Experimental setup: (a) brief diagram of entire setup (top down view), (b) prototype linac-MR and phantom setting with RF cage open, (c) side view with RF cage closed.
Sample bSSFP sequence used to perform tracking in this study.
Motion phantom: (a) phantom parts, (b) assembled phantom, (c) MR image during tracking and beam delivery, (d) phantom and RF coil placed in the linac-MR.
Overview of intrafractional tumor tracking.
Encoder reading comparisons from phantom and MLC (recorded every 50 ms during tracking). The readings correspond to scenarios S2–S4 and the two motion patterns are shown.
Film measurement in different scenarios using the sine and modified cosine motion patterns.
Summary of time requirements to perform Steps 1–13.
Beam and penumbra width in different scenarios.
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