Set The Kv And Ma Control; Set The Ma - GE Revolution CT User Manual

Table 20: Images per Rotation
Slice Thickness
○
The choice for one determines the choices for the other. Some combinations are not
allowed.
○ The choice of detector coverage and slice thickness determines the images per rotation.
Some combinations are not allowed.
5. For an Axial or Cine scan type, the interval is set equal to the detector coverage. The
interval value can be increased or decreased. If the interval is greater than the detector
coverage, the gap is between each rotation of data, not between the slices.
For an Axial scan type, the interval or spacing defaults to the equal number of images per
rotations multiplied by the slice thickness.
○
The interval for Axial scanning can be zero, equal to, or greater than the width of the
detector configuration.
○
Axial interval with skip refers to a gap between scan groups. This can be useful, for
example, when performing a survey exam, such as a high resolution chest exam.
6. Note the Total Exposure Time.
7. Click [Apply].
NOTE: The Total Exposure Time shown in the
for the interscan delay prescribed in the protocol.

4.5.3 Set the kV and mA Control

Use one of the following procedures to set the kV for the imaging study.

4.5.3.1 Set the mA

Use this procedure to set the mA for the scan prescription.
Scan Settings window, click kV and mA Control .
1. From the
2. Choose an
Manual mA and enter an mA value.
○
Set to
○ SmartmA or SmartmA and ODM to enable mA modulation in the x-y and z-
Set to
directions.
■
Select a Noise Index value that provides acceptable diagnostic quality. As the Noise
Index increases the required mA decreases and image noise increases. The
Chapter 11 Scan
(mm)
5
5 1i
2.5 2i
1.25 4i
0.625 NA
0.625z NA
mA Mode .
Detector Coverage (mm)
40 80
8i 16i
16i 32i
32i 64i
64i 128i
128i 256i
Coverage Speed collection does not account
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