Ultrafast Cone-Beam Computed Tomography: A Comparative Study of Imaging Protocols during Image-Guided Therapy Procedure

Table 7

Displayed sensitivity and predictive values, calculated using UF-CBCT imaging protocols 1 and 2 and magnetic resonance image data.

Type of tumor	Interpreted as tumor on		True positive	False negative	False positive	True negative	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)
	MRI	UF-CBCT protocol 1
Hypoenhanced tumors	41	28	23	18	5	0	56	0	82	0
Heterogeneously enhanced tumors	44	33	27	17	6	0	61.3	0	81.8	0
Homogeneously enhanced tumors	46	34	29	17	5	0	63	0	85.3	0
	MRI	UF-CBCT protocol 2
Hypoenhanced tumors	43	40	36	7	4	0	83.7	0	90	0
Heterogeneously enhanced tumors	41	37	34	7	3	0	82.9	0	91.9	0
Homogeneously enhanced tumors	45	43	41	4	2	0	91	0	95.3	0