Inter-tester reproducibility of tumour change in small cell lung cancer patients undergoing chemoradiotherapy

Figures & data

Figure 1. Number of patients with Radiation Oncologist (RO) assessed tumour shrinkage ≥ 5 cm³ or 15% compared to the deformable image registration (DIR) and visual radiation therapist (Visual-RTT) assessments at the last treatment fraction of radiotherapy.

Table I. Inter-tester reproducibility of tumour change between deformable image registration (DIR) and visual radiation therapist (Visual-RTT) assessment for every 5th fraction of radiotherapy.

	Observed agreement (%)	Kappa
Fr 1	91.9	0.84
Fr 6	89.2	0.79
Fr 11	94.6	0.89
Fr 16	83.8	0.68
Fr 21	97.3	0.95
Fr 25/26	96.8	0.93
Fr 30	93.5	0.87

Figure 2. Bland Altman plot of the mean compared to the difference in tumour volume change obtained by the DIR and RO with 95% limits of agreement (broken lines).