Table 2.

PTV coverage differences between CT‐based and MRI‐based dose calculations. Negative differences signify smaller volumes on MRI. Note: Plans for Patients 1 and 3 did not include PTV59

	MRI(W)
	Patient 1	Patient 2	Patient 3	Patient 4	Patient 5	Patient 6	Patient 7
PTV59 (V100%)	‐	5.3%	‐	3.5%	2.7%	3.7%	5.8%
PTV59 (V93%)	‐	0.0%	‐	0.0%	0.2%	2.2%	$‐0.1\%$
PTV63 (V100%)	1.7%	3.6%	9.9%	8.3%	2.3%	6.5%	9.8%
PTV63 (V93%)	0.3%	0.2%	1.2%	1.7%	0.7%	1.7%	0.4%
PTV70 (V100%)	12.0%	18.2%	65.0%	12.9%	6.5%	14.0%	65.5%
PTV70 (V93%)	0.0%	0.1%	0.1%	0.0%	0.8%	0.9%	0.1%
	$MRI\left(W\hspace{0.17em}+\hspace{0.17em}B\right)$
	Patient 1	Patient 2	Patient 3	Patient 4	Patient 5	Patient 6	Patient 7
PTV59 (V100%)	‐	1.0%	‐	$‐1.8\%$	1.7%	1.8%	1.6%
PTV59 (V93%)	‐	0.0%	‐	0.0%	0.1%	1.6%	0.2%
PTV63 (V100%)	$‐0.1\%$	0.7%	2.2%	1.4%	1.0%	2.4%	1.9%
PTV63 (V93%)	$‐0.0\%$	0.1%	0.7%	1.3%	0.4%	1.0%	0.2%
PTV70 (V100%)	$‐0.2\%$	0.9%	5.7%	0.4%	2.5%	2.2%	2.6%
PTV70 (V93%)	$‐0.1\%$	0.0%	$‐0.1\%$	0.0%	0.6%	0.5%	0.0%
	$MRI\left(W\hspace{0.17em}+\hspace{0.17em}B\hspace{0.17em}+\hspace{0.17em}A\right)$
	Patient 1	Patient 2	Patient 3	Patient 4	Patient 5	Patient 6	Patient 7
PTV59 (V100%)	‐	1.6%	‐	$‐0.1\%$	0.3%	2.6%	1.7%
PTV59 (V93%)	‐	0.0%	‐	0.0%	0.0%	1.6%	$‐0.1\%$
PTV63 (V100%)	0.3%	$‐0.3\%$	2.9%	2.0%	0.8%	2.0%	2.6%
PTV63 (V93%)	0.1%	$‐0.4\%$	0.9%	0.0%	$‐0.1\%$	1.3%	0.3%
PTV70 (V100%)	1.5%	1.7%	7.4%	3.5%	4.1%	3.7%	2.6%
PTV70 (V93%)	$‐0.1\%$	$‐0.1\%$	0.0%	0.0%	0.7%	0.3%	0.0%