S
Set Up: a procedure whereby the physical parameters (i.e. body position, machine angle) are defined
before the treatment is given. A set up may be done on a simulator, radiation therapy treatment unit, or a
diagnostic X-Ray unit.
Shield: a treatment device,that' generally is custom made which spares radiation to a specific body area.
Simulation: a radiation oncology procedure, performed prior to treatment, carried out on a dedicated
"simulator", radiation therapy treatment unit, or diagnostic X-Ray unit during which the treatment
parameters (patient position, field size, etc.) are defined. This procedure "simulates" the actual treatment
without delivering the radiation dose.
Simulator: a treatment planning machine whose physical parameters mimics those of an actual
radiation treatment unit, but without the high radiation beam energy that actually delivers a treatment.
Sources: refers to intracavitary placement or permanent interstitial placement of radioactive elements.
In contrast to ribbons.
Stereotactic: refers to a method of precisely locating areas in the brain.
T
TBI: total body irradiation. Refers to a radiation beam that encompasses the entire body.
Treatment: specifically, the radiation beam time for each field or more generally all ports that are
treated in one visit.
Treatment Plan: the process whereby the radiation oncologist provides interpretation of tests, tumour
localisation, treatment time/dose determination, choice of treatment modalities, determination of number
and size of treatment ports, selection of treatment devices, etc.
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