Purpose: Triggered imaging is the use of kV image acquisition during treatment delivery to monitor intrafractional motion of implanted fiducials. An automatically identified fiducial point on the kV image is compared to its expected position predetermined from the treatment planning CT, and the treatment can be paused if the difference exceeds a user-definable tolerance.
Conclusion: Triggered imaging seems to perform satisfactorily when used in combination with well-separated and compressed Gold Anchor fiducials.
Abstract from Sahlgrenska University Hospital, Gothenburg, Sweden 2018