Multi-slice scanner: Noise v. pitch
Notes:
For comparison, the noise measurements at constant mA for one of the multi-slice scanners have been plotted to the same scale as on the previous slide. Here we see that noise increases steadily with pitch, as predicted. Manufacturers of multi-slice scanners overcome this effect by building in an automatic rise in mA as pitch increases, which keeps patient dose constant.
So, re-plotting the data given on these two slides for constant dose rather than constant mA…