37
X-ray Controls and Generator
Output power 150W nominal at 60kV, 2.5mA
Generator rating 2.5mA (±5%) at 60kVp (±10%)
Leakage technique factors 60kV, 2.5mA, 1.00 sec.
Maximum air kerma at handgrips and
control panel
<0.02mGy in 1 hour
Measurement Base of Technique Factors
The kV is measured during pre-pot testing using a calibrated high voltage divider with a
guaranteed accuracy of ±2%. Final performance measurements are made using a NERO
mAx model 8000 X-ray meter from Victoreen. Tube current (mA) is sensed across a series
connected resistor with an accuracy of ±1% and measured using a digital multimeter,
prior to encapsulation; the NOMAD Pro 2 has no provision for external measurement
of beam current after final manufacture. Exposure time is measured during the entire
exposure, references to 75% rise/fall, using the NERO mAx model 8000 X-ray meter.
Collimator Cone
Minimum source to skin distance 20cm (from focal spot to cone tip)
Nominal dose output at cone tip (20cm) 3.41mGy/sec.
X-ray field size and configuration 6cm diameter circle