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Saint Louis University created a 24/7 remotely accessible "computer laboratory" where students receive full server administration privileges to use in developing their server, networking, security, and database administration skills using the Linux operating system. The university's decision to outsource the computer lab to MDK was simple. The resulting partnership provided each student in a senior-level undergraduate Web Applications and Architectures course with a virtual Linux server as well as full administrative rights.

Compton scattering of gamma rays within the image volume has been assessed for a large-aperture positron-emission-tomography imaging system. The Compton scattered attenuation and the Compton scattered background were both modeled and measured for point sources centered in scattering spheres up to 10 cm in diameter. Good agreement was obtained between simulations and measurements. The attenuation problem is independent of the detector system, but its correction is more difficult in a large-aperture system. The scattered coincidence background is large in this system (43% for a 10-cm-diameter scattering sphere), but the background overlap is reduced with 3D imaging. >