Radiographic Parameter Limits
If the value of a radiographic parameter cannot be increased or decreased, one
of these limits may be applied:
•
Radiographic Parameters Limit
. A maximum or minimum radiographic
parameter limit is reached. An information message is displayed.
•
Generator Power Limit
. The generator power limit (kVp x mA) is
reached. An information message is displayed. If the generator power limit
is reached by increasing the mA up to a maximum possible value, you
could increase the kVp up to its maximum value. The mA value will then
automatically decrease as long as the mAs value is kept constant.
•
Space Charge
. The space charge limit in the selected X-ray tube is reached
by changing the kVp or mA values. An information message is displayed.
•
Maximum Energy (60kJ)
. Only in AEC mode, the maximum energy
(60kJ) is exceeded. An information message is displayed.
•
Instantaneous Power
. The instantaneous power limit of the X-ray tube
(ratings limit or the X-ray tube is momentarily overheated) is reached by
selecting some technique. An information message is displayed.
The following table indicates the different information messages that may
appear on the console when increasing or decreasing one of the exposure
parameters.
Table 10: Radiographic parameter limits
Information message Description
Min kVp
Minimum kVp (generator limit)
Max kVp
Maximum kVp (generator limit)
Max kVp Tube
Maximum kVp (limited by the X-ray tube load
curves or limited during the generator
configuration)
Min mA
Minimum mA (generator limit configured for each
focal spot)
Max mA
Maximum mA (generator limit configured for each
focal spot)
Min mAs
Minimum mAs (generator limit)
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