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There are several quick checks you should carry out each day you use Kr81m generators.
 | Carry out the normal daily checks, in particular a flood image using Co57 or Tc99m |
| Check the correct collimator is fitted |
| Check the generator is OK with the bubble test |
| Check that the Kr81m energy window is peaked correctly (use the
bubble test) |
| Check the generator activity on the delivery note. If a lower activity than usual has
been delivered this will affect imaging times. If a higher activity than usual has been
delivered then any dual acquisition protocols may need to be altered. |
| Kr81m activity can be measured directly by two methods, but
this can be considered an optional QA issue. |
Bubble Test
This is a very simple test which should be carried out
when the Kr81m generator is set up for use in the camera room.
- Put about 200ml water in a 500ml beaker
- Place the output line from the generator into the water
- Start the air flow through the generator and check that
there are vigourous bubbles in the water
- If the beaker is sitting in front of the camera, then the
Kr81m camera energy peak can be checked at the same time (beware any water splashes onto
the camera)
- If there are no bubbles or a poor flow then suspect a leak or blockage
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