Table 2.

Threshold values with associated ROC-curve derived sensitivity and specificity values ranging from 100% sensitivity to 100% specificity for differentiation of truncation artifact and pulmonary embolism.

	Arterial Phase			Delayed Phase
Threshold	>51.4	>52.9	>58.1	>46.9	>48.8	>55.1
Sensitivity (95% CI)	100.0 (80.5 – 100.0)	94.1 (71.3 – 99.9)	94.1 (71.3 – 99.9)	100.0 (80.5 – 100.0)	94.1 (71.3 – 99.9)	88.2 (63.6 – 98.5)
Specificity (95% CI)	93.8 (82.8 – 98.7)	93.8 (82.8 – 98.7)	100.0 (92.6 – 100.0)	91.7 (80.0 – 97.7)	93.8 (82.8 – 98.7)	100.0 (92.6 – 100.0)