X-Ray: The x-ray category covers the problems that affect the
Does the red "X-ray on" light turn on when the cover lock is engaged and
the footswitch is depressed?
11. Model XR 3500/3700 Design Safety Standards and Safe Operating
Practices
Because of the low operating anode power of the XR 3500/3700, real
time x-ray inspection system, it has been registered with the Center for
Devices and Radiological Health Branch of the FDA as an "Analytical X-
ray System". As registered, the system has a number of safety features
provided to minimize any x-ray scatter reaching the operator.
A. Safety:
The X-Ray tube assembly is lead shielded with at least a ¾ inch space
between collimator and image plane to minimize any x-ray scatter.
The collimator insures that the x-ray beam size at the image plane is
no more than a one-inch diameter circle. The table assembly employs
a lead acrylic view panel and additional lead shielding. The highly
sensitive x-ray camera permits the x-ray tube to operate at low power
(anode voltage of 50/70 kV and anode current of 25 micro amps)
resulting in minimal x-ray scatter. All these safety features result in a
structure with radiation scatter at 5 cm from any exposed surface less
than 0.3 mill Roentgens per hour. (Radiation exposure in an airplane
at 30,000 feet during the day is greater than 0.4 mill Roentgens per
hour.)
Does the systems image processor boot up?
Does the X-ray monitor have a light gray screen or
flicker?
tube's emission of x-rays. The x-ray category includes:
- The red "X-Ray On" light is not turning on.
- There is no image on the monitor, but video signal is
present.
- There are no x-rays being emitted from the x-ray source.
Does an X-ray image appear on the monitor when
the foot pedal is depressed?
13