18F-Fluorodeoxyglucose positron emission tomography [18F-FDG PET CT] in assessment of patients with vocal cord paralysis [VCP] secondary to extra laryngeal neoplastic causes: How is it reliable?

Egyptian Journal of Radiology and Nuclear Medicine

Table 3 Comparison between CT and hybrid PET CT parameters in reference to any positive result detected by either CT or PET CT

Parameter	TP	TN	FP	FN	Accuracy	Sensitivity	Specificity	PPV	NPV
CT findings	29	5	0	16	56.0	68	100	100	23.8
Hybrid PET CT	44	5	0	1	86.0	98	100	100	83.3

Sensitivity is the percentage of positive results detected by CT and PET CT out of the total positive results detected by either modality. According to this table, hybrid PET CT has a higher sensitivity than CT alone (98% vs. 68%) and a lower FN rate (1 vs. 16). This suggests that hybrid PET CT is more accurate and reliable than CT alone for detecting positive results.