. Author manuscript; available in PMC: 2022 Dec 20.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2021 Jul 13;111(4):867–875. doi: 10.1016/j.ijrobp.2021.07.003

Table 2.

Descriptive parameters for 516 MR-Linac courses

		n (%)^*
Course details	Total courses	516
Course details	Mixed modalities^†	19 (4%)
Fractions (median [range])		5 (1-35)
Plan adaptation strategy^‡	ATS	328 (64%)
	ATP	152 (29%)
	Mixed (ATP and ATS)	35 (7%)
	Unknown	1 (0.2%)
Discontinued Courses		6 (1%)
	MR-Linac downtime Clinical deterioration^#	3 3

Abbreviations: ATP = adapt-to-position; ATS = adapt-to-shape; MR-Linac = magnetic resonance-linear accelerators.

Numbers (percentage) except where indicated.

^†

Course was delivered using the MR-Linac and a conventional linac or other radiation therapy method.

^‡

In the ATS strategy the plan is adapted based on daily anatomy, whereas during ATP the plan is adapted based on daily patient position.

The reason to discontinue treatment was not related to the MR-Linac treatment in these patients.