Table 1. Results of standard MRI analysis and diagnostic performance for treatment response of osteosarcoma.

5-confidence level	Reader 1					Reader 2
	Poor responder (n = 13)			Good responder (n = 4)		Poor responder (n = 13)			Good responder (n = 4)
Score 0, definitely good response	0			0		0			0
Score 1, probably good response	2			1		3			1
Score 2, equivocal	1			2		0			2
Score 3, probably poor response	9			1		10			0
Score 4, definitely poor response	1			0		0			1
Cutoff ≥ Score 2 suggesting poor responder	Sensitivity	Specificity	AUC	Sensitivity	Specificity	AUC
	85%	25%	0.740	77%	25%	0.606

AUC, areas under the curve.