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Phase vs. Amplitude sorting
• Data is linearly divided over the respiratory cycle
• More frames in exhale than inhale
• If amplitude is irregular
slices do not concatenate
(blurring/distortions)
0
2
1 23 4 5 6 1 2 3 4 5 6
1 2 3 4 5 6
1 23 4 5 6 1 2 3 4 5 6
Phase
ESTRO IGRT 2018