About Storage Phosphor Screens; Introduction; Compatible Storage Phosphor Screens; Handling Precautions - GE HEALTHCARE Typhoon FLA 7000 User Manual

11 About storage phosphor screens

11.1 Introduction

The Storage phosphor screen is a radiation energy memory type, two-dimensional
sensor, which has an image recording layer consisting of polyester base material densely
coated with accelerated phosphorescent fluorescent material of fine crystals.
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11.2 Compatible storage phosphor screens

Storage phosphor screens with magnetic layers for sticking on the phosphor stage are
usable.

11.3 Handling precautions

Check the exposure environment
Do not stack cassettes during exposure.
Typhoon FLA 7000 User Manual 28-9607-62 AC
Exposure
A Storage phosphor screen accumulates and stores radiation energy while it is
exposed. It is exposed in close contact with an RI sample in a cassette like X-ray film.
Scanning
The recording surface of an exposed Storage phosphor screen is scanned with a
laser beam inside Typhoon FLA 7000 and emits fluorescent light according to the
exposure level. A photo-multiplier tube (PMT) detects the fluorescent light and converts
it into electric signals. A radiation image recorded on the Storage phosphor screen
during exposure is read as digital image information at the maximum resolution of
25 µm per pixel (40 pixels/mm) and recorded in the analyzer unit.
Erasure
You may reuse a general-purpose Storage phosphor screen by erasing an
after-image.
NOTICE
Avoid exposing storage phosphor screens in places where the
environmental radiation may be increased, for example rooms with
concrete walls or in basements.
11 About storage phosphor screens
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