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. 2020 Dec 22;298(2):248–260. doi: 10.1148/radiol.2020202747

Figure 2:

Schematic description of interfraction and intrafraction adaptation to organ motion by using online MRI-guided radiation therapy with a hybrid MRI-guided linear accelerator system. For interfraction adaptation, treatment is adjusted according to the image of the day (dashed lines show the position of the tumor and organ at risk for fraction 1). Intrafraction adaptation uses real-time imaging to adjust treatment according to continuous and/or sporadic organ motion within each fraction (dotted lines show the position of the tumor and organ at risk for the first point of real-time imaging).

Schematic description of interfraction and intrafraction adaptation to organ motion by using online MRI-guided radiation therapy with a hybrid MRI-guided linear accelerator system. For interfraction adaptation, treatment is adjusted according to the image of the day (dashed lines show the position of the tumor and organ at risk for fraction 1). Intrafraction adaptation uses real-time imaging to adjust treatment according to continuous and/or sporadic organ motion within each fraction (dotted lines show the position of the tumor and organ at risk for the first point of real-time imaging).