this application-with conventional state of students to view the teacher and/or =note the art graphics computers; however, it classes, and a large screen monitor at the would take anywhere from several minutes rear of the room for the teachers to view to a couple of hours to get the projected remote classrooms. A high quality overhead results from a proposed treatment plat camera is also available for sending a variety Using the broadband network to access the of images. Continuous presence audio is supercomputer allows this process to be another very important feature of this completed in two seconds or less. Without system. It provides for "mixing" of the the response times provided by such a high audio from all remote locations, allowing performance network, radiation oncologists students to ask spontaneous questions or would find the application to be much less provide answers just as if they were in the desirable to use because of the waiting classroom with the teacher. A "quad- periods required to develop each treatment splitter" is incorporated into the video plan. This time factor would restrict the switches to allow up to four remote number of plans that could be evaluated by classrooms to be shown on the same a radiation oncologist, and therefore may monitor. The entire system (camera ':• compromise the quality of the chosen positions, zoom, audio levels, etc.) is treatment plan. With VISTAnet, a physician controlled by a facilitator in each classroom. can evaluate hundreds of plans in order to In most cases the facilitator is a staff ensure that the optimum plan is ehosaL member, but in some instances a student has Furthermore, access to such specialized provided that function. . resources over a high performance netwuxic avoids the need to duplicate medical and There are several potential benefits of a technical equipment and expertise at each distance learning system such as the Vision treatment location. Carolina project. The most obvious is the ability to offer a much broader array of • Vision Carolina is another application and classes than would otherwise be available. technology trial that has been underway in This is particularly important for small rural North Carolina. It began at the start of the schools where. the number of students 1991-1992 school year, and will Continue interested in a particular is not sufficient to until the end of the 1993-1994 school year. justify a teacher, even if a qualified teacher Vision Carolina is a distance learning trial were available. This would typically be the that consists of sixteen locations in the case for specialized classes such as advanced Charlotte and Wilmington metropolitan physics, calculus, or a variety of foreign areas. While these locations are primarily languages. Unfortunately, many teachers public high schools, they also ,include teaching these classes today are not certified community colleges, universities, and a to do so. A distance learning system would regional medical center. make specialized classes available for very small groups of interested students. During Vision Carolina utilizes a high quality the Vision Carolina trial high school students 3 i1 •