GE Healthcare Discovery CT750 HD - Manual (Page 24)

Low dose cardiac imaging
with excellent IQ
at less than 1mSv
SnapShot Pulse and ASiR * enable
low dose not only for Coronary CT
but across cardiovascular exams,
enabling cardiac CT of less than
1mSv.
Using SnapShot Pulse imaging
and ASiR, the Discovery CT750 HD
achieves a dose reduction of
greater than 83% compared to
gated helical acquisition.
3,4,5
Acquisition protocols are easily
adapted to the clinical needs of
the individual patient for optimal
diagnostic results at low dose.
Intelligent system design helps to
manage high and unstable heart
rates in prospective and
retrospective modes.
1. Estimated Radiation Dose Reduction
Using Adaptive Statistical Iterative
Reconstruction in Coronary CT Angiography:
The ERASIR Study, AJR:195, 2010 Sept;
195(3):655-60
2. Effect of Standardized Quality-
Improvement Protocol on Radiation Dose
in Coronary Computed Tomographic
Angiography, Am J Cardiol, 2010 Dec 1;
106(11):1663-7
“In the multicenter ERASIR study 1
of more than 500 patients that
examined the effect of ASiR on
radiation dose, we noted a 27%
reduction in dose for patients
undergoing coronary CT angiography.
In the second independent study,
2
using a combination of SnapShot
imaging, reduced tube voltage and
ASiR, we have observed in 449
patients an average dose of 1.3 mSv
in unselected patients undergoing
CT angiography.”
James Min, M.D.
Co-director of Cardiac Imaging
Director of Cardiac Imaging Research
Cedars Sinai Heart Institute
3. In clinical practice, the use of ASiR may reduce CT patient dose depending on the
clinical task, patient size, anatomical location and clinical practice. A consultation
with a radiologist and a physicist should be made to determine the appropriate dose
to obtain diagnostic image quality for the particular clinical task.
4. Dose reduction was measured on a standard 20cm water phantom comparing a
SnapShot Pulse prospective gated axial acquisition at 120kV/300mA and 50% ASiR to
a cardiac helical acquisition 120kV/500mA without ASiR both with a 224mm scan
coverage.
5. In clinical practice, the use of SnapShot Pulse may reduce cardiac CT patient dose
depending on the clinical task and patient heart rate. A consultation with a radiologist
should be made to determine the appropriate acquisition mode and scan settings to
obtain diagnostic image quality for the particular clinical task.
24 GE Healthcare Discovery CT750 HD