GE Healthcare Optima CT660S - Manual (Page 5)

Giving you profound image clarity
at low dose
ASiR***
ASiR may help clinicians achieve dose reductions of up
to 40% while delivering the diagnostic image quality
needed for confi dent diagnosis°. It may also improve low
contrast detectability
+ . ASiR, a projection-based iterative
reconstruction technology, changes the dose paradigm
across many anatomies and patients. Customers using
ASiR have demonstrated excellent diagnostic image
quality at low dose across exam types and body regions.
Optidose*
Dose reduction with ASiR is combined with
GE Healthcare’s proven Optidose technologies that
deliver dose reduction at the source. Optidose offers
SmartTrack* dynamic collimation that keeps the X-ray
beam tightly focused on the active detector cells and
Dynamic Z-Axis tracking, which blocks unused X-rays
at the beginning and end of a helical scan.
Dose check*
Prior to starting the scan, Dose Check provides tools to
notify and alert the operator setting the scan parameters
whether the estimated dose index is above user-defi ned
notifi cation values. The Dose Check feature is designed
to comply with the NEMA XR-25-2010 standard.
ODM
In addition to the 3D and ECG mA modulation features,
the Optima* CT660S introduces Organ Dose Modulation
(ODM)—providing reduction of radiation dose via X-ray
tube mA modulation for superfi cial tissues (such as
breasts and crystal lenses). Dose reduction at the body
surface is up to 40%, while the noise increase of
the superfi cial internal structures is less than 10%.