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2-D Verification
• Visualisation of bony anatomy, some soft tissue, implanted
radio-opaque markers.
• Only suitable for tumours closely related to bony anatomy
and/or restricted tumour movement.
• Used for
•
QA: Measurement of beam shape
•
In vivo dosimetry
• Orthogonal portal images acquired at cardinal angles allow
field placement assessment in 3 directions:
•
AP for LR and SI displacement;
•
LAT for AP and SI displacement.
• It may be necessary to produce fields for imaging purposes
only.