Table 4. Average percentage of true diagnoses of three observers using different detection methods.

	Visual inspection	Film	CCD	PSP	Iluma
No caries (%)	92	89.2	94.6	91.3	94.8
Enamel caries (%)	18.7	10.6	11.3	12.2	7.3
Dentine caries (%)	4.4	17.8	12.6	13.3	11.8
Deep dentine caries (%)	24.3	40.2	56.2	47.9	58.3

CCD, charge-coupled device; PSP, photostimulable phosphor