Detecting Triple-Vessel Disease with Cadmium Zinc Telluride-Based Single-Photon Emission Computed Tomography Using the Intensity Signal-to-Noise Ratio between Rest and Stress Studies

Table 3

Statistics and the ROC results of the image-derived SNR at rest and stress and the ratio of the , , and RSNR.

Parameter							RSNR
	All	Control	TVD	All	Control	TVD	All	Control	TVD
Mean	4.09	4.03	4.18	3.92	4.24	3.44	0.97	1.06	0.83
SD	0.70	0.73	0.66	0.85	0.83	0.65	0.2	0.17	0.15
Sensitivity		83			76			85
Specificity		43			75			90
Accuracy		59			75			88
AUC		0.57			0.78			0.88
Cutoff		3.74			3.7			0.94
value	0.26

value is derived from the -test of the control versus TVD subjects. SNR, signal-to-noise ratio; , signal-to-noise ratio at the rest study; , signal-to-noise ratio at the stress study; RSNR, stress-to-rest ratio of the signal-to-noise ratio.