Helical scan
• X-ray tube rotation
speed:
0.75, 1, 1.5 s/360°
• Continuous scan time:
Max. 100 s
• Scan start time delay:
Min. 1 s
Setting is possible in increments
of 0.1 s.
• Image slice thickness:
– For 16-row scanning
(TCOT):
The maximum image slice thick-
ness is 10 mm.
– For 4-row scanning
(MUSCOT):
The maximum image slice thick-
ness is 10 mm.
• Scan field in the longi-
tudinal direction:
Max. 1,750 mm/scan (for the
long patient couch version)
Max. 1,450 mm/scan (for the
short patient couch version)
Up to 10 scan plans are pro-
grammable in one eXam Plan.
(Multiple and/or Multi-directional
Helical)
• Gantry tilt:
Helical scan is possible in the
range from 30° forward to 30°
backward (only for 16-slice
acquisition).
• Couch-top speed:
The couch-top speed can be
specified in the range from
0.8 mm/s to 96 mm/s.
• Helical pitch:
For 16-row scanning
(TCOT):
Setting is possible in the ranges
from 10 to 16 and from 18 to 24
in increments of 0.1.
For 4-row scanning
(MUSCOT):
Setting is possible in the range
from 2.5 to 3.5 and from 4.5 to
6.0 in increments of 0.5.
Helical pitch = Couch-top movement
(mm/rot.)/nominal scanning
slice thickness (mm)
CT pitch factor = Helical pitch/number of slices
scanned in a single rotation
Note: The CT pitch factor is defined by IEC 60601-2-44 Amd.1:
2002
•
SURE
Exposure
TM
Function for continuously vary-
ing the X-ray tube current to
ensure the optimal X-ray dose
during helical scanning.
• Image reconstruction
time:
Up to 10 images/s (0.1 s/image)
• Real-time helical
reconstruction time:
12 images/s (0.083 s/image)
(1 slice, 512
×
512 matrix)
MPDCT0290EA
Patient couch
• Vertical movement
System:
Hydraulically driven
– Speed of vertical
movement:
Up:
16 to 24 mm/s (50 Hz)
19 to 28 mm/s (60 Hz)
Down: 20 to 30 mm/s
– Stroke:
Approx. 588 mm
– Minimum couch-top
height:
Approx. 310 mm
– Maximum couch-top
height:
Approx. 944 mm
• Couch-top movement
System:
Motor-driven or manual
– Speed of movement: 130 mm/s (fast)
10 mm/s (slow)
– Stroke:
2,190 mm (for the long patient
couch version)
1,890 mm (for the short patient
couch version)
– Scannable range:
1,800 mm (for the long patient
(with headrest)
couch version)
1,500 mm (for the short patient
couch version)
– Step feed pitch:
0.5 to 600 mm in 0.5-mm
increments
– Reproducibility:
±0.25 mm
Repeatable to within
±0.25 mm after 600-mm move-
ment
• Couch-top width:
470 mm
• Remote control from the console is possible.
Note: This function allows the user to check the image on the
console and adjust to the couch-top without leaving the
console. Adjustment is possible in 10-mm increments at
the console.
• Load limit
– Max. allowable load:
205 kg (450 lb)
• Footswitch:
Auto set/Auto home function can
be selected.
Voice-recorded instruction and scan system
(VoiceLink)
Voice instructions to the patient can be recorded electroni-
cally by the operator and automatically played back during
scan sequences as part of the eXam Plan.
• Number of messages:
Max. 32 messages
• Number of seconds:
Max. 128 s for a total of
32 messages
• Recording time:
Max. 30 s per message
• Delay time setting:
The delay time between the end
of the message and the start of
scanning can be set up to 10 s
in increments of 1 s.
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