Philips CARDIOMD Service Manual page 367

CAUTION
RADIOACTIVE
MATERIAL
Radiation from the line source is shut off / activated by means of a shutter. Furthermore, the line
source housing has an attenuator permitting reduction of radiation from a new line source.
Shutter Mechanism
The shutter closes the line source housing's aperture, thereby shutting off radiation from the line
source.
Attenuator
Figure 12.16 Line source housing with shutter and attenuator
Shutter in
closed position
Gd-153 line
source
Shutter open
Shutter closed
Figure 12.17 Inside of line source housing showing shutter mechanism
1MAN0158-H11 04-2005 CSIP Level 1
WARNING
The line source housing must not be taken apart. When the line source needs to
be replaced, the entire line source housing is returned to the supplier. See the
section Returning the Used Line Source to the Vendor, page 12-74 for instruc-
tions.
Due to the Gd-153 source, the CardioMD line source housings contain
significantly higher levels of radiation than normally used in clinical imaging.
Potential for radiation exposure exists. Use good radiation safety practices.
Handling of line source housings with Gd-153 sources installed shall only be
performed by Philips Nuclear Medicine employees that have had radiation
safety training classes and trained on proper handling of radioactive material.
Shutter
Aperture
1.5 mm aperture
performing double
collimation
CardioMD AC Option
CardioMD Service Manual 12-19