2017_IGRT course book

Phase vs. Amplitude sorting

2 

0

1 2 3 4 5 6 1 23 4 5 6 1 2 3 4 5 6

1 23 4 5 6 1 2 3 4 5 6

Phase

• Data is linearly divided over the respiratory cycle • More frames in exhale than inhale • If amplitude is irregular  slices do not concatenate (blurring/distortions)

ESTRO IGRT 2017