Table 2.

The time from SRT initiation or CTS to the mid-treatment MRI scan

Definition	Median period (days)
From SRT initiation to the mid-treatment MRI scan	6 (range 3–11)
From CTS to the mid-treatment MRI scan	8 (range 6–17)
From the MRI scan before CTS to the mid-treatment MRI scan	14 (range 7–28)
From the MRI scan before CTS to SRT initiation	8 (range 3–21)

SRT stereotactic radiotherapy, MRI magnetic resonance imaging, CTS CT simulation