Philips CARDIOMD, Service Manual

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Overview
12-6
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CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
12.2.3 Line Source Housing with Shutter and Attenuator
Figure 12.3 shows the line source housing inside the line source compartment.
Figure 12.3 The line source housing with shutter mechanism
The line source compartment contains a drive enabling the line source to scan the detector FOV.
Whenever the source is not in use during an AC SPECT acquisition or a maintenance procedure,
the line source housing’s shutter is closed.
During transmission and reference scans, the line source housing’s shutter opens and the line
source scans across the detector FOV. The shutter is open during acquisition of AC SPECT and
Gated SPECT studies and during acquisition of reference scans. At all other times, the shutter is
closed.
On the end of the line source compartment, there is a knob allowing the line source shutter to be
closed manually.
The status of the shutter is indicated by the position of the knob and by the status LED. When the
shutter is open, the knob is OUT and the LED is ON. When the shutter is closed, the LED is OFF
and the knob is in position IN. See Figure 12.4.
Shutter open Shutter closed
Figure 12.4 Handle and LED indicating shutter position
Shutter indicator handle
in position IN
LED indicator
Shutter indicator handle
in position OUT
LED indicator
Shutter