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Tumour Motion Model
Observations of movement in target and tumour-bearing
organ:
Amplitude (b)
Period (
τ
)
Phase (
φ
)
Fit observation to a model
(Lujan, Med.Phys. 26(5) May 1999)
z(t) = z
o
– b*cos(
π
t /
τ
-
φ
)
2n
A predictive model could serve as a non-invasive means of
estimating tumour position –
gating or tracking
Adapted from J Hosiak