Table II.

The associations (Rs) between rectal morbidity and the dDVHs given the 0.02 increase criterion in the Rs-value for the dDVH compared to the Rs-value for the pDVH, summarised for isotropic and anisotropic motion with σ = 0.2, 0.5 and 0.8 cm given for the dose levels (Gy) investigated. The increase in associations was seen especially at intermediate doses (45-60 Gy). Isotropic motion provided stronger associations also at low doses (≤ 20 Gy). Applying anisotropic random motion, the associations were stronger also at high doses (≥ 60 Gy).

	Isotropic									Anisotropic
Dose [Gy]	σ Random			σ Systematic			σ Random + systematic			σ Random			σ Systematic			σ Random + systematic
	0.2	0.5	0.8	0.2	0.5	0.8	0.2	0.5	0.8	0.2	0.5	0.8	0.2	0.5	0.8	0.2	0.5	0.8
3				0.06
5
10		0.08	0.08	0.08	0.1		0.08		0.1
15							0.07
20		0.09	0.1						0.1
25
30									0.1
35
40
45		0.05	0.07						0.05		0.03	0.06						0.03
50		0.03	0.06						0.04		0.02	0.04						0.03
55		0.04	0.07									0 05
60			0.07
65
70											0.1