SBRT&StereoscopicIGRT_2012 [Compatibility Mode]

Patient Immobilization
With arms over the head.
Flat lung board with T-bar holder for the arms.
Vacuum Bag
Maximum Intensity Projection (MIP)
CT data is acquired using a Bellows or RPM
device that records a breathing wave.
Maximum intensity values are assigned to pixels
at locations where a tumor moves to over time.
Are a derived dataset of images that show a
“composite” of the tumor volume over the time
period that the CT data was acquired.
4D CT Simulation for LUNG SBRT
CT Scanning procedure for moving target
One free breathing scan – 3 mm slices, entire chest.
One shorter, time-correlated scan – 3 mm slices, to
include the tumor area.
Breathing Waveform is acquired along with CT data
using a Bellows or RPM device.
The CT data acquired in one breath can be binned into
10 equally spaced intervals along the waveform and
reconstructed.
The 10 intervals are called Phases.
Moving Target virtual simulation - Fusion
GTV
MIP dataset
Volume propagation from MIP dataset
to
free breathing dataset
ITV
Free Breathing
dataset
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