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3.3.3
Phosphor stage with accessories
Phosphor stage
The phosphor stage is used for scanning storage phosphor screens. The phosphor stage
is magnetic so that it holds the storage phosphor screen in place.
Storage phosphor screen
Storage phosphor screens, or phosphor imaging plates (IP), can be scanned by the
Amersham Typhoon scanner to capture two-dimensional images of radioactively labeled
samples.
A phosphor storage screen contains a layer of a polyester base material that is densely
coated with fine photo-stimulable crystals, for example BaFBr doped with traces of Eu
When the storage phosphor screen is exposed to radioactively labeled samples, the
energy of the ionizing radiation is absorbed in the crystals. The accumulated radiation
energy can subsequently be detected by the Amersham Typhoon scanner. The surface
of the storage phosphor screen is scanned with a laser inside the scanner, and the ex-
posed areas emit light, which is detected by the photomultiplier tube (PMT). In this way,
the Amersham Typhoon scanner creates a digital image of the radiated areas of the
storage phosphor screen.
Storage phosphor screens are exposed to radioisotope-labeled samples by placing them
in close contact with the samples in an X-ray film-like cassette.
After scanning, the storage phosphor screens can be erased using Amersham Eraser,
so that they can be re-used.
Amersham Typhoon Operating Instructions 29193226 AC
3 System description
3.3.3 Phosphor stage with accessories
3.3 Stages
2+
.
53
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