Hologic Faxitron Path - Page 76

FAXITRON PATH USER MANUAL | HOLOGIC | REVISION 024
S
ECTION
S
chedule of
Maintenance
8
8 - 7
Radiation Survey Procedure
1. Take a background radiation reading (point meter toward the center of the room) and record
the value.
2. Configure the system to take a manual image.
a. Click the Device Panel button and select Full Manual.
b. Drag the kV and Time sliders to the far right to maximize the selected kV and Time
values.
c. Click on the “SET” button.
3. Verify that the “Ready” LED is on.
4. Open the chamber door. Place the 1 gallon (4 liter) plastic jug of water on the chamber floo
r
imaging area and close the door.
5. Press the “START” button and survey radiation emissions at the top, front, back, and both
sides of the cabinet. Slowly scan the entire surface with the meter. It should take 1-2 x-ray
exposures to complete each scan. Note: You will have to start x-rays multiple times to
complete the entire survey.
6. Record the readings for each test location.
7. If any readings are higher than the Faxitron radiation emission limit of 0.1 milli-Roentgen
(mR) per hour (1.0 µSv/h) at any point 5 centimeters (cm) outside the external surface (*),
contact a Faxitron representative to discuss repair options.
(*) 0.5 mR/h at 5 cm from external surfaces is the upper limit by US FDA CDRH fo
r
cabinet x-ray systems. If used in another country please check with the hosting country’s
official limits for cabinet based in-vitro diagnostic radiography equipment)
For some countries, the test points should be at 10 cm from external surfaces and in
this case Faxitron radiation emission should read less than 0.1 mR/h at 10 cm from
external surfaces.
8. Remove the jug of water from the x-ray chamber.
9. The bottom of the x-ray cabinet should be surveyed if the system is on a table, or if there are
personnel on the floor below where the system is used. Verify there is nothing in the x-ray
chamber, start an x-ray and scan the bottom of the cabinet. Record reading.
8.8.2 Cont.