13
Does the systems image processor boot up?
Does the X-ray monitor have a light gray screen or
flicker?
X-Ray
: The x-ray category covers the problems that affect the
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?
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.)