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Merck

The structural failure of a multi-hole collimator.

Nuclear medicine communications (2000-11-07)
A M Harris, R J Ward
ABSTRACT

During measurements of the extrinsic spatial resolution of a gamma camera, it was noted that there was a variation with the position in the field of view. The problem was traced to the collimator, and this was confirmed by inspection of the parallel hole structure. Removal of the cover showed that the lead foil honeycomb had become detached from its surround. The fault could have had serious implications for the quality of patient investigations and could also have caused damage to the crystal if it had gone undetected. As a result of this investigation, the quality assurance procedures within this department have been updated to include a visual check of all collimator cores.

MATERIALS
Product Number
Brand
Product Description

Lead, foil, 10mm disks, thickness 0.5mm, as rolled, 99.99+%
Lead, foil, 15mm disks, thickness 0.01mm, 99.99+%
Lead, foil, 10mm disks, thickness 0.03mm, 99.99+%
Lead, foil, 25mm disks, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 4mm disks, thickness 0.009mm, 99.99+%
Lead, foil, not light tested, 50x50mm, thickness 0.004mm, 99.99+%
Lead, foil, 4mm disks, thickness 0.025mm, 99.99+%
Lead, foil, light tested, 50x50mm, thickness 0.015mm, 99.99+%
Lead, foil, 8mm disks, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 50x50mm, thickness 0.125mm, as rolled, 99.99+%
Lead, foil, 0.5m coil, thickness 0.25mm, as rolled, 99.95%
Lead, foil, 25x25mm, thickness 0.25mm, as rolled, 99.99+%
Lead, foil, 10mm disks, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 1m coil, thickness 0.05mm, as rolled, 97% (sn 1.5%, sb 1.5%)
Lead, foil, light tested, 100x100mm, thickness 0.05mm, as rolled, 97% (Sn 1.5%, Sb 1.5%)
Lead, foil, 10mm disks, thickness 0.025mm, 99.99+%
Lead, foil, 1000x1000mm, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 20m coil, thickness 0.12mm, coil width 25.4mm, as rolled, 99.95%
Lead, foil, 15mm disks, thickness 0.008mm, 99.99+%
Lead, foil, 100x100mm, thickness 1.0mm, as rolled, 99.5%
Lead, foil, 4mm disks, thickness 0.5mm, as rolled, 99.99+%
Lead, foil, 4mm disks, thickness 0.55mm, as rolled, 100%
Lead, foil, 300x300mm, thickness 0.15mm, as rolled, 99.95%
Lead, foil, 1m coil, thickness 0.125mm, as rolled, 99.95%
Lead, foil, 50x50mm, thickness 2.7mm, as rolled, 99.95%
Lead, foil, 15mm disks, thickness 0.04mm, 99.99+%
Lead, foil, 0.5m coil, thickness 1.0mm, as rolled, 99.5%
Lead, foil, 6mm disks, thickness 0.006mm, 99.99+%
Lead, foil, 6mm disks, thickness 0.5mm, as rolled, 99.95%
Lead, foil, 100x100mm, thickness 3.0mm, as rolled, 99.99+%