Application of 18F-fluorodeoxyglucose positron emission tomography/computed tomography imaging in recurrent anastomotic tumors after surgery in digestive tract tumors

Table 3 Dynamic positron emission tomography/computed tomography parameters and diagnostic efficacy of lesion/background ratio

Parameters	Sensitivity (%)	Specificity (%)	Threshold value	Youden index	AUC (95%CI)
Gastric cancer
MRFDG	84.62	81.25	0.11	0.659	0.904 (0.736-0.981)
DVmax	76.92	75	112%	0.519	0.808 (0.619-0.929)
LBR-MRFDG	92.31	81.25	1.83	0.736	0.935 (0.778-0.993)
LBR-DVmax	84.62	75	1.77	0.596	0.837 (0.653-0.947)
Esophageal cancer
MRFDG	81.82	84.62	0.13	0.664	0.881 (0.684-0.976)
DVmax	90.91	76.92	117%	0.678	0.853 (0.650-0.963)
LBR-MRFDG	90.91	76.92	1.86	0.678	0.927 (0.743-0.993)
LBR-DVmax	81.82	84.62	1.38	0.664	0.888 (0.693-0.979)

MRFDG: Fluorodeoxyglucose metabolic rate; LBR: Lesion/background ratio; ROC: Receiver operating characteristic; DV: Volume distribution; AUC: Area under the curve; CI: Confidence interval.