X-ray systems having individually measurable emitters

A method comprising:

• supplying tube current from a high voltage direct current (DC) voltage supply to plural emitter circuits to cause filaments in the filament circuits to generate x-rays;
• supplying an alternating current (AC) for each of the emitter circuits to cause the filaments in the filament circuits to generate the x-rays;
• and
• independently measuring current for the filaments in the emitter circuits through a current measurement device disposed between the high voltage DC supply and the emitter.

An x-ray system comprising:

• one or more alternating current (AC) power supplies configured to supply drive currents;
• plural filaments configured to receive the drive currents to generate x-rays;
• and
• plural current measurement devices coupled with the filaments and with a high voltage supply, the current measurement devices configured to independently measure tube currents of each of the filaments.