Abstract
During the latter part of 1979, a computer-controlled tracking cobalt unit was installed at the Royal Free Hospital, London. It is based on a standard TEM MS90 unit and operates at 90-cm source-axis distance with a geometric field size of 45 x 45 cm at that distance. It has been modified so that it can be used either manually or under computer control. The first modification added drives for the couch lateral and couch longitudinal movements; the longitudinal drive may be operated in positional mode or rate mode. The second modification added the computer interface and servo mechanisms as shown in Figure 1. The final modification was the addition of a small side panel to the radiographers control console, which contains an on/off line switch and a key switch that must be set in order for the shutter to be operated by the computer. (1–3)
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© 1985 Plenum Press, New York
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Brace, J.A. (1985). Computer Systems for the Control of Teletherapy Units. In: Orton, C.G. (eds) Progress in Medical Radiation Physics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2387-7_3
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DOI: https://doi.org/10.1007/978-1-4613-2387-7_3
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