Appendix
14 Recommended exposure times
CAUTION
Over-long exposure times can render the X-ray image unusable
❯
Do not exceed the maximum exposure time of 0.5 s.
The following table lists the exposure times for an adult patient.
The exposure time must be increased by 25% for adult patients with a high bone density.
The exposure time for children must be reduced by 30%.
DC emitter, 7 mA
Tube length 20 cm
DC emitter, 7 mA
Tube length 30 cm
60 kV
μGy
70 kV
μGy
60 kV
μGy
70 kV
μGy
Upper jaw
Incisor
0.080 s
605
0.080 s
858
0.160 s
553
0.100 s
478
Premolar
0.120 s
928
0.100 s
1069
0.160 s
553
0.100 s
478
Molar
0.160 s
1243
0.120 s
1276
0.200 s
693
0.125 s
583
Bitewing
0.160 s
1243
0.120 s
1276
0.200 s
693
0.125 s
583
Mandible
Incisor
0.080 s
605
0.080 s
858
0.160 s
553
0.100 s
478
Premolar
0.120 s
928
0.100 s
1069
0.160 s
553
0.100 s
478
Molar
0.160 s
1243
0.120 s
1276
0.200 s
693
0.125 s
583
Bitewing
0.160 s
1243
0.120 s
1276
0.200 s
693
0.125 s
583
Tab. 1: Exposure time for adult patients
Appendix
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