| Function |
Conventional
Simulation |
CT Simulation |
Patient alignment
|
From x-ray
film
|
From scout
(pilot, topogram)views
|
Localization
|
Interpretation
of anatomy on x-ray film, optionally CT assisted
|
Definition
of contours from original or reformatted CT
Digital fluoroscopy
|
Reference
point definition
|
Directly from
film, then table and/or laser adjustments
|
Directly form
CT, then table and/or laser adjustments
|
Initial isocenter
|
From film
|
From axial
CT
Scout or DRR
|
Portal design
|
Films pre-RTP
|
DRR pre-RTP
(virtual simulation)
|
Verification
|
BEV films
post RTP
Visual via skin marking
|
DRR post RTP
3-D reconstructions
|
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