Reconstruction - GE Revolution CT User Manual

Table 1: mA adjustment factor
ASiR-V
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
For example, if 40% ASiR-V is selected, multiply the mA displayed in the mA control screen by
0.52, as indicated in
entered into the mA field on the mA control screen.
Multiply the Noise Index or manual mA values that were adjusted for an ASiR-V applied protocol
by the adjustment factors in
Use the following factors to return any manual mA values adjusted for ASiR-V to non- ASiR-V
value.
Table 2: Return to a value for a non-ASiR protocol
ASiR Level
30%
40%
50%

2.3 Reconstruction

Reconstruction of ASiR-V images involves defining the level of noise reduction desired for the
parameters used for various applications. Image reconstruction is a blending of the original
images and a percentage of an ASiR-V image. There are 10 blending levels available that are
the amount of noise reduction based on the maximum of the 100% image reconstructed with the
original image data. Reconstruction of ASiR-V images can be prescribed retrospectively in
Retro Recon. A New Series should be selected for each reconstruction of the data with ASiR-V
applied so comparisons and identification of series with ASiR-V can be made more easily.
ASiR-V is located on the Primary and secondary recon settings collection. ASiR-V Setup
Selection is 0% to 100%.
310
Table 1 to obtain the new mA for protocol using ASiR-V, that needs to be
Table 2.
Return to non-ASiR manual mA value
1.59
1.92
2.29
Direction 5480385-1EN, Revision 1
Normal
0.87
0.74
0.63
0.52
0.44
0.35
0.29
0.23
0.18
0.14
Revolution CT User Manual
2 ASiR-V