Simulator Flashcards
A machine that uses x-ray tube but imitate all of the mechanical, geometrical and optical features of the treatment plan.
Simulator
Purpose of Simulator
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Determining thr extent of the tumor and location of critical organs
Tumor localization
Verifies the accuracy of treatment plan
Treatment verification
2 types of simulator
X-ray simulator
CT simulator
C shaped, structural support the gantry (both x-ray tube and image intensifier)
Gantry Arm
The fixed point in space where the gantry rotates
Isocenter
Location: central point of rotation of the gantry arm used to measure the gantry angle
Protractor
Has a large and small focal spot
X-ray tube
Small focal spot ahould not be greater than
0.6 mm
To obtain a sharp image of the field defining wires
X-ray tube
Similar to digital x-ray. Used for taking portal images
Beam view
Converts x-ray image into light image
Image intensifier
Location: other side of the gantry arm
Image intensifier
A device which a patient is positioned during treatment or simulation
Patient table top