Detection of gastric cancer and its histological type based on iodine concentration in spectral CT

Cancer Imaging

Table 4 The ROC curves of IC and nIC values

ROC	ICAP	ICPP	nICAP	nICPP
Cancer
AUC	0.745	0.662	0.584	0.923
sensitivity	95.40%	98.85%	96.55%	91.95%
specificity	58.33%	43.52%	37.04%	87.96%
Optimum cutoff values	10.343	14.913	0.089	0.364
Youden index	0.537	0.424	0.336	0.799
Poorly differentiated
AUC	0.756	0.851	0. 919	0.684
sensitivity	53.49%	69.77%	79.07%	60.47%
specificity	93.18%	90.91%	97.73%	79.55%
Optimum cutoff values	14.460	20.461	0.125	0.431
Youden index	0.467	0.607	0.768	0.400

Abbreviations: ROC Receiver operating characteristic curves, AUC area under the curve, ICAP arterial phase iodine concentration, ICPP portal venous phase iodine concentration, nICAP normalized arterial phase iodine concentration, nICPP normalized portal venous phase iodine concentration

ISSN: 1470-7330