Reduction of Radiation Dosage in Visualization of Paranasal Sinuses in Daily Routine

Table 2

Overview of the frequencies in percent of the evaluation of the visibility of the different anatomical structures in the two groups (high dosage versus low dosage) with the corresponding values (values marked with an asterisk are highly significant).

	High dosage ()				Low dosage ()				value
	Excellent	Well	Poor	Not evaluable	Excellent	Well	Poor	Not evaluable
Maxillary sinus (lateral wall)	79.6	15.5	4.9	0.0	80.7	15.3	4.0	0.0	0.791
Uncinate process	66.9	18.8	13.4	0.9	67.4	11.1	14.8	6.7	0.022
Inferior turbinate (os turbinale)	87.8	7.0	4.3	0.9	87.0	7.3	4.3	1.3	0.917
Infraorbital nerve canal	54.5	32.4	12.7	0.3	59.3	29.3	11.3	0.0	0.682
Lamina papyracea (infundibulum)	85.8	9.1	5.2	0.0	93.7	5.0	1.3	0.0	0.119
Anterior ethmoidal artery canal	84.2	11.5	3.6	0.6	91.7	7.7	0.7	0.0	0.107
Lamina papyracea (ant. ethm. art.)	95.2	1.8	3.0	0.0	97.0	2.3	0.7	0.0	0.248
Lateral lamella olfactory fossa	86.4	10.0	3.6	0.0	93.3	3.7	3.0	0.0	0.148
Cribriform plate	94.4	27.0	21.8	1.8	73.0	18.7	8.3	0.0	0.000
Posterior ethmoidal artery canal	67.9	15.8	10.0	6.4	75.7	13.0	8.7	2.7	0.238
Optical nerve	93.3	4.3	2.4	0.0	98.3	1.3	0.3	0.0	0.176
Vidian nerve	94.2	2.1	3.0	0.6	97.7	2.3	0.0	0.0	0.211
Maxillary nerve	95.4	2.4	2.1	0.0	99.0	0.7	0.3	0.0	0.320
Carotid artery	83.0	12.8	3.5	0.6	97.7	1.7	0.7	0.0	0.003
Nasolacrimal duct	98.5	1.5	0.0	0.0	99.3	0.7	0.0	0.0	0.406
Frontal sinus	98.2	1.2	0.6	0.0	99.3	0.7	0.0	0.0	0.386