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Users Manual Part 7

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IBA | H-6 |
Clinical User’s Guide
Volume 1 - Treatment Session
Glossary of Terms
|
Dose Counter Electronic Unit (DCEU)
An electronic device that interfaces with a dosimetry counter located in each TCR.
See also: Electronic Unit.
Dosimetry Device
Allows for the calibration of a dose monitor. Dosimetry devices are used to allow
correlation of dosimetry data between the beam production into the nozzle,
dosimetry device operation, and acquisition of data for visualization. Among the
dosimetry devices are the ion chamber with electrometers and water phantoms. See
also: Dose Monitor, Nozzle.
Dual In-line Package (DIP)
Refers to standard Integrated Circuit (IC) packaged parts. A type of electrical switch
used in the PTS. See also: Proton Therapy System.
E
p
-I
p
Curve
The characteristic curve of an electron tube used to graphically depict the relationship
between plate voltage (E
p
) and plate current (I
p
).
Electrically Erasable PROM (EEPROM)
A user-modifiable Read-only Memory (ROM) that can be erased and reprogrammed
(written to) repeatedly through the application of higher than normal electrical
voltage. Unlike EPROM chips, EEPROMs do not need to be removed from the
computer to be modified. However, an EEPROM chip has to be erased and
reprogrammed in its entirety, not selectively. It also has a limited life — that is, the
number of times it can be reprogrammed is limited to tens or hundreds of thousands
of times. In an EEPROM that is frequently reprogrammed while the computer is in
use, the life of the EEPROM can be an important design consideration.
A special form of EEPROM is flash memory, which uses normal PC voltages for
erasure and reprogramming.
Electromagnetic Field (EMF)
A condition present in the area of electrical devices.
Electromagnetic Interference (EMI)
A condition present in the area of electrical devices.
Electronic Unit (EU)
One of many electronic devices used throughout the PTS. See also: Proton Therapy
System.
End-of-travel (EOT)
A specified travel limit of a device. See also: Patient Positioning System.