The process of radiation
therapy involves an intricate balance of human skills
and technology and includes a number of steps. The
primary ones are:
Simulation
This is the first step in preparing the patient for
External Beam Radiation on the Linear Accelerator. This
is performed using a specialized X-Ray machine called a
Simulator. The Simulator allows the technical team to
visualize the internal organs of the patient from any
angle; and to locate and determine the exact size of the
tumour/cancer to be treated.
This procedure pinpoints
the precise area where the high-energy radiation will be
aimed during treatment. This area is marked on the
patient's skin or the immobilization cast with a special
ink to ensure that the treatment is administered in the
same place throughout the course of therapy.
Medical Physics
Based on the information acquired from Simulation, the
technical aspects of the treatment are then planned in
the Medical Physics Unit using a 3-D Computerized
Treatment Planning System. Here calculations are done to
determine the exact dose of radiation necessary for
treatment, and decisions made regarding the best shape
and angles for the treatment beams to be applied to the
affected area.
See
Treatment & Frequency and Duration of Treatment...
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